CN105089592A - Injection process and injection equipment of chemical heat generating system in thick oil storage layer - Google Patents
Injection process and injection equipment of chemical heat generating system in thick oil storage layer Download PDFInfo
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- CN105089592A CN105089592A CN201510420011.XA CN201510420011A CN105089592A CN 105089592 A CN105089592 A CN 105089592A CN 201510420011 A CN201510420011 A CN 201510420011A CN 105089592 A CN105089592 A CN 105089592A
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- 239000002253 acid Substances 0.000 claims description 18
- 238000000605 extraction Methods 0.000 claims description 17
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical group [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 claims description 14
- 229910052782 aluminium Inorganic materials 0.000 claims description 14
- 239000004411 aluminium Substances 0.000 claims description 14
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical group [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 14
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- 238000002360 preparation method Methods 0.000 claims description 8
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- 238000010794 Cyclic Steam Stimulation Methods 0.000 claims description 6
- ROOXNKNUYICQNP-UHFFFAOYSA-N ammonium persulfate Chemical compound [NH4+].[NH4+].[O-]S(=O)(=O)OOS([O-])(=O)=O ROOXNKNUYICQNP-UHFFFAOYSA-N 0.000 claims description 6
- CEGOLXSVJUTHNZ-UHFFFAOYSA-K aluminium tristearate Chemical compound [Al+3].CCCCCCCCCCCCCCCCCC([O-])=O.CCCCCCCCCCCCCCCCCC([O-])=O.CCCCCCCCCCCCCCCCCC([O-])=O CEGOLXSVJUTHNZ-UHFFFAOYSA-K 0.000 claims description 5
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- USHAGKDGDHPEEY-UHFFFAOYSA-L potassium persulfate Chemical compound [K+].[K+].[O-]S(=O)(=O)OOS([O-])(=O)=O USHAGKDGDHPEEY-UHFFFAOYSA-L 0.000 claims description 3
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Abstract
The invention discloses an injection process of a chemical heat generating system in a thick oil storage layer; a cold production mode is used for injecting as follows: heat generating agent slug injection, separation liquid slug injection, trigger agent slug injection, replacement liquid slug injection, well closing and well opening production; a steam injection heat production mode is used for injecting as follows: steam preheating slug injection, heat generating agent slug injection, separation liquid slug injection, trigger agent slug injection, replacement liquid slug injection, well braising and well opening production; the process is simple in steps, reasonable in design, convenient to operate, safe and reliable in injection process and excellent in use effect, and can simply finish the injection process of the chemical heat generating system in the thick oil storage layer; moreover, the invention further discloses injection equipment of the chemical heat generating system in the thick oil storage layer; the equipment comprises four liquid mixing devices and one liquid injection pipe connected with a shaft of a target well; a plunger pump, a pressure detecting unit and a fifth one-way valve are mounted on the liquid injection pipe; and the equipment is simple in structure, reasonable in design, convenient for pipeline connection, simple in use and operation and excellent in use effect.
Description
Technical field
The invention belongs to the Technology of Heavy Oil Recovery field, especially relate to chemical Self-heating system injection technology and injection device in a kind of thick oil reservoir.
Background technology
Viscous crude aboundresources, development significance are great, and a distinguishing feature of heavy crude reservoir is that thick oil viscosity is high, relative density large under formation conditions and fluid ability is poor, is thus difficult to economy with routine techniques, effectively develops.But the viscosity temperature of viscous crude is very responsive, namely temperature raises thick oil viscosity and significantly reduces, and viscosity is higher, the amplitude declined is larger, be tending towards Newtonian fluid during now viscous crude flowing, this is the important thermophysical property of viscous crude, is also the basic foundation of oil recovery by heating.Super-viscous oil refers to that viscosity of thickened oil is greater than the oil of 50000 (mPas) milli handkerchief second.
At present, the main exploitation means being viscous crude with steam flooding and steam soak both at home and abroad, for the problem that the effective radius of influence existed in heavy oil exploitation via steam injection process is too small, in conjunction with space flight navigational field high heat density fuel technology, propose to inject the auxiliary temperature raising theory of chemical heat-generating agent (also referred to as chemical Self-heating system or heat-generating agents) to the formation at target locations that steam is under-effected, by Self-heating reaction precision Control Technology in the injection technology optimization layer of stability and safety, and optimize the supporting technology with other heavy crude heat extraction means such as steam injection and hydrothermal cracking thereof, to realize having Self-heating reaction in the layer under steam injection condition, effective increase ground layer for heating radius, promote the exploitation effect of the heavy crude heat extraction such as steam soak or hydrothermal cracking technology.Nowadays, field use comparatively widely chemical Self-heating system have nitrite and ammonium salt heat-dissipating system, H
2o
2the oxidation of aldehydes heat-dissipating system of heat-dissipating system, polyhydroxy and active metal heat-dissipating system, better from exothermic energy active metal heat-dissipating system, comparatively adapt to the Self-heating demand in viscous crude super-viscous oil layer.Active metal heating element owner will comprise heat generating agent and trigger agent, and wherein heat generating agent is active metal, as aluminium, magnesium etc.Because active metal heat-dissipating system relates to the dangerous material such as active metal particle, highly basic, need strictly to inject by multistage plug, and existing conventional injection device and injection technology realize difficulty, and complicated operation, danger coefficient are high.
Summary of the invention
Technical problem to be solved by this invention is for above-mentioned deficiency of the prior art, chemical Self-heating system injection technology in a kind of thick oil reservoir is provided, its processing step is simple, reasonable in design and easy to operate, result of use is good, the easy injection process completing chemical Self-heating system in thick oil reservoir of energy, injection process is safe and reliable, inject that chemical Self-heating system heat-dissipating efficiency is high and temperature raising is effective.
For solving the problems of the technologies described above, the technical solution used in the present invention is: chemical Self-heating system injection technology in a kind of thick oil reservoir, is characterized in that: adopt cold mode or the heat extraction by steam injection mode of adopting to inject chemical Self-heating system in thick oil reservoir residing for target well; Described chemical Self-heating system comprises heat generating agent and triggers agent and it is for alkaline Self-heating system or acid Self-heating system, and described heat generating agent comprises granularity and is not more than 400 objects and lives ripple metallic particles and the clads for wrapping up ripple metallic particles alive; The ripple metallic particles alive of described alkaline Self-heating system is aluminium powder, be paraffin clad or aluminum stearate clad for wrapping up the clad of aluminium powder, the triggering agent of described alkaline Self-heating system is NaOH powder, and the mass ratio of aluminium powder and NaOH powder is 1 ︰ (1.0 ~ 2.5); The ripple metallic particles alive of described acid Self-heating system is magnesium powder, and be paraffin clad or dolomol clad for wrapping up the clad of magnesium powder, the triggering agent of described acid Self-heating system is P
2o
5powder, magnesium powder and P
2o
5the mass ratio of powder is 1 ︰ (1.0 ~ 2.0); Before injecting described chemical Self-heating system, the Acidity of Aikalinity of first thick oil reservoir residing for target well, the type of injected chemical Self-heating system is determined: when thick oil reservoir residing for target well is for time acid, to inject chemical Self-heating system be alkaline Self-heating system; When thick oil reservoir residing for target well is alkalescence, to inject chemical Self-heating system be acid Self-heating system;
Wherein, when adopting cold mode of adopting to inject chemical Self-heating system in thick oil reservoir residing for target well, process is as follows:
Step 101, heat generating agent slug: the heat generating agent suspension prepared in advance is injected in thick oil reservoir residing for target well;
Described heat generating agent suspension is the suspension be uniformly mixed to form by heat generating agent and water, and in described heat generating agent suspension, the mass percent concentration of heat generating agent is 28% ~ 35%; Injection rate thick oil reservoir temperature increase institute calorific requirement residing for target well of described heat generating agent suspension is determined;
Step 102, spacer slug: the insulating liquid prepared in advance is injected in thick oil reservoir residing for target well;
The injection rate of described insulating liquid is 35% ~ 40% of the wellbore volume of target well;
Step 103, triggering agent slug: the triggering agent solution prepared in advance is injected in thick oil reservoir residing for target well, described triggering agent solution is the solution be uniformly mixed to form by triggering agent and water, and the mass percent concentration triggering agent in described triggering agent solution is not less than 40%;
The injection rate of described triggering agent solution is determined according to the mass percent concentration triggering agent in the mass ratio of live in the mass percent concentration of heat generating agent in the injection rate of the suspension of heat generating agent described in step 101, described heat generating agent suspension, described chemical Self-heating system ripple metallic particles and triggering agent and described triggering agent solution;
Step 104, displacement fluid slug: the displacement fluid prepared in advance is injected in thick oil reservoir residing for target well;
The injection rate of described displacement fluid is 60% ~ 65% of the wellbore volume of target well;
Described in described displacement fluid and step 102, insulating liquid is aqueous surfactant solution, and in described aqueous surfactant solution, the mass concentration of surfactant is 0.12% ~ 0.18%;
Step 105, closing well: by target well closing well 60h ~ 80h;
Step 106, opening well and making production;
When adopting heat extraction by steam injection mode to inject chemical Self-heating system in thick oil reservoir residing for target well, process is as follows:
Step 201, steam preheating slug: in thick oil reservoir residing for target well, inject 280 tons ~ 320 tons steam, carry out preheating to thick oil reservoir residing for target well;
Step 202, according to the method described in step 101 to step 104, by first to after complete heat generating agent slug, spacer slug, triggering agent slug and displacement fluid slug process;
Step 203, stewing well: target well is boiled in a covered pot over a slow fire well 3d ~ 7d;
Step 204, opening well and making production.
Chemical Self-heating system injection technology in above-mentioned thick oil reservoir, is characterized in that: when carrying out steam preheating slug in step 201, cyclic steam stimulation method conveniently, in thick oil reservoir residing for target well, inject 280 tons ~ 320 tons steam; When carrying out stewing well in step 203, cyclic steam stimulation method conveniently, boils in a covered pot over a slow fire well 3d ~ 7d by target well.
Chemical Self-heating system injection technology in above-mentioned thick oil reservoir, is characterized in that: before carrying out heat generating agent slug in step 101, needs first in described heat generating agent suspension, add thickener and stir, every 1m
3heat generating agent suspension adds 1.8g ~ 2.6g thickener; When carrying out heat generating agent slug in step 101, the heat generating agent suspension added after thickener is injected in thick oil reservoir residing for target well.
Chemical Self-heating system injection technology in above-mentioned thick oil reservoir, is characterized in that: described thickener is hydroxyethylcellulose.
