CN102533240B - High-temperature oil reservoir composite modifying and flooding agent and preparing method and application thereof - Google Patents
High-temperature oil reservoir composite modifying and flooding agent and preparing method and application thereof Download PDFInfo
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Abstract
The invention discloses a high-temperature oil reservoir composite modifying and flooding agent, which contains polymer polyacrylamide and cross-linking agents with proportion of weight parts as (1-6):1. The high-temperature oil reservoir composite modifying and flooding agent is developed mainly aiming at high-temperature oil reservoirs (70-125 DEG C) and is mainly used for the deep portion profile control and fluid deep portion steering technology. Under high-temperature conditions, the high-temperature oil reservoir composite modifying and flooding agent is high in reaction activity, low in use concentration, non-toxic and odorless and easy to operate, and has no harm on the environment and the staff. The high-temperature oil reservoir composite modifying and flooding agent is used in deep portion profile control and profile flooding construction and widely applied in Tuba oil fields and Jilin oil fields, and input-output ratio reaches 1:3.6. Through continuous research on deepening oil reservoir understanding, optimizing construction processes and pump injection procedures and controlling injection radiuses, the high-temperature oil reservoir composite modifying and flooding agent can be widely applied to the high-temperature oil reservoir aspect.
Description
Technical field
The present invention relates to a kind of Oilfield Chemicals and its preparation method and application, particularly a kind of high temperature modification linking agent and its preparation method and application, belongs to oilfield exploitation field.
Background technology
In recent years, the deep transfer drive technical development that is applied to middle low-temperature reservoir (70 ℃ following) obtains very fast, and is widely applied in oil field.But the dark conditioning technology development that is applied to high-temperature oil reservoir (more than 70 ℃) is relatively slow, this be mainly due to high temperature polymer and high-temperature cross-linking agent production development slower, therefore restricted the development of the deep transfer drive technology of high-temperature oil reservoir (more than 70 ℃).At present, larger phenolic crosslinkers and the lower surrogate of some toxicity of the toxicity fifties still used in many oil fields.Although phenolic system can be used for high-temperature oil reservoir environment, but because chemical agent volatility is serious, environment and operator are had a strong impact on, and response capacity is low, using dosage is large, national environmental protection department clearly forbids using phenolic aldehyde material in injected water, therefore, need a kind of substitute products of non-toxic inexpensive, can form good thermal stability with multipolymer, visco-elasticity meets the requirement that necessarily required gelinite meets high-temperature oil reservoir profile control transfer drive.
The most of oil field of China adopts waterflooding pattern, along with oil-field development exploitation enters middle high water-cut stage, improves injectability, improves development effectiveness and be one of urgent task that these oil fields face.Because chemical profile control transfer drive technological adaptability is wide, flexible operation, with low cost, be the prefered method that current oilfield stimulation is taped the latent power.Oil reservoir deep profile controlling transfer drive technology is effective one of the water driving technology that improves growing up on conventional profile control and extensive polymer flooding basis, it can effectively adjust oil reservoir intake profile and plane wave and efficiency, success ratio is high, is the developing direction of improving in recent years water driving technology.Oil deposit deep part transfer drive technology is different from polymer flooding and profile control technique to the requirement of chemical agent, requires the cross-linking system using should have certain gel-formation power, also will have certain flow capacity, and have good adaptability under differing temps and salinity condition.For telling, breathe out the most of oil reservoir temperature in oil field in the temperature regime of 70-90 ℃, must have the gelinite that adapts to this oil reservoir system to reach the linking agent of dark tune, volume increase object.
Summary of the invention
The object of the invention is the problem existing for above prior art, a kind of high-temperature oil reservoir deep compound displacement agent its preparation method and application thereof are provided, adjusting driving agnet viscosity of the present invention is high, gelation time is long and adjustable, suitable chemical transfer drive, the profile control of carrying out in high-temperature oil reservoir, and oil displacement efficiency is good, oil displacement efficiency is high.
For realizing object of the present invention, one aspect of the present invention provides the compound displacement agent of a kind of high-temperature oil reservoir deep, comprises polymer poly acrylamide and linking agent, and wherein the weight part proportioning of polyacrylamide and linking agent is 1-6: 1.