Chemical Self-heating system injection technology in above-mentioned thick oil reservoir, it is characterized in that: before injecting described chemical Self-heating system, first the temperature T of thick oil reservoir residing for target well is tested: when 60 ° of < T≤120 °, according to the method described in step 101 to step 106, cold mode of adopting is adopted to inject chemical Self-heating system in thick oil reservoir residing for target well; As T > 120 °, according to the method described in step 201 to step 204, heat extraction by steam injection mode is adopted to inject chemical Self-heating system in thick oil reservoir residing for target well; When T≤60 °, adopt cold mode of adopting to inject chemical Self-heating system in thick oil reservoir residing for target well, process is as follows:
Step 301, heat generating agent slug: according to the method described in step 101, complete heat generating agent slug process;
Step 302, initator slug: the initiator solution prepared in advance is injected in thick oil reservoir residing for target well; Described initiator solution is the solution be uniformly mixed to form by initator and water, and in described initiator solution, the mass concentration of initator is 35kg/m
3~ 45kg/m
3;
The injection rate of described initiator solution is 0.5m
3~ 1.8m
3;
Step 303, according to the method described in step 102 to step 104, by first to after complete spacer slug, trigger agent slug and displacement fluid slug process;
Step 304, closing well: by target well closing well 60h ~ 80h;
Step 305, opening well and making production.
Chemical Self-heating system injection technology in above-mentioned thick oil reservoir, is characterized in that: initator described in step 302 is ammonium persulfate or potassium peroxydisulfate.
Chemical Self-heating system injection technology in above-mentioned thick oil reservoir, is characterized in that: adopt cold mode or the heat extraction by steam injection mode of adopting when injecting chemical Self-heating system in thick oil reservoir residing for target well, adopt Self-heating system injection device to inject;
Described Self-heating system injection device comprises four apparatus for combining liquids and a liquid injection pipe be connected with the pit shaft of target well, the inlet of four described apparatus for combining liquids is connected with water injection equipment respectively by a filling pipe, the liquid outlet of four described apparatus for combining liquids is connected with liquid injection pipe respectively by a liquid-transport pipe-line, described liquid injection pipe is equipped with plunger displacement pump, pressure sensing cell and the 5th one way valve; Each described filling pipe is all provided with flow control valve and flow detection unit, each described liquid-transport pipe-line is all provided with one way valve;
Four described apparatus for combining liquids comprise three liquid mixing pits and a liquid blending tank, all mixing plant are housed in described liquid blending tank and three described liquid mixing pits, three described liquid mixing pits be respectively to the suspension of heat generating agent described in step 101 carry out mix and blend first liquid mixing pit, to trigger described in step 103 agent solution carry out mix and blend second liquid mixing pit and to the 3rd liquid mixing pit carrying out mix and blend in step 102 with aqueous surfactant solution described in step 104, be connected to water injection equipment and first liquid mixing pit, second liquid mixing pit, filling pipe between 3rd liquid mixing pit and liquid blending tank is respectively the first filling pipe, second filling pipe, 3rd filling pipe and the 4th filling pipe, the flow control valve that described first filling pipe is installed and flow detection unit are respectively first flow control valve and first flow detecting unit, the flow control valve that described second filling pipe is installed and flow detection unit are respectively second control valve and second amount detection unit, the flow control valve that described 3rd filling pipe is installed and flow detection unit are respectively the 3rd flow control valve and the 3rd flow detection unit, the flow control valve that described 4th filling pipe is installed and flow detection unit are respectively the 4th flow control valve and the 4th flow detection unit, first liquid mixing pit, second liquid mixing pit, the 3rd liquid mixing pit and liquid mix tank connected liquid-transport pipe-line and are respectively the first liquid-transport pipe-line, the second liquid-transport pipe-line, the 3rd liquid-transport pipe-line and the 4th liquid-transport pipe-line, and the one way valve that described first liquid-transport pipe-line, the second liquid-transport pipe-line, the 3rd liquid-transport pipe-line and the 4th liquid-transport pipe-line are installed is respectively the first one way valve, the second one way valve, the 3rd one way valve and the 4th one way valve,
Before injecting described chemical Self-heating system, the one way valve that the flow control valve that described 5th one way valve, each described filling pipe are installed and each described liquid-transport pipe-line are installed all is in closed condition.
Chemical Self-heating system injection technology in above-mentioned thick oil reservoir, is characterized in that: before carrying out heat generating agent slug in step 101, needs first in described heat generating agent suspension, add thickener and stir, every 1m
3heat generating agent suspension adds 1.8g ~ 2.6g thickener; When carrying out heat generating agent slug in step 101, the heat generating agent suspension added after thickener is injected in thick oil reservoir residing for target well;
Before injecting described chemical Self-heating system, first to the suspension of heat generating agent described in step 101, insulating liquid described in step 102, agent solution is triggered described in step 103, described in displacement fluid described in step 104 and step 302, the injection rate of initiator solution is determined respectively, and to the described heat generating agent suspension of preparation, described insulating liquid, described triggering agent solution, the water supply volume M1 of described displacement fluid and described initiator solution, M2, M3, M4 and M5 and described heat generating agent, described triggering agent, described surfactant, the consumption of described thickener and described initator is determined respectively, afterwards, described heat generating agent suspension, described triggering agent solution, described aqueous surfactant solution and described initiator solution are mixed respectively,
Wherein, when described heat generating agent suspension is mixed, open first flow control valve, by the first filling pipe to water filling in first liquid mixing pit and water injection rate is m1, wherein m1=(85% ~ 90%) × M1; After water filling completes, close first flow control valve; Again according to the consumption of the described thickener determined, described thickener to be added in first liquid mixing pit and to stir; Afterwards, according to the consumption of the described heat generating agent determined, described heat generating agent to be added in first liquid mixing pit and to stir, until institute adds heat generating agent be all in suspended state, obtaining the heat generating agent suspension after adding thickener;
When described triggering agent solution is mixed, open second control valve, by the second filling pipe to water filling in second liquid mixing pit and water injection rate is m2, wherein m2=(85% ~ 90%) × M3; After water filling completes, close second control valve; Again according to the consumption of the described triggering agent determined, described triggering agent to be added in second liquid mixing pit and to stir, until institute adds and triggers agent and dissolve all completely, obtaining the triggering agent solution after dissolving;
When described aqueous surfactant solution is mixed, according to water supply volume M2 and the M4 of the described insulating liquid determined and described displacement fluid, open the 3rd flow control valve, by the 3rd filling pipe to water filling in the 3rd liquid mixing pit; After water filling completes, close the 3rd flow control valve; Again according to the consumption of the described surfactant determined, described surfactant to be added in the 3rd liquid mixing pit and to stir, obtaining described aqueous surfactant solution;
When described initiator solution is mixed, open the 4th flow control valve, by the 4th filling pipe to water filling in liquid blending tank and water injection rate is m3, wherein m3=(85% ~ 90%) × M5; After water filling completes, close the 4th flow control valve; Again according to the consumption of the described initator determined, described initator to be added in liquid blending tank and to stir, dissolving all completely until institute adds initator, obtaining the initiator solution after dissolving;
After described heat generating agent suspension, described triggering agent solution, described aqueous surfactant solution and described initiator solution have all mixed, start plunger displacement pump and injected described chemical Self-heating system; In described chemical Self-heating system injection process, described plunger displacement pump continuous operation;
When carrying out heat generating agent slug in step 101, opening the first one way valve, injecting thick oil reservoir residing for target well by adding the heat generating agent suspension after thickener in first liquid mixing pit; When heat generating agent suspension after adding thickener in described first liquid mixing pit is about to note, open first flow control valve, by the first filling pipe to water filling in first liquid mixing pit and water injection rate is m4, wherein m4=M1-m1; After water filling completes, close first flow control valve; After thick oil reservoir residing for target well is all injected in institute's water filling in first liquid mixing pit, complete heat generating agent slug process;
When step 103 carries out triggering agent slug, open the second one way valve, the triggering agent solution after dissolving in second liquid mixing pit is injected thick oil reservoir residing for target well; When triggering agent solution after dissolving in described second liquid mixing pit is about to note, open second control valve, by the second filling pipe to water filling in second liquid mixing pit and water injection rate is m5, wherein m5=M3-m2; After water filling completes, close second control valve; After thick oil reservoir residing for target well is all injected in institute's water filling in second liquid mixing pit, complete and trigger agent slug process;
When carrying out initator slug in step 302, open the 4th one way valve, the initiator solution after dissolving in liquid blending tank is injected thick oil reservoir residing for target well; When initiator solution after dissolving in described liquid blending tank is about to note, open the 4th flow control valve, by the 4th filling pipe to water filling in liquid blending tank and water injection rate is m6, wherein m6=M5-m3; After water filling completes, close second control valve; After thick oil reservoir residing for target well is all injected in institute's water filling in liquid blending tank, complete initator slug process.
Simultaneously, the invention also discloses a kind of structure simple, reasonable in design and pipeline is easy to connect, use easy and simple to handle, chemical Self-heating system injection device in the thick oil reservoir that result of use is good, it is characterized in that: comprise four apparatus for combining liquids and a liquid injection pipe be connected with the pit shaft of target well, the inlet of four described apparatus for combining liquids is connected with water injection equipment respectively by a filling pipe, the liquid outlet of four described apparatus for combining liquids is connected with liquid injection pipe respectively by a liquid-transport pipe-line, described liquid injection pipe is equipped with plunger displacement pump, pressure sensing cell and the 5th one way valve, each described filling pipe is all provided with flow control valve and flow detection unit, each described liquid-transport pipe-line is all provided with one way valve,
Four described apparatus for combining liquids comprise three liquid mixing pits and a liquid blending tank, all mixing plant are housed in described liquid blending tank and three described liquid mixing pits, three described liquid mixing pits be respectively to the suspension of heat generating agent described in step 101 carry out mix and blend first liquid mixing pit, to trigger described in step 103 agent solution carry out mix and blend second liquid mixing pit and to the 3rd liquid mixing pit carrying out mix and blend in step 102 with aqueous surfactant solution described in step 104, be connected to water injection equipment and first liquid mixing pit, second liquid mixing pit, filling pipe between 3rd liquid mixing pit and liquid blending tank is respectively the first filling pipe, second filling pipe, 3rd filling pipe and the 4th filling pipe, the flow control valve that described first filling pipe is installed and flow detection unit are respectively first flow control valve and first flow detecting unit, the flow control valve that described second filling pipe is installed and flow detection unit are respectively second control valve and second amount detection unit, the flow control valve that described 3rd filling pipe is installed and flow detection unit are respectively the 3rd flow control valve and the 3rd flow detection unit, the flow control valve that described 4th filling pipe is installed and flow detection unit are respectively the 4th flow control valve and the 4th flow detection unit, first liquid mixing pit, second liquid mixing pit, the 3rd liquid mixing pit and liquid mix tank connected liquid-transport pipe-line and are respectively the first liquid-transport pipe-line, the second liquid-transport pipe-line, the 3rd liquid-transport pipe-line and the 4th liquid-transport pipe-line, and the one way valve that described first liquid-transport pipe-line, the second liquid-transport pipe-line, the 3rd liquid-transport pipe-line and the 4th liquid-transport pipe-line are installed is respectively the first one way valve, the second one way valve, the 3rd one way valve and the 4th one way valve.
Above-mentioned injection device, is characterized in that: also comprise the first current divider and the second current divider, and described first current divider is identical with the structure of the second current divider and the two includes first inlet/outlet and multiple second inlet/outlet; The delivery port of described water injection equipment is connected with the first inlet/outlet of the first current divider by connecting pipe, and four described second inlet/outlets of described first current divider are connected with the inlet of four described apparatus for combining liquids with the 4th filling pipe respectively by the first filling pipe, the second filling pipe, the 3rd filling pipe; The liquid outlet of four described apparatus for combining liquids is connected with four described second inlet/outlets of the second current divider respectively by the first liquid-transport pipe-line, the second liquid-transport pipe-line, the 3rd liquid-transport pipe-line and the 4th liquid-transport pipe-line, and the first inlet/outlet of described second current divider is connected with liquid injection pipe.
The present invention compared with prior art has the following advantages:
1, the chemical Self-heating system injection technology step adopted is simple, reasonable in design and realization is convenient, easy and simple to handle.
2, the chemical Self-heating system injection device structure adopted is simple, reasonable in design and installation laying is convenient, and input cost is lower.
3, the chemical Self-heating system injection device adopted uses easy and simple to handle, reliable working performance and result of use is good, and widely applicable, effectively can be applicable to injection and the Self-heating temperature raising synergy exploitation of chemical Self-heating system in viscous crude, super-viscous oil reservoir.
4, the simple and injection rate of the chemical Self-heating system preparation method adopted is easy to determine, result of use is good, have that heat-dissipating efficiency is high, transport and the advantage such as safe and reliable, the temperature sensitive triggering of injection process is rapid, and the Acidity of Aikalinity of thick oil reservoir residing for target well, there are alkaline Self-heating system and acid Self-heating system two type, specific aim is stronger, and temperature raising effect is better.
5, the temperature T of thick oil reservoir residing for target well, correspondence takes three kinds of dissimilar injection technologies, wherein, when 60 ° of < T≤120 °, adopt cold mode of adopting to inject chemical Self-heating system in thick oil reservoir residing for target well 8, injection process mainly comprises heat generating agent slug, spacer slug, triggering agent slug and displacement fluid slug four steps; As T > 120 °, adopt heat extraction by steam injection mode to inject chemical Self-heating system in thick oil reservoir residing for target well 8, injection process mainly comprises steam preheating slug, heat generating agent slug, spacer slug, triggering agent slug and displacement fluid slug five steps; When T≤60 °, cold mode of adopting is adopted to inject chemical Self-heating system in thick oil reservoir residing for target well 8, injection process mainly comprises heat generating agent slug, initator slug, spacer slug, triggering agent slug and displacement fluid slug five steps, inject effect better, the thick oil reservoir that can meet different temperatures T injects demand.
6, liquid injection pipe is equipped with pressure sensing cell, can carries out detecting fast, accurately to injection pressure, and intuitively can indicate testing result, be conducive to the pressure change of monitoring liquid injection pipe in time, for adjustment injection parameter provides foundation.Meanwhile, filling pipe is equipped with flow control valve and flow detection unit, the injection flow of each filling pipe of easy, rapid adjustment.
7, plunger displacement pump liquid injection pipe installed can meet heat generating agent suspension, trigger agent solution, aqueous surfactant solution and initiator solution pump into demand, and in chemical Self-heating system injection process, plunger displacement pump not termination of pumping, continuous operation, easy and simple to handle and realization facilitates, and injection process safety, reliable and efficient, avoid consuming time, the effort because repeatedly repetition start and stop plunger displacement pump brings, easily cause the problems such as plunger displacement pump damage.
8, by the pumping pressure of pilot plunger pump, can carry out easy to the injection pressure of liquid injection pipe, regulate fast and accurately, simultaneously in conjunction with the pressure sensing cell on the flow control valve on each filling pipe and flow detection unit and liquid injection pipe, realize heat generating agent suspension, trigger agent solution, the injection rate of aqueous surfactant solution and initiator solution, injection flow and injection pressure are carried out easy, demand for control fast and accurately, thus the easy of chemical Self-heating system injection process can be realized, control object fast and accurately, and corresponding reaching carries out the object of security control to pyrogenic reaction in oil storage residing for target well layer by layer.
9, the chemical Self-heating system injection device adopted easyly can realize heat generating agent suspension, trigger the extemporaneous preparation of agent solution, aqueous surfactant solution and initiator solution and easy, efficiently inject.Further, by adding thickener in heat generating agent suspension, what can solve particle heat generating agent efficiently carries problem.
10, processing step is simple, reasonable in design and easy to operate, water-injection efficiency is high, result of use good, the easy injection process completing chemical Self-heating system in thick oil reservoir of energy, injection process is safe and reliable, inject that chemical Self-heating system heat-dissipating efficiency is high and temperature raising is effective, have that equipment is simple, arrangement convenience, perfect in shape and function and easy and simple to handle, inject the advantages such as effective, the object that viscous crude super-viscous oil reservoir inner Self-heating chemistry temperature raising medicament system pumps into safely and pyrogenic reaction is controlled can be realized.Further, the present invention can realize heat generating agent suspension, triggers the accurate quantification of agent solution, aqueous surfactant solution and initiator solution, divide a slug to inject, pressure within 25MPa, flow is at 10m
3/ h is adjustable with quantification, and the Safety Injection meeting active metal system accurately controls with reaction, and point slug simultaneously also meeting other Self-heating systems widely used at present accurately injects demand.
11, widely applicable, be particularly useful for that total completion time is good, shaft bottom mechanical sand control equipment and reservoir permeability is greater than 100 × 10
-3μm
2, reservoir thickness is greater than 3m, reservoir temperature is less than 120 degrees Celsius oil well, and be preferably applied in viscosity of crude and be greater than 2000mPas, the heavy oil wells that feed flow is poor and edge or do not possess the heavy oil wells of steam injection condition.Adopt the present invention when carrying out Self-heating operation, according to reservoir temperature, different or mining type (cold adopt, steam injection adopt) is different, selects different injection technologies.
Below by drawings and Examples, technical scheme of the present invention is described in further detail.
Accompanying drawing explanation
The injection technology FB(flow block) of Fig. 1 when to be thick oil reservoir temperature adopt the cold mode of adopting to inject chemical Self-heating system higher than the present invention when 60 °.
The injection technology FB(flow block) of Fig. 2 when to be thick oil reservoir temperature adopt the cold mode of adopting to inject chemical Self-heating system lower than the present invention when 60 °.
Fig. 3 is the injection technology FB(flow block) of the present invention when adopting heat extraction by steam injection mode to inject chemical Self-heating system.
Fig. 4 is the structural representation of injection device of the present invention.
Description of reference numerals:
1-water injection equipment; 2-first liquid mixing pit; 3-second liquid mixing pit;
4-the three liquid mixing pit; 5-liquid blending tank; 6-the second current divider;
7-plunger displacement pump; 8-target well; 9-1-first flow control valve;
9-2-second control valve; 9-3-the 3rd flow control valve;
9-4-the 4th flow control valve; 10-1-the first one way valve; 10-2-the second one way valve;
10-3-the 3rd one way valve; 10-4-the 4th one way valve; 10-5-the 5th one way valve;
11-1-first flow detecting unit;
11-2-second amount detection unit;
11-3-the 3rd flow detection unit;
11-4-the 4th flow detection unit; 12-pressure gauge;
13-the first current divider; 14-liquid injection pipe.
Detailed description of the invention
Embodiment 1
Chemical Self-heating system injection technology in a kind of thick oil reservoir as shown in Figure 1, Figure 2 and Figure 3, adopts cold mode or the heat extraction by steam injection mode of adopting to inject chemical Self-heating system in thick oil reservoir residing for target well 8; Described chemical Self-heating system comprises heat generating agent and triggers agent and it is for alkaline Self-heating system or acid Self-heating system, and described heat generating agent comprises granularity and is not more than 400 objects and lives ripple metallic particles and the clads for wrapping up ripple metallic particles alive; The ripple metallic particles alive of described alkaline Self-heating system is aluminium powder, be paraffin clad or aluminum stearate clad for wrapping up the clad of aluminium powder, the triggering agent of described alkaline Self-heating system is NaOH powder, and the mass ratio of aluminium powder and NaOH powder is 1 ︰ (1.0 ~ 2.5); The ripple metallic particles alive of described acid Self-heating system is magnesium powder, and be paraffin clad or dolomol clad for wrapping up the clad of magnesium powder, the triggering agent of described acid Self-heating system is P
2o
5powder, magnesium powder and P
2o
5the mass ratio of powder is 1 ︰ (1.0 ~ 2.0); Before injecting described chemical Self-heating system, the Acidity of Aikalinity of first thick oil reservoir residing for target well 8, the type of injected chemical Self-heating system is determined: when thick oil reservoir residing for target well 8 is for time acid, to inject chemical Self-heating system be alkaline Self-heating system; When thick oil reservoir residing for target well 8 is alkalescence, to inject chemical Self-heating system be acid Self-heating system;
Wherein, when adopting cold mode of adopting to inject chemical Self-heating system in thick oil reservoir residing for target well 8, process is as follows:
Step 101, heat generating agent slug: the heat generating agent suspension prepared in advance is injected in thick oil reservoir residing for target well 8;
Described heat generating agent suspension is the suspension be uniformly mixed to form by heat generating agent and water, and in described heat generating agent suspension, the mass percent concentration of heat generating agent is 28% ~ 35%; Injection rate thick oil reservoir temperature increase institute calorific requirement residing for target well 8 of described heat generating agent suspension is determined;
Step 102, spacer slug: the insulating liquid prepared in advance is injected in thick oil reservoir residing for target well 8;
The injection rate of described insulating liquid is 35% ~ 40% of the wellbore volume of target well 8;
Step 103, triggering agent slug: the triggering agent solution prepared in advance is injected in thick oil reservoir residing for target well 8, described triggering agent solution is the solution be uniformly mixed to form by triggering agent and water, and the mass percent concentration triggering agent in described triggering agent solution is not less than 40%;
The injection rate of described triggering agent solution is determined according to the mass percent concentration triggering agent in the mass ratio of live in the mass percent concentration of heat generating agent in the injection rate of the suspension of heat generating agent described in step 101, described heat generating agent suspension, described chemical Self-heating system ripple metallic particles and triggering agent and described triggering agent solution;
Step 104, displacement fluid slug: the displacement fluid prepared in advance is injected in thick oil reservoir residing for target well 8;
The injection rate of described displacement fluid is 60% ~ 65% of the wellbore volume of target well 8;
Described in described displacement fluid and step 102, insulating liquid is aqueous surfactant solution, in described aqueous surfactant solution surfactant mass concentration be 0.12% ~ 0.18%;
Step 105, closing well: by target well 8 closing well 60h ~ 80h;
Step 106, opening well and making production;
When adopting heat extraction by steam injection mode to inject chemical Self-heating system in thick oil reservoir residing for target well 8, process is as follows:
Step 201, steam preheating slug: in thick oil reservoir residing for target well 8, inject 280 tons ~ 320 tons steam, carry out preheating to thick oil reservoir residing for target well 8;
Step 202, according to the method described in step 101 to step 104, by first to after complete heat generating agent slug, spacer slug, triggering agent slug and displacement fluid slug process;
Step 203, stewing well: target well 8 is boiled in a covered pot over a slow fire well 3d ~ 7d;
Step 204, opening well and making production.