Wherein, the weight part proportioning of described polyacrylamide and linking agent is 1-4: 1, be preferably 2-4: and 1, more preferably 2: 1.
Particularly, the step that described linking agent carries out is in the following order prepared from:
1) according to following weight part proportioning, prepare raw material
Phenol 2-4, vulkacit H 1-3, formaldehyde 1-3, solidifying agent 1-3, catalyzer 0.5-1.5
2) described raw material is added to reactor, after mixing, heating, is at 60-100 ℃, to carry out polyreaction keeping temperature, obtains.
Wherein, the weight part proportioning of raw material step 1) is: phenol 2.5-3.5, vulkacit H 1.5-2.5, formaldehyde 1.5-2.5, solidifying agent 1.5-2.5, catalyzer 0.75-1.25, be preferably phenol 3, vulkacit H 2, formaldehyde 2, solidifying agent 2, catalyzer 1.
Particularly, described solidifying agent is one or more in diethylenetriamine, triethylene tetramine, vinyl triamine or ammonium chloride, is preferably ammonium chloride; Described catalyzer is sodium hydroxide or potassium hydroxide, is preferably sodium hydroxide.
Particularly, described formaldehyde is that mass percent concentration is 37% industrial formaldehyde solution.
Wherein, step 2), temperature of reaction is preferably 80-90 ℃; The reaction times of described polyreaction is 2-3h, is preferably 2.5h.
The present invention provides the preparation method of a kind of high-temperature oil reservoir deep compound displacement agent on the other hand, it is characterized in that comprising as follows step in sequence:
1) polyacrylamide is water-soluble, be mixed with the polyacrylamide solution that concentration is 400-1500mg/L;
2) linking agent is mixed with water, be mixed with the cross-linking agent solution that concentration is 200-1000mg/L;
3) in polypropylene amine solution, add cross-linking agent solution, stir, obtain.
Wherein, step 1) described in, molecular weight >=1,200 ten thousand of polyacrylamide, are preferably 1200-1700 ten thousand, and more preferably 1,200 ten thousand; The concentration of described polyacrylamide solution is 800-1200mg/L, is preferably 1000mg/L.
Particularly, the concentration of described polyacrylamide solution is 400-1500mg/L, is that the weight of the polyacrylamide that adds in every 1L water is 400-1500mg, and the weight that contains polyacrylamide in every 1L water is 400-1500mg.
Wherein, the step that step 2), linking agent carries out is in the following order prepared from:
2-1) according to following weight part proportioning, prepare raw material
Phenol 2-4, vulkacit H 1-3, formaldehyde 1-3, solidifying agent 1-3, catalyzer 0.5-1.5
2-2) described raw material is added to reactor, after mixing, heating, is at 60-100 ℃, to carry out polyreaction keeping temperature, obtains.
Particularly, step 2-1) the weight part proportioning of described raw material is: phenol 2.5-3.5, vulkacit H 1.5-2.5, formaldehyde 1.5-2.5, solidifying agent 1.5-2.5, catalyzer 0.75-1.25, be preferably phenol 3, vulkacit H 2, formaldehyde 2, solidifying agent 2, catalyzer 1.
Especially, described solidifying agent is one or more in diethylenetriamine, triethylene tetramine, vinyl triamine or ammonium chloride, is preferably ammonium chloride; Described catalyzer is sodium hydroxide or potassium hydroxide, is preferably sodium hydroxide.
Particularly, step 2-2), temperature of reaction is preferably 80-90 ℃; The reaction times of described polyreaction is 2-3h, is preferably 2.5h.
Wherein, step 2) described in, the concentration of cross-linking agent solution is 200-1000mg/L, is that the weight of the linking agent that adds in every 1L water is 200-1000mg, and the weight that contains linking agent in every 1L water is 200-1000mg.
Wherein, step 2) described in, the concentration of cross-linking agent solution is 500-700mg/L, is preferably 600mg/L; Step 3) described in, in polyacrylamide solution, the weight part proportioning of the linking agent in polyacrylamide and cross-linking agent solution is 1-6: 1, be preferably 1-4: and 1, more preferably 24: 1, be further preferably 2: 1.
Another aspect of the present invention provides the application of a kind of above-mentioned high-temperature oil reservoir deep compound displacement agent in high-temperature oil reservoir chemical displacement of reservoir oil exploitation.