In the present embodiment, before injecting described chemical Self-heating system, first the temperature T of thick oil reservoir residing for target well 8 is tested: when 60 ° of < T≤120 °, according to the method described in step 101 to step 106, adopt cold mode of adopting to inject chemical Self-heating system in thick oil reservoir residing for target well 8, refer to Fig. 1; As T > 120 °, according to the method described in step 201 to step 204, adopt heat extraction by steam injection mode to inject chemical Self-heating system in thick oil reservoir residing for target well 8, refer to Fig. 3; As shown in Figure 2, when T≤60 °, adopt cold mode of adopting to inject chemical Self-heating system in thick oil reservoir residing for target well 8, process is as follows:
Step 301, heat generating agent slug: according to the method described in step 101, complete heat generating agent slug process;
Step 302, initator slug: the initiator solution prepared in advance is injected in thick oil reservoir residing for target well 8; Described initiator solution is the solution be uniformly mixed to form by initator and water, and in described initiator solution, the mass concentration of initator is 35kg/m
3~ 45kg/m
3;
The injection rate of described initiator solution is 0.5m
3~ 1.8m
3;
Step 303, according to the method described in step 102 to step 104, by first to after complete spacer slug, trigger agent slug and displacement fluid slug process;
Step 304, closing well: by target well 8 closing well 60h ~ 80h;
Step 305, opening well and making production.
In the present embodiment, the basic parameter of described target well 8, refers to table 1:
Table 1 target well basic parameter table
In the present embodiment, thick oil reservoir temperature increase institute calorific requirement residing for target well 8, when determining the injection rate of described heat generating agent suspension, specifically determines the consumption of heat generating agent in described heat generating agent suspension.Further, to when in described heat generating agent suspension, the consumption of heat generating agent is determined, in conjunction with the thermal discharge of heat generating agent, the consumption of budgetary estimate heat generating agent.Further, according to the thermal discharge of heat generating agent and the relation of steam heat, the consumption of heat generating agent is determined.
Wherein, the thermal discharge of heat generating agent, refers to the thermal discharge of one mole of described ripple metallic particles alive; In described acid Self-heating system, the thermal discharge of described ripple metallic particles alive is 467.7kJ/mol (i.e. 467.7kJ/molMg); In described alkaline Self-heating system, the thermal discharge of described ripple metallic particles alive is 416.5kJ/mol (i.e. 416.5kJ/molAl).Like this, thick oil reservoir temperature increase institute calorific requirement residing for target well 8, and in conjunction with the thermal discharge of described ripple metallic particles alive, the consumption of described ripple metallic particles alive can be calculated; Again according to the consumption of described ripple metallic particles alive, extrapolate the consumption of described heat generating agent; Afterwards, according to the consumption of described heat generating agent, extrapolate the injection rate of described heat generating agent suspension and the water supply volume M1 of described heat generating agent suspension.
In the present embodiment, residing for described target well 8, the temperature of thick oil reservoir temperature is 66 DEG C, according to the injection technology shown in Fig. 1, and adopts cold mode of adopting to inject chemical Self-heating system in thick oil reservoir residing for target well 8.
In the present embodiment, the chemical Self-heating system injected acts on 1.6 meters of thick oil pays (i.e. thick oil reservoir residing for target well 8) of 5 meters ~ 15 meters of scopes, crude oil lifts temperature to 120 DEG C, formation water lifts temperature to 100 DEG C, formation rock skeleton lifts temperature to 120 DEG C, the thermal discharge of heat generating agent presses 643.45kJ/mol, and the consumption that budgetary estimate goes out described ripple metallic particles alive is 2 tons, and the injection rate of described heat generating agent suspension is 10m
3, tackle water supply volume M1 mutually and determine.
During actual use, can according to actual needs, adjust the water supply volume M1 of described heat generating agent suspension, in described heat generating agent suspension, the mass percent concentration of heat generating agent is 28% ~ 35%.
After the consumption of described ripple metallic particles alive is determined, in conjunction with the mass ratio of described ripple metallic particles alive and described triggering agent, the consumption of described triggering agent is determined; Again according to the consumption of described triggering agent, the injection rate of described triggering agent capacity and water supply volume M3 are determined.In the present embodiment, the consumption triggering agent is 1.4 tons, and the injection rate triggering agent solution is 6m
3.
In the present embodiment, when determining the consumption of described triggering agent, the reactive chemistry formula according to described ripple metallic particles alive and described triggering agent is determined.When described acid Self-heating system uses, under the hot conditions in target well 8 pit shaft, the clad fusing on magnesium powder surface, coated magnesium powder and formation water and the triggering agent of injecting subsequently contact and occur to react as follows afterwards:
Mg+2H
2O→H
2↑+Mg(OH)
2↓；
P
2O
5+3H
2O→H
3PO
4；
3Mg(OH)
2+2H
3PO
4→Mg
3(PO
4)
2+6H
2O；
More than reaction is carried out simultaneously, and thus its reaction equation can be write as:
3Mg+P
2O
5+3H
2O→3H
2↑+Mg
3(PO
4)
2；
Mg
3(PO
4)
2for a kind of salt of solubility, formation is fanout free region, and the heat of 467.7KJ/molMg is released in its reaction, realizes the temperature raising of Self-heating chemistry.
When described alkaline Self-heating system uses, under the hot conditions in target well 8 pit shaft, the clad fusing on aluminium powder surface, coated aluminium powder and formation water and the triggering agent of injecting subsequently contact and occur to react as follows afterwards:
2Al+6H
2O→3H
2↑+2Al(OH)
3↓，
Al(OH)
3+NaOH→NaAlO
2+2H
2O，
More than reaction is carried out simultaneously, and thus its reaction equation can be write as:
2Al+2NaOH+2H
2O→3H
2↑+2NaAlO
2，
The heat of 416.5KJ/molAl is released in reaction, realizes the temperature raising of Self-heating chemistry.
When being prepared heat generating agent, when described clad is paraffin clad, the preparation method of described heat generating agent comprises the following steps:
Step 11, under the stirring condition of 65 DEG C ~ 70 DEG C, paraffin is added in cyclohexane until melt completely, obtain the coated solution that Quality of Paraffin Waxes concentration is 20% ~ 40%, then be (4 ~ 6) according to ripple metallic particles (magnesium powder or aluminium powder) of living with the mass ratio of paraffin under temperature-resistant stirring condition: work ripple metallic particles adds in coated solution by the ratio of 1, and constant temperature disperses 20min ~ 40min;
Step 12, the material after constant temperature dispersion in step 11 is dropped to room temperature at the stirring condition of 100rpm ~ 150rpm, paraffin, in ripple surface of metal particles condensation of living, filters after stratification, obtains filter residue;
Step 13, that filter residue described in step 12 is rinsed final vacuum with cyclohexane is dry, is then ground by the filter residue after vacuum drying, obtains solid granular heat generating agent; Vacuum drying temperature is 18 DEG C ~ 25 DEG C, and the vacuum drying time is 8h ~ 15h;
When described clad is dolomol clad, the preparation method of described heat generating agent comprises the following steps:
Step 21, under the water bath condition of 50 DEG C ~ 60 DEG C, absolute ethyl alcohol constant temperature is stirred 30min ~ 60min, then in absolute ethyl alcohol, stearic acid is added, be stirred to stearic acid to dissolve completely, obtain the coated solution that stearic acid mass concentration is 0.5% ~ 2%, be (80 ~ 120) according to live ripple metallic particles and stearic mass ratio under agitation again: work ripple metallic particles adds in coated solution by the ratio of 1, constant temperature dispersion 20min ~ 40min, stearic acid reacts with part ripple metallic particles alive and generates dolomol or aluminum stearate;
Step 22, by step 21 constant temperature dispersion after material drop to room temperature at the stirring condition of 100rpm ~ 150rpm, the dolomol that reaction generates or aluminum stearate are in residue magnesium powder or aluminium powder surface condensation, filter after continuing to stir 30min ~ 90min, obtain filter residue;
Step 23, vacuum drying is carried out to filter residue described in step 22, then the filter residue after vacuum drying is ground, obtain solid granular heat generating agent; Vacuum drying temperature is 18 DEG C ~ 25 DEG C, and the vacuum drying time is 8h ~ 15h.
In the present embodiment, pit shaft (also referred to as the sleeve pipe) volume in described target well 8 is
In the present embodiment, the injection rate of insulating liquid described in step 102 is 6m
3, the injection rate of displacement fluid described in step 104 is 10m
3.
During actual use, can according to specific needs, the injection rate of described insulating liquid and described displacement fluid be adjusted accordingly.
In the present embodiment, before carrying out heat generating agent slug in step 101, need first in described heat generating agent suspension, add thickener and stir, every 1m
3heat generating agent suspension adds 1.8g ~ 2.6g thickener; When carrying out heat generating agent slug in step 101, the heat generating agent suspension added after thickener is injected in thick oil reservoir residing for target well 8.Described thickener is water-soluble thickener.
In the present embodiment, described thickener is hydroxyethylcellulose.
Further, add thickener in described heat generating agent suspension while, also need to add sodium chloride in described heat generating agent suspension, add thickener and sodium chloride mass ratio be 1 ︰ 20 ~ 30.
In the present embodiment, when carrying out opening well and making production in step 106 neutralization procedure 204, conveniently flooding method, adopts water flood or air injection method to proceed the displacement of reservoir oil to target well 8.
As shown in Figure 4, adopt cold mode or the heat extraction by steam injection mode of adopting when injecting chemical Self-heating system in thick oil reservoir residing for target well 8, adopt Self-heating system injection device to inject.
Described Self-heating system injection device comprises four apparatus for combining liquids and a liquid injection pipe 14 be connected with the pit shaft of target well 8, the inlet of four described apparatus for combining liquids is connected with water injection equipment 1 respectively by a filling pipe, the liquid outlet of four described apparatus for combining liquids is connected with liquid injection pipe 14 respectively by a liquid-transport pipe-line, described liquid injection pipe 14 is equipped with plunger displacement pump 7, pressure sensing cell and the 5th one way valve 10-5; Each described filling pipe is all provided with flow control valve and flow detection unit, each described liquid-transport pipe-line is all provided with one way valve.
Four described apparatus for combining liquids comprise three liquid mixing pits and a liquid blending tank 5, all mixing plant are housed in described liquid blending tank 5 and three described liquid mixing pits, three described liquid mixing pits be respectively to the suspension of heat generating agent described in step 101 carry out mix and blend first liquid mixing pit 2, to trigger described in step 103 agent solution carry out mix and blend second liquid mixing pit 3 and to the 3rd liquid mixing pit 4 carrying out mix and blend in step 102 with aqueous surfactant solution described in step 104, be connected to water injection equipment 1 and first liquid mixing pit 2, second liquid mixing pit 3, filling pipe between 3rd liquid mixing pit 4 and liquid blending tank 5 is respectively the first filling pipe, second filling pipe, 3rd filling pipe and the 4th filling pipe, the flow control valve that described first filling pipe is installed and flow detection unit are respectively first flow control valve 9-1 and first flow detecting unit 11-1, the flow control valve that described second filling pipe is installed and flow detection unit are respectively second control valve 9-2 and second amount detection unit 11-2, the flow control valve that described 3rd filling pipe is installed and flow detection unit are respectively the 3rd flow control valve 9-3 and the 3rd flow detection unit 11-3, the flow control valve that described 4th filling pipe is installed and flow detection unit are respectively the 4th flow control valve 9-4 and the 4th flow detection unit 11-4, the liquid-transport pipe-line that first liquid mixing pit 2, second liquid mixing pit 3, the 3rd liquid mixing pit 4 are connected with liquid blending tank 5 is respectively the first liquid-transport pipe-line, the second liquid-transport pipe-line, the 3rd liquid-transport pipe-line and the 4th liquid-transport pipe-line, and the one way valve that described first liquid-transport pipe-line, the second liquid-transport pipe-line, the 3rd liquid-transport pipe-line and the 4th liquid-transport pipe-line are installed is respectively the first one way valve 10-1, the second one way valve 10-2, the 3rd one way valve 10-3 and the 4th one way valve 10-4.
Before injecting described chemical Self-heating system, the one way valve that the flow control valve that described 5th one way valve 10-5, each described filling pipe are installed and each described liquid-transport pipe-line are installed all is in closed condition.
In described chemical Self-heating system injection process, monitored by the injection pressure of described pressure sensing cell to liquid injection pipe 14, and by the control of injection pressure of liquid injection pipe 14 within 90% of the fracture pressure of thick oil reservoir residing for target well 8.
In the present embodiment, described Self-heating system injection device also comprises the first current divider 13 and the second current divider 6, and described first current divider 13 is identical with the structure of the second current divider 6 and the two includes first inlet/outlet and multiple second inlet/outlet; The delivery port of described water injection equipment 1 is connected by first inlet/outlet of connecting pipe with the first current divider 13, and four described second inlet/outlets of described first current divider 13 are connected with the inlet of four described apparatus for combining liquids with the 4th filling pipe respectively by the first filling pipe, the second filling pipe, the 3rd filling pipe; The liquid outlet of four described apparatus for combining liquids is connected with four described second inlet/outlets of the second current divider 6 respectively by the first liquid-transport pipe-line, the second liquid-transport pipe-line, the 3rd liquid-transport pipe-line and the 4th liquid-transport pipe-line, and the first inlet/outlet of described second current divider 6 is connected with liquid injection pipe 14.
In the present embodiment, the mixing plants installed in described liquid blending tank 5 and three described liquid mixing pits are electric mixing device, time saving and energy saving and operate simple and easy.
In the present embodiment, the volume of described first liquid mixing pit 2, second liquid mixing pit 3 and the 3rd liquid mixing pit 4 is 15m
3, the volume of described liquid blending tank 5 is 2m
3.
During actual use, can according to specific needs, the volume of first liquid mixing pit 2, second liquid mixing pit 3, the 3rd liquid mixing pit 4 and liquid blending tank 5 be adjusted accordingly.
In the present embodiment, described pressure sensing cell is pressure gauge 12, and described first flow detecting unit 11-1, second amount detection unit 11-2, the 3rd flow detection unit 11-3 and the 4th flow detection unit 11-4 are flow meter.
Actual use before, build the distributing room for water injection for water filling in target well 8 weeks sides, described water injection equipment 1 is arranged in distributing room for water injection.
In the present embodiment, the bottom of described first liquid mixing pit 2, second liquid mixing pit 3, the 3rd liquid mixing pit 4 and liquid blending tank 5 is inclined plane, the inlet of described first liquid mixing pit 2, second liquid mixing pit 3, the 3rd liquid mixing pit 4 and liquid blending tank 5 is all positioned at top and its liquid outlet is all positioned at the lower end on inclined plane, thus can guarantee that internal liquid pumps completely; Further, the inside wall of described first liquid mixing pit 2, second liquid mixing pit 3, the 3rd liquid mixing pit 4 and liquid blending tank 5 is provided with many articles of water level marking line, and the volume between adjacent two water level marking line is 0.5m
3.
Due to flow control valve that each described filling pipe is all installed and flow detection unit, thus can guarantee that water accurately injects according to quantity, and the injecting process is stablized.
In the present embodiment, the pump pressure of described plunger displacement pump 7 is greater than 30MPa and its frequency conversion drive, runs medium and comprises water, oil, polymer solution, is less than the solution of 100 microns of solid particles containing particle diameter, and acidproof, alkaline-resisting.
In the present embodiment, the one way valve that the flow control valve that described connecting pipe, described filling pipe, described liquid-transport pipe-line, liquid injection pipe 14, each filling pipe are installed, each liquid-transport pipe-line are installed, the first current divider 13 and all withstand voltage 25MPa of the second current divider 6 and acidproof, alkaline-resisting.
In the present embodiment, before injecting described chemical Self-heating system, first the injection rate triggering displacement fluid described in agent solution and step 104 described in insulating liquid described in the suspension of heat generating agent described in step 101, step 102, step 103 is determined respectively, and the consumption of the preparation water supply volume M1 of described heat generating agent suspension, described insulating liquid, described triggering agent solution and described displacement fluid, M2, M3 and M4 and described heat generating agent, described triggering agent, described surfactant and described thickener is determined respectively; Afterwards, described heat generating agent suspension, described triggering agent solution and described aqueous surfactant solution are mixed respectively;
Wherein, when described heat generating agent suspension is mixed, open first flow control valve 9-1, by the first filling pipe to water filling in first liquid mixing pit 2 and water injection rate is m1, wherein m1=(85% ~ 90%) × M1; After water filling completes, close first flow control valve 9-1; Again according to the consumption of the described thickener determined, described thickener to be added in first liquid mixing pit 2 and to stir; Afterwards, according to the consumption of the described heat generating agent determined, described heat generating agent to be added in first liquid mixing pit 2 and to stir, until institute adds heat generating agent be all in suspended state, obtaining the heat generating agent suspension after adding thickener.In the present embodiment, add fashionable to described thickener and described heat generating agent, addition is the whole of predefined consumption.Add fashionable to described thickener and described heat generating agent, all need slowly to add.Treat that described thickener to add in first liquid mixing pit 2 and to stir, and after reaching the viscosity designed in advance; Slowly add heat generating agent again.
When described triggering agent solution is mixed, open second control valve 9-2, by the second filling pipe to water filling in second liquid mixing pit 3 and water injection rate is m2, wherein m2=(85% ~ 90%) × M3; After water filling completes, close second control valve 9-2; Again according to the consumption of the described triggering agent determined, described triggering agent to be added in second liquid mixing pit 3 and to stir, until institute adds and triggers agent and dissolve all completely, obtaining the triggering agent solution after dissolving.In the present embodiment, add fashionable to described triggering agent, addition is the whole of predefined consumption.
When described aqueous surfactant solution is mixed, according to water supply volume M2 and the M4 of the described insulating liquid determined and described displacement fluid, open the 3rd flow control valve 9-3, by the 3rd filling pipe to water filling in the 3rd liquid mixing pit 4; After water filling completes, close the 3rd flow control valve 9-3; Again according to the consumption of the described surfactant determined, described surfactant to be added in the 3rd liquid mixing pit 4 and to stir, obtaining described aqueous surfactant solution.In the present embodiment, obtain aqueous surfactant solution amount be greater than the injection rate sum of described insulating liquid and described displacement fluid.Thus, by the 3rd filling pipe in the 3rd liquid mixing pit 4 during water filling, water injection rate is greater than M2+M4.
The present embodiment, when mixing described heat generating agent suspension, described triggering agent solution, described aqueous surfactant solution and described initiator solution, also needs to carry out pressure testing to injection device as shown in Figure 4.During pressure testing, adopt the aqueous surfactant solution in the 3rd liquid mixing pit 4 to carry out pressure testing, sprain and be pressed onto 20MPa, within 3 minutes, do not sting and do not leak for qualified.
After described heat generating agent suspension, described triggering agent solution and described aqueous surfactant solution have all mixed, start plunger displacement pump 7 and injected described chemical Self-heating system; In described chemical Self-heating system injection process, the continuous operation of described plunger displacement pump 7.That is, in described chemical Self-heating system injection process, the not termination of pumping of described plunger displacement pump 7.In the present embodiment, the injection rate of described initator capacity is zero.