Compound displacement agent tool in high-temperature oil reservoir of the present invention deep has the following advantages:
1, the compound displacement agent of high-temperature oil reservoir of the present invention deep can be applicable to deep chemistry transfer drive, the profile control processing of high-temperature oil reservoir, and compound displacement agent is under hot conditions, and gel-forming property is good, stablizes, and being applicable to temperature is 70 ℃ of above high-temperature oil reservoir.
2, the compound displacement agent of high-temperature oil reservoir of the present invention deep is a kind of movable gel (being colloidal dispersed gel), gelation time is adjustable, can realize the dynamic plugging to down-hole High Permeability Interval, after plastic 2-5 days, can, for the high seepage channel in shutoff water filling stratum, play the object of steady oil control water; After plastic, viscosity increases gradually, and gelation time is long, prevents compound displacement agent block pumps and pipeline, has extended the validity period of compound displacement agent simultaneously.
3, high-temperature oil reservoir of the present invention deep compound displacement agent oil displacement efficiency is remarkable, and effect of field application is relatively good, and displacement oil recovery factor is high, has improved the recovery ratio in oil field, has changed the short defect of conventional adjusting driving agnet validity period.
4, the preparation technology of high-temperature oil reservoir of the present invention deep compound displacement agent is simple, easy to operate, sufficient raw, cheap, and the proportioning of linking agent and polyacrylamide is low, polymkeric substance is low with the ratio of linking agent solid content, can significantly reduce the use of chemical reagent, production cost is low, is suitable for applying.
5, the compound displacement agent of high-temperature oil reservoir of the present invention deep has no irritating odor, toxicity significantly reduces, and oilfield construction is used safety.
6, the compound displacement agent of high-temperature oil reservoir of the present invention deep is in oilfield chemistry transfer drive, profile control site operation process, and application is convenient, and construction is simple.
Accompanying drawing explanation
Fig. 1 is the chemical structural formula of main component in the compound displacement agent of high-temperature oil reservoir of the present invention deep.
Embodiment
It is raw material that phenol, vulkacit H, formaldehyde, catalyzer, solidifying agent are take in the present invention, in reactor, be heated to certain temperature, under the effect of catalyzer, carry out polyreaction, the High Temperature Pre aggressiveness mixture that generation contains hydroxyl phenol (as containing monohydroxy phenol, dihydric phenol performed polymer), be High Temperature Pre aggressiveness organic crosslinking agent mixture, that is to say and obtain High Temperature Pre aggressiveness linking agent.
High Temperature Pre aggressiveness linking agent prepared by the present invention and polyacrylamide effect, at a certain temperature, the plural gel body (as Fig. 1) that formation polyacrylamide-resol is main component, resol, the methylene base polyacrylamine gel of while generating portion, obtain the agent of polyhydroxy phenol high temperature compound displacement, i.e. high-temperature oil reservoir deep compound displacement agent.
Embodiment 1
One, prepare linking agent
1, according to following weight proportion, prepare raw material (* 10kg)
Phenol 3, vulkacit H 2, formaldehyde 2, solidifying agent 2, catalyzer 1
Wherein, formaldehyde is that mass percent concentration is 37% formaldehyde solution; Solidifying agent is ammonium chloride; Catalyzer is sodium hydroxide.
Raw material formaldehyde in the embodiment of the present invention is that mass percent concentration is 37% industrial formaldehyde solution; Solidifying agent adopts ammonium chloride, and other are also applicable to the present invention as diethylenetriamine, triethylene tetramine, vinyl triamine; Catalyzer adopts sodium hydroxide, and other are also applicable to the present invention as potassium hydroxide.
2, above-mentioned raw materials is joined in reactor together, mix, heat and make temperature remain 85 ± 5 ℃, at this temperature, carry out polyreaction.
3, after reaction 2.5h, reaction mixture is cooled to normal temperature (25 ℃), obtain performed polymer linking agent (being poly-hydroxy phenols linking agent for the transfer drive of high-temperature oil reservoir deep).