When carrying out heat generating agent slug in step 101, opening the first one way valve 10-1, injecting thick oil reservoir residing for target well 8 by adding the heat generating agent suspension after thickener in first liquid mixing pit 2; When heat generating agent suspension after adding thickener in described first liquid mixing pit 2 is about to note, open first flow control valve 9-1, by the first filling pipe to water filling in first liquid mixing pit 2 and water injection rate is m4, wherein m4=M1-m1; After water filling completes, close first flow control valve 9-1; After thick oil reservoir residing for target well 8 is all injected in institute's water filling in first liquid mixing pit 2, complete heat generating agent slug process.
When step 103 carries out triggering agent slug, open the second one way valve 10-2, the triggering agent solution after dissolving in second liquid mixing pit 3 is injected thick oil reservoir residing for target well 8; When triggering agent solution after dissolving in described second liquid mixing pit 3 is about to note, open second control valve 9-2, by the second filling pipe to water filling in second liquid mixing pit 3 and water injection rate is m5, wherein m5=M3-m2; After water filling completes, close second control valve 9-2; After thick oil reservoir residing for target well 8 is all injected in institute's water filling in second liquid mixing pit 3, complete and trigger agent slug process.
In the present embodiment, carry out in heat generating agent slug process in step 101, Synchronous pressure gauge 12, rise rapidly when pressure or inject more than stopping during 15MPa, and ascertaining the reason; In injection process, observe the level change of heat generating agent suspension in first liquid mixing pit 2, when heat generating agent suspension after adding thickener in first liquid mixing pit 2 is about to note, open first flow control valve 9-1, observe first flow detecting unit flow value that 11-1 detects, by the first filling pipe to water filling in first liquid mixing pit 2 and water injection rate is m4, continue in the injecting process to stir, till in first liquid mixing pit 2, heat generating agent suspension all injects.
In the present embodiment, after heat generating agent slug completes in step 101, first open the 3rd one way valve 10-3, then close the first one way valve 10-1, do not need termination of pumping in process, insulating liquid is injected in thick oil reservoir residing for target well 8.In described insulating liquid injection process, observe the level change of the 3rd liquid mixing pit 4 internal surfactants aqueous solution, grasp the current injection rate of described insulating liquid.
After described insulating liquid has injected, first open the second one way valve 10-2, close the 3rd one way valve 10-3 again, termination of pumping is not needed in process, and observe the level change of the triggering agent solution after dissolving in second liquid mixing pit 3, when triggering agent solution after dissolving in second liquid mixing pit 3 is about to note, open second control valve 9-2, observe second amount detection unit flow value that 11-2 detects, by the second filling pipe to water filling in second liquid mixing pit 3 and water injection rate is m5, continue in the injecting process to stir, till second liquid mixing pit 3 internal trigger agent solution all injects.
In the present embodiment, trigger after agent slug completes in step 103, first open the 3rd one way valve 10-3, then close the second one way valve 10-2, do not need termination of pumping in process, displacement fluid is injected in thick oil reservoir residing for target well 8.In described displacement fluid injection process, observe the level change of the 3rd liquid mixing pit 4 internal surfactants aqueous solution, grasp the current injection rate of described displacement fluid.
After displacement fluid slug completes in step 104, close plunger displacement pump 7, and close the 3rd one way valve 10-3, simultaneously closing well 72 hours.After closed-in time arrives, opening well and making production, fulfils assignment.
During actual use, can according to specific needs, the closed-in time be adjusted.
Embodiment 2
In the present embodiment, as shown in Figure 2, as different from Example 1: temperature T≤60 ° of thick oil reservoir residing for described target well 8, adopt cold mode of adopting to inject chemical Self-heating system in thick oil reservoir residing for target well 8, process is as follows:
Step 301, heat generating agent slug: according to the method described in step 101, complete heat generating agent slug process;
Step 302, initator slug: the initiator solution prepared in advance is injected in thick oil reservoir residing for target well 8; Described initiator solution is the solution be uniformly mixed to form by initator and water, and in described initiator solution, the mass concentration of initator is 35kg/m
3~ 45kg/m
3;
The injection rate of described initiator solution is 0.5m
3~ 1.8m
3;
Step 303, according to the method described in step 102 to step 104, by first to after complete spacer slug, trigger agent slug and displacement fluid slug process;
Step 304, closing well: by target well 8 closing well 60h ~ 80h;
Step 305, opening well and making production.
In the present embodiment, before injecting described chemical Self-heating system, first to the suspension of heat generating agent described in step 301, insulating liquid described in initiator solution described in step 302 and step 303, the injection rate of described triggering agent solution and described displacement fluid is determined respectively, and to the described heat generating agent suspension of preparation, described insulating liquid, described triggering agent solution, the water supply volume M1 of described displacement fluid and described initiator solution, M2, M3, M4 and M5 and described heat generating agent, described triggering agent, described surfactant, the consumption of described thickener and described initator is determined respectively, afterwards, described heat generating agent suspension, described triggering agent solution, described aqueous surfactant solution and described initiator solution are mixed respectively.Wherein, described heat generating agent suspension, described triggering agent solution are all identical with embodiment 1 with the mixed method of described aqueous surfactant solution.
When described initiator solution is mixed, open the 4th flow control valve 9-4, by the 4th filling pipe to water filling in liquid blending tank 5 and water injection rate is m3, wherein m3=(85% ~ 90%) × M5; After water filling completes, close the 4th flow control valve 9-4; Again according to the consumption of the described initator determined, described initator to be added in liquid blending tank 5 and to stir, dissolving all completely until institute adds initator, obtain the initiator solution after dissolving.
In the present embodiment, after heat generating agent slug completes in step 301, first carry out initator slug.
In the present embodiment, described initator is water soluble starter, and described initator is ammonium persulfate or potassium peroxydisulfate.
Further, when carrying out initator slug in step 302, open the 4th one way valve 10-4, the initiator solution after dissolving in liquid blending tank 5 is injected thick oil reservoir residing for target well 8; When initiator solution after dissolving in described liquid blending tank 5 is about to note, open the 4th flow control valve 9-4, by the 4th filling pipe to water filling in liquid blending tank 5 and water injection rate is m6, wherein m6=M5-m3; After water filling completes, close second control valve 9-2; After thick oil reservoir residing for target well 8 is all injected in institute's water filling in liquid blending tank 5, complete initator slug process.
In the present embodiment, after in step 301, heat generating agent slug completes, first open the 4th one way valve 10-4, close the first one way valve 10-1 again, termination of pumping is not needed in process, and observe the level change of the initiator solution after dissolving in liquid blending tank 5, when initiator solution after dissolving in liquid blending tank 5 is about to note, open the 4th flow control valve 9-4, observe the 4th flow detection unit flow value that 11-4 detects, by the 4th filling pipe to water filling in liquid blending tank 5 and water injection rate is m6, continue in the injecting process to stir, till in liquid blending tank 5, initiator solution all injects.
After initator slug completes in step 302, first open the 3rd one way valve 10-3, then close the first one way valve 10-1, do not need termination of pumping in process, insulating liquid is injected in thick oil reservoir residing for target well 8.
In the present embodiment, all the other implantation steps are all identical with embodiment 1 with injection controling parameters.
Embodiment 3
In the present embodiment, as shown in Figure 3, as different from Example 1: the temperature T > 120 ° of thick oil reservoir residing for described target well 8, according to the method described in step 201 to step 204, adopt heat extraction by steam injection mode to inject chemical Self-heating system in thick oil reservoir residing for target well 8, process is as follows:
Step 201, steam preheating slug: in thick oil reservoir residing for target well 8, inject 280 tons ~ 320 tons steam, carry out preheating to thick oil reservoir residing for target well 8;
Step 202, according to the method described in step 101 to step 104, by first to after complete heat generating agent slug, spacer slug, triggering agent slug and displacement fluid slug process;
Step 203, stewing well: target well 8 is boiled in a covered pot over a slow fire well 3d ~ 7d;
Step 204, opening well and making production.
When carrying out steam preheating slug in step 201, cyclic steam stimulation method conveniently, injects 280 tons ~ 320 tons steam in thick oil reservoir residing for target well 8; When carrying out stewing well in step 203, cyclic steam stimulation method conveniently, boils in a covered pot over a slow fire well 3d ~ 7d by target well 8.In the present embodiment, when carrying out steam preheating slug in step 201, in thick oil reservoir residing for target well 8, inject 300 tons of steam.During actual use, can according to specific needs, the injection rate of steam be regulated.Wherein, the volume of 1 ton of steam is 150000 cubic metres ~ 160000 cubic metres.
In the present embodiment, when injecting 280 tons ~ 320 tons of steam in thick oil reservoir residing for target well 8, adopt steam injection equipment and injected by gas injection pipeline.
In step 203 in stewing well process, continue to inject steam in thick oil reservoir residing for target well 8 by gas injection pipeline.
In the present embodiment, all the other implantation steps are all identical with embodiment 1 with injection controling parameters.
The above; it is only preferred embodiment of the present invention; not the present invention is imposed any restrictions, every above embodiment is done according to the technology of the present invention essence any simple modification, change and equivalent structure change, all still belong in the protection domain of technical solution of the present invention.
Claims (10)
1. a chemical Self-heating system injection technology in thick oil reservoir, is characterized in that: adopt cold mode or the heat extraction by steam injection mode of adopting to inject chemical Self-heating system in the residing thick oil reservoir of target well (8); Described chemical Self-heating system comprises heat generating agent and triggers agent and it is for alkaline Self-heating system or acid Self-heating system, and described heat generating agent comprises granularity and is not more than 400 objects and lives ripple metallic particles and the clads for wrapping up ripple metallic particles alive; The ripple metallic particles alive of described alkaline Self-heating system is aluminium powder, be paraffin clad or aluminum stearate clad for wrapping up the clad of aluminium powder, the triggering agent of described alkaline Self-heating system is NaOH powder, and the mass ratio of aluminium powder and NaOH powder is 1 ︰ (1.0 ~ 2.5); The ripple metallic particles alive of described acid Self-heating system is magnesium powder, and be paraffin clad or dolomol clad for wrapping up the clad of magnesium powder, the triggering agent of described acid Self-heating system is P
2o
5powder, magnesium powder and P
2o
5the mass ratio of powder is 1 ︰ (1.0 ~ 2.0); Before injecting described chemical Self-heating system, first according to the Acidity of Aikalinity of the residing thick oil reservoir of target well (8), the type of injected chemical Self-heating system is determined: when the residing thick oil reservoir of target well (8) is for time acid, to inject chemical Self-heating system be alkaline Self-heating system; When the residing thick oil reservoir of target well (8) be alkaline, to inject chemical Self-heating system be acid Self-heating system;
Wherein, when adopting cold mode of adopting to inject chemical Self-heating system in the residing thick oil reservoir of target well (8), process is as follows:
Step 101, heat generating agent slug: the heat generating agent suspension prepared in advance is injected in the residing thick oil reservoir of target well (8);
Described heat generating agent suspension is the suspension be uniformly mixed to form by heat generating agent and water, and in described heat generating agent suspension, the mass percent concentration of heat generating agent is 28% ~ 35%; The injection rate of described heat generating agent suspension is determined according to target well (8) residing thick oil reservoir temperature increase institute calorific requirement;
Step 102, spacer slug: the insulating liquid prepared in advance is injected in the residing thick oil reservoir of target well (8);
The injection rate of described insulating liquid is 35% ~ 40% of the wellbore volume of target well (8);
Step 103, triggering agent slug: the triggering agent solution prepared in advance is injected in the residing thick oil reservoir of target well (8), described triggering agent solution is the solution be uniformly mixed to form by triggering agent and water, and the mass percent concentration triggering agent in described triggering agent solution is not less than 40%;
The injection rate of described triggering agent solution is determined according to the mass percent concentration triggering agent in the mass ratio of live in the mass percent concentration of heat generating agent in the injection rate of the suspension of heat generating agent described in step 101, described heat generating agent suspension, described chemical Self-heating system ripple metallic particles and triggering agent and described triggering agent solution;
Step 104, displacement fluid slug: the displacement fluid prepared in advance is injected in the residing thick oil reservoir of target well (8);
The injection rate of described displacement fluid is 60% ~ 65% of the wellbore volume of target well (8);
Described in described displacement fluid and step 102, insulating liquid is aqueous surfactant solution, and in described aqueous surfactant solution, the mass concentration of surfactant is 0.12% ~ 0.18%;
Step 105, closing well: by target well (8) closing well 60h ~ 80h;
Step 106, opening well and making production;
When adopting heat extraction by steam injection mode to inject chemical Self-heating system in the residing thick oil reservoir of target well (8), process is as follows:
Step 201, steam preheating slug: in the residing thick oil reservoir of target well (8), inject 280 tons ~ 320 tons steam, carry out preheating to the residing thick oil reservoir of target well (8);
Step 202, according to the method described in step 101 to step 104, by first to after complete heat generating agent slug, spacer slug, triggering agent slug and displacement fluid slug process;
Step 203, stewing well: by stewing for target well (8) well 3d ~ 7d;
Step 204, opening well and making production.
2. according to Self-heating system injection technology chemical in thick oil reservoir according to claim 1, it is characterized in that: when carrying out steam preheating slug in step 201, cyclic steam stimulation method conveniently, injects 280 tons ~ 320 tons steam in the residing thick oil reservoir of target well (8); When carrying out stewing well in step 203, cyclic steam stimulation method conveniently, by stewing for target well (8) well 3d ~ 7d.
3. according to Self-heating system injection technology chemical in the thick oil reservoir described in claim 1 or 2, it is characterized in that: before carrying out heat generating agent slug in step 101, need first in described heat generating agent suspension, add thickener and stir, every 1m
3heat generating agent suspension adds 1.8g ~ 2.6g thickener; When carrying out heat generating agent slug in step 101, the heat generating agent suspension added after thickener is injected in the residing thick oil reservoir of target well (8).
4., according to Self-heating system injection technology chemical in thick oil reservoir according to claim 3, it is characterized in that: described thickener is hydroxyethylcellulose.
5. according to Self-heating system injection technology chemical in the thick oil reservoir described in claim 1 or 2, it is characterized in that: before injecting described chemical Self-heating system, first the temperature T of the residing thick oil reservoir of target well (8) is tested: when 60 ° of < T≤120 °, according to the method described in step 101 to step 106, cold mode of adopting is adopted to inject chemical Self-heating system in the residing thick oil reservoir of target well (8); As T > 120 °, according to the method described in step 201 to step 204, heat extraction by steam injection mode is adopted to inject chemical Self-heating system in the residing thick oil reservoir of target well (8); When T≤60 °, adopt cold mode of adopting to inject chemical Self-heating system in the residing thick oil reservoir of target well (8), process is as follows:
Step 301, heat generating agent slug: according to the method described in step 101, complete heat generating agent slug process;
Step 302, initator slug: the initiator solution prepared in advance is injected in the residing thick oil reservoir of target well (8); Described initiator solution is the solution be uniformly mixed to form by initator and water, and in described initiator solution, the mass concentration of initator is 35kg/m
3~ 45kg/m
3;
The injection rate of described initiator solution is 0.5m
3~ 1.8m
3;
Step 303, according to the method described in step 102 to step 104, by first to after complete spacer slug, trigger agent slug and displacement fluid slug process;
Step 304, closing well: by target well (8) closing well 60h ~ 80h;
Step 305, opening well and making production.
6., according to Self-heating system injection technology chemical in thick oil reservoir according to claim 5, it is characterized in that: initator described in step 302 is ammonium persulfate or potassium peroxydisulfate.
7. according to Self-heating system injection technology chemical in thick oil reservoir according to claim 5, it is characterized in that: adopt cold mode or the heat extraction by steam injection mode of adopting when injecting chemical Self-heating system in the residing thick oil reservoir of target well (8), adopt Self-heating system injection device to inject;
Described Self-heating system injection device comprises four apparatus for combining liquids and a liquid injection pipe (14) be connected with the pit shaft of target well (8), the inlet of four described apparatus for combining liquids is connected with water injection equipment (1) respectively by a filling pipe, the liquid outlet of four described apparatus for combining liquids is connected with liquid injection pipe (14) respectively by a liquid-transport pipe-line, described liquid injection pipe (14) is equipped with plunger displacement pump (7), pressure sensing cell and the 5th one way valve (10-5); Each described filling pipe is all provided with flow control valve and flow detection unit, each described liquid-transport pipe-line is all provided with one way valve;
Four described apparatus for combining liquids comprise three liquid mixing pits and a liquid blending tank (5), all mixing plant are housed in described liquid blending tank (5) and three described liquid mixing pits; Three described liquid mixing pits be respectively to the suspension of heat generating agent described in step 101 carry out mix and blend first liquid mixing pit (2), to trigger described in step 103 agent solution carry out mix and blend second liquid mixing pit (3) and to the 3rd liquid mixing pit (4) carrying out mix and blend in step 102 with aqueous surfactant solution described in step 104; be connected to water injection equipment (1) and first liquid mixing pit (2), second liquid mixing pit (3), filling pipe between 3rd liquid mixing pit (4) and liquid blending tank (5) is respectively the first filling pipe, second filling pipe, 3rd filling pipe and the 4th filling pipe, the flow control valve that described first filling pipe is installed and flow detection unit are respectively first flow control valve (9-1) and first flow detecting unit (11-1), the flow control valve that described second filling pipe is installed and flow detection unit are respectively second control valve (9-2) and second amount detection unit (11-2), the flow control valve that described 3rd filling pipe is installed and flow detection unit are respectively the 3rd flow control valve (9-3) and the 3rd flow detection unit (11-3), the flow control valve that described 4th filling pipe is installed and flow detection unit are respectively the 4th flow control valve (9-4) and the 4th flow detection unit (11-4), the liquid-transport pipe-line that first liquid mixing pit (2), second liquid mixing pit (3), the 3rd liquid mixing pit (4) are connected with liquid blending tank (5) is respectively the first liquid-transport pipe-line, the second liquid-transport pipe-line, the 3rd liquid-transport pipe-line and the 4th liquid-transport pipe-line, and the one way valve that described first liquid-transport pipe-line, the second liquid-transport pipe-line, the 3rd liquid-transport pipe-line and the 4th liquid-transport pipe-line are installed is respectively the first one way valve (10-1), the second one way valve (10-2), the 3rd one way valve (10-3) and the 4th one way valve (10-4),
Before injecting described chemical Self-heating system, the one way valve that the flow control valve that described 5th one way valve (10-5), each described filling pipe are installed and each described liquid-transport pipe-line are installed all is in closed condition.