Two, prepare adjusting driving agnet
1, clear water is mixed with polyacrylamide, be mixed with the polyacrylamide solution that concentration is 1000mg/L, be in every 1L clear water, to add the polyacrylamide of 1000mg, that is to say, the weight that contains polyacrylamide in every 1L clear water is 1000mg, wherein, the molecular weight of polyacrylamide is 1,200 ten thousand;
2, to high-temperature oil reservoir deep transfer drive with adding clear water in poly-hydroxy phenols linking agent, mix, be mixed with the cross-linking agent solution that concentration is 600mg/L, be the performed polymer linking agent that adds the step () of 600mg to prepare in every 1L clear water, the weight that is to say performed polymer linking agent in every 1L clear water is 600mg;
3, polyacrylamide solution is mixed and be get final product with cross-linking agent solution, wherein, in the polyacrylamide in control polyacrylamide solution and cross-linking agent solution, the weight proportion of linking agent is 2: 1.
Embodiment 2
One, synthetic cross-linking agent
1, according to following weight proportion, prepare raw material (* 10kg)
Phenol 2.5, vulkacit H 2.5, formaldehyde 1.5, solidifying agent 1.5, catalyzer 0.75
2, above-mentioned raw materials is joined in reactor together, mix, heat and make temperature remain 95 ± 5 ℃, at this temperature, carry out polyreaction.
3, after reaction 2h, reaction mixture is cooled to normal temperature (25 ℃), obtain.
Two, prepare adjusting driving agnet
1, clear water is mixed with polyacrylamide, be mixed with the polyacrylamide solution that concentration is 800mg/L, be in every 1L clear water, to add the polyacrylamide of 800mg, that is to say, the weight that contains polyacrylamide in every 1L clear water is 800mg, wherein, the molecular weight of polyacrylamide is 1,200 ten thousand;
2, to high-temperature oil reservoir deep transfer drive with adding clear water in poly-hydroxy phenols linking agent, mix, be mixed with the cross-linking agent solution that concentration is 700mg/L, be the performed polymer linking agent that adds the step () of 700mg to prepare in every 1L clear water, the weight that is to say performed polymer linking agent in every 1L clear water is 700mg;
3, polyacrylamide solution is mixed and be get final product with cross-linking agent solution, wherein, in the polyacrylamide in polyacrylamide solution and cross-linking agent solution, the weight proportion of linking agent is 4: 1.
Embodiment 3
One, synthetic cross-linking agent
1, according to following weight proportion, prepare raw material (* 10kg)
Phenol 3.5, vulkacit H 1.5, formaldehyde 2.5, solidifying agent 2.5, catalyzer 1.25
2, above-mentioned raw materials is joined in reactor together, mix, heat and make temperature remain 80 ± 5 ℃, at this temperature, carry out polyreaction.
3, after reaction 3h, reaction mixture is cooled to normal temperature (25 ℃), obtain.
Two, prepare adjusting driving agnet
1, clear water is mixed with polyacrylamide, be mixed with the polyacrylamide solution that concentration is 1200mg/L, be in every 1L clear water, to add the polyacrylamide of 1200mg, that is to say, the weight that contains polyacrylamide in every 1L clear water is 1200mg, wherein, the molecular weight of polyacrylamide is 1,200 ten thousand;
2, to high-temperature oil reservoir deep transfer drive with adding clear water in poly-hydroxy phenols linking agent, mix, be mixed with the cross-linking agent solution that concentration is 500mg/L, be the performed polymer linking agent that adds the step () of 500mg to prepare in every 1L clear water, the weight that is to say performed polymer linking agent in every 1L clear water is 500mg;
3, polyacrylamide solution is mixed and be get final product with cross-linking agent solution, wherein, in the polyacrylamide in polyacrylamide solution and cross-linking agent solution, the weight proportion of linking agent is 2: 1.
Embodiment 4
One, synthetic cross-linking agent
1, according to following weight proportion, prepare raw material (* 10kg)
Phenol 2, vulkacit H 1, formaldehyde 3, solidifying agent 1, catalyzer 0.5
2, above-mentioned raw materials is joined in reactor together, mix, heat and make temperature remain 90 ± 5 ℃, at this temperature, carry out polyreaction.
3, after reaction 2.5h, reaction mixture is cooled to normal temperature (25 ℃), obtain.
Two, preparation high-temperature oil reservoir deep adjusting driving agnet