8. according to Self-heating system injection technology chemical in thick oil reservoir according to claim 7, it is characterized in that: before carrying out heat generating agent slug in step 101, need first in described heat generating agent suspension, add thickener and stir, every 1m
3heat generating agent suspension adds 1.8g ~ 2.6g thickener; When carrying out heat generating agent slug in step 101, the heat generating agent suspension added after thickener is injected in the residing thick oil reservoir of target well (8);
Before injecting described chemical Self-heating system, first to the suspension of heat generating agent described in step 101, insulating liquid described in step 102, agent solution is triggered described in step 103, described in displacement fluid described in step 104 and step 302, the injection rate of initiator solution is determined respectively, and to the described heat generating agent suspension of preparation, described insulating liquid, described triggering agent solution, the water supply volume M1 of described displacement fluid and described initiator solution, M2, M3, M4 and M5 and described heat generating agent, described triggering agent, described surfactant, the consumption of described thickener and described initator is determined respectively, afterwards, described heat generating agent suspension, described triggering agent solution, described aqueous surfactant solution and described initiator solution are mixed respectively,
Wherein, when described heat generating agent suspension is mixed, open first flow control valve (9-1), by the first filling pipe to first liquid mixing pit (2) interior water filling and water injection rate is m1, wherein m1=(85% ~ 90%) × M1; After water filling completes, close first flow control valve (9-1); Again according to the consumption of the described thickener determined, described thickener to be added in first liquid mixing pit (2) and to stir; Afterwards, according to the consumption of the described heat generating agent determined, described heat generating agent to be added in first liquid mixing pit (2) and to stir, until institute adds heat generating agent be all in suspended state, obtaining the heat generating agent suspension after adding thickener;
When described triggering agent solution is mixed, open second control valve (9-2), by the second filling pipe to second liquid mixing pit (3) interior water filling and water injection rate is m2, wherein m2=(85% ~ 90%) × M3; After water filling completes, close second control valve (9-2); Again according to the consumption of the described triggering agent determined, described triggering agent to be added in second liquid mixing pit (3) and to stir, until institute adds and triggers agent and dissolve all completely, obtaining the triggering agent solution after dissolving;
When described aqueous surfactant solution is mixed, according to water supply volume M2 and the M4 of the described insulating liquid determined and described displacement fluid, open the 3rd flow control valve (9-3), by the 3rd filling pipe to the 3rd liquid mixing pit (4) interior water filling; After water filling completes, close the 3rd flow control valve (9-3); Again according to the consumption of the described surfactant determined, described surfactant to be added in the 3rd liquid mixing pit (4) and to stir, obtaining described aqueous surfactant solution;
When described initiator solution is mixed, open the 4th flow control valve (9-4), by the 4th filling pipe to liquid blending tank (5) interior water filling and water injection rate is m3, wherein m3=(85% ~ 90%) × M5; After water filling completes, close the 4th flow control valve (9-4); Again according to the consumption of the described initator determined, described initator to be added in liquid blending tank (5) and to stir, dissolving all completely until institute adds initator, obtain the initiator solution after dissolving;
After described heat generating agent suspension, described triggering agent solution, described aqueous surfactant solution and described initiator solution have all mixed, start plunger displacement pump (7) and injected described chemical Self-heating system; In described chemical Self-heating system injection process, described plunger displacement pump (7) continuous operation;
When carrying out heat generating agent slug in step 101, opening the first one way valve (10-1), injecting the residing thick oil reservoir of target well (8) by adding the heat generating agent suspension after thickener in first liquid mixing pit (2); When heat generating agent suspension after adding thickener in described first liquid mixing pit (2) is about to note, open first flow control valve (9-1), by the first filling pipe to first liquid mixing pit (2) interior water filling and water injection rate is m4, wherein m4=M1-m1; After water filling completes, close first flow control valve (9-1); All inject after the residing thick oil reservoir of target well (8) until institute's water filling in first liquid mixing pit (2), complete heat generating agent slug process;
When step 103 carries out triggering agent slug, open the second one way valve (10-2), the triggering agent solution after dissolving in second liquid mixing pit (3) is injected the residing thick oil reservoir of target well (8); When triggering agent solution after dissolving in described second liquid mixing pit (3) is about to note, open second control valve (9-2), by the second filling pipe to second liquid mixing pit (3) interior water filling and water injection rate is m5, wherein m5=M3-m2; After water filling completes, close second control valve (9-2); All inject after the residing thick oil reservoir of target well (8) until institute's water filling in second liquid mixing pit (3), complete and trigger agent slug process;
When carrying out initator slug in step 302, open the 4th one way valve (10-4), the initiator solution after dissolving in liquid blending tank (5) is injected the residing thick oil reservoir of target well (8); When initiator solution after dissolving in described liquid blending tank (5) is about to note, open the 4th flow control valve (9-4), by the 4th filling pipe to liquid blending tank (5) interior water filling and water injection rate is m6, wherein m6=M5-m3; After water filling completes, close second control valve (9-2); All inject after the residing thick oil reservoir of target well (8) until institute's water filling in liquid blending tank (5), complete initator slug process.
9. a chemical Self-heating system injection technology injection device as claimed in claim 1, it is characterized in that: comprise four apparatus for combining liquids and a liquid injection pipe (14) be connected with the pit shaft of target well (8), the inlet of four described apparatus for combining liquids is connected with water injection equipment (1) respectively by a filling pipe, the liquid outlet of four described apparatus for combining liquids is connected with liquid injection pipe (14) respectively by a liquid-transport pipe-line, plunger displacement pump (7) described liquid injection pipe (14) is equipped with, pressure sensing cell and the 5th one way valve (10-5), each described filling pipe is all provided with flow control valve and flow detection unit, each described liquid-transport pipe-line is all provided with one way valve,
Four described apparatus for combining liquids comprise three liquid mixing pits and a liquid blending tank (5), all mixing plant are housed in described liquid blending tank (5) and three described liquid mixing pits; Three described liquid mixing pits be respectively to the suspension of heat generating agent described in step 101 carry out mix and blend first liquid mixing pit (2), to trigger described in step 103 agent solution carry out mix and blend second liquid mixing pit (3) and to the 3rd liquid mixing pit (4) carrying out mix and blend in step 102 with aqueous surfactant solution described in step 104; be connected to water injection equipment (1) and first liquid mixing pit (2), second liquid mixing pit (3), filling pipe between 3rd liquid mixing pit (4) and liquid blending tank (5) is respectively the first filling pipe, second filling pipe, 3rd filling pipe and the 4th filling pipe, the flow control valve that described first filling pipe is installed and flow detection unit are respectively first flow control valve (9-1) and first flow detecting unit (11-1), the flow control valve that described second filling pipe is installed and flow detection unit are respectively second control valve (9-2) and second amount detection unit (11-2), the flow control valve that described 3rd filling pipe is installed and flow detection unit are respectively the 3rd flow control valve (9-3) and the 3rd flow detection unit (11-3), the flow control valve that described 4th filling pipe is installed and flow detection unit are respectively the 4th flow control valve (9-4) and the 4th flow detection unit (11-4), the liquid-transport pipe-line that first liquid mixing pit (2), second liquid mixing pit (3), the 3rd liquid mixing pit (4) are connected with liquid blending tank (5) is respectively the first liquid-transport pipe-line, the second liquid-transport pipe-line, the 3rd liquid-transport pipe-line and the 4th liquid-transport pipe-line, and the one way valve that described first liquid-transport pipe-line, the second liquid-transport pipe-line, the 3rd liquid-transport pipe-line and the 4th liquid-transport pipe-line are installed is respectively the first one way valve (10-1), the second one way valve (10-2), the 3rd one way valve (10-3) and the 4th one way valve (10-4).
10. according to injection device according to claim 9, it is characterized in that: also comprise the first current divider (13) and the second current divider (6), described first current divider (13) is identical with the structure of the second current divider (6) and the two includes first inlet/outlet and multiple second inlet/outlet; The delivery port of described water injection equipment (1) is connected by first inlet/outlet of connecting pipe with the first current divider (13), and four described second inlet/outlets of described first current divider (13) are connected with the inlet of four described apparatus for combining liquids with the 4th filling pipe respectively by the first filling pipe, the second filling pipe, the 3rd filling pipe; The liquid outlet of four described apparatus for combining liquids is connected with four described second inlet/outlets of the second current divider (6) respectively by the first liquid-transport pipe-line, the second liquid-transport pipe-line, the 3rd liquid-transport pipe-line and the 4th liquid-transport pipe-line, and the first inlet/outlet of described second current divider (6) is connected with liquid injection pipe (14).
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105863593A (en) * | 2016-04-25 | 2016-08-17 | 中国石油集团渤海钻探工程有限公司 | Unconventional oil and gas environment-friendly exploiting device and method |
| CN109577935A (en) * | 2019-01-08 | 2019-04-05 | 中国石油天然气股份有限公司 | Water flooding fire flooding oil reservoir combustion-supporting profile control process |
| CN109779589A (en) * | 2017-11-13 | 2019-05-21 | 中国石油天然气股份有限公司 | Reservoir transformation method for igneous rock thick oil reservoir |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4498537A (en) * | 1981-02-06 | 1985-02-12 | Mobil Oil Corporation | Producing well stimulation method - combination of thermal and solvent |
| US4706751A (en) * | 1986-01-31 | 1987-11-17 | S-Cal Research Corp. | Heavy oil recovery process |
| US20060032630A1 (en) * | 1999-05-07 | 2006-02-16 | Ge Ionics, Inc. | Water treatment method for heavy oil production |
| CN101004132A (en) * | 2007-01-04 | 2007-07-25 | 中国石油大学(华东) | Exploitation technique for disgorging thick oil by pouring air to assistant steam |
| CN101839127A (en) * | 2010-04-12 | 2010-09-22 | 北京东方亚洲石油技术服务有限公司 | Exploitation method of thick oil type oil deposit |
| CN103147732A (en) * | 2012-12-28 | 2013-06-12 | 中国石油天然气股份有限公司 | Medium-low temperature controllable self-heating method under heavy oil and super heavy oil reservoir conditions |
| CN104073233A (en) * | 2014-07-23 | 2014-10-01 | 中国石油大学(华东) | Self-heat generation chemical temperature rise agent for alkaline thickened oil reservoir and use method |
| CN104087279A (en) * | 2014-07-23 | 2014-10-08 | 中国石油大学(华东) | Self thermogenesis chemical temperature raising agent for acid thick oil reservoir and use method of agent |
-
2015
- 2015-07-17 CN CN201510420011.XA patent/CN105089592B/en not_active Expired - Fee Related
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4498537A (en) * | 1981-02-06 | 1985-02-12 | Mobil Oil Corporation | Producing well stimulation method - combination of thermal and solvent |
| US4706751A (en) * | 1986-01-31 | 1987-11-17 | S-Cal Research Corp. | Heavy oil recovery process |
| US20060032630A1 (en) * | 1999-05-07 | 2006-02-16 | Ge Ionics, Inc. | Water treatment method for heavy oil production |
| CN101004132A (en) * | 2007-01-04 | 2007-07-25 | 中国石油大学(华东) | Exploitation technique for disgorging thick oil by pouring air to assistant steam |
| CN101839127A (en) * | 2010-04-12 | 2010-09-22 | 北京东方亚洲石油技术服务有限公司 | Exploitation method of thick oil type oil deposit |
| CN103147732A (en) * | 2012-12-28 | 2013-06-12 | 中国石油天然气股份有限公司 | Medium-low temperature controllable self-heating method under heavy oil and super heavy oil reservoir conditions |
| CN104073233A (en) * | 2014-07-23 | 2014-10-01 | 中国石油大学(华东) | Self-heat generation chemical temperature rise agent for alkaline thickened oil reservoir and use method |
| CN104087279A (en) * | 2014-07-23 | 2014-10-08 | 中国石油大学(华东) | Self thermogenesis chemical temperature raising agent for acid thick oil reservoir and use method of agent |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105863593A (en) * | 2016-04-25 | 2016-08-17 | 中国石油集团渤海钻探工程有限公司 | Unconventional oil and gas environment-friendly exploiting device and method |
| CN109779589A (en) * | 2017-11-13 | 2019-05-21 | 中国石油天然气股份有限公司 | Reservoir transformation method for igneous rock thick oil reservoir |
| CN109779589B (en) * | 2017-11-13 | 2021-01-29 | 中国石油天然气股份有限公司 | Reservoir transformation method for igneous rock thick oil reservoir |
| CN109577935A (en) * | 2019-01-08 | 2019-04-05 | 中国石油天然气股份有限公司 | Water flooding fire flooding oil reservoir combustion-supporting profile control process |
| CN109577935B (en) * | 2019-01-08 | 2020-12-01 | 中国石油天然气股份有限公司 | Water flooding fire flooding oil reservoir combustion-supporting profile control process |
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|---|---|
| CN105089592B (en) | 2017-07-28 |
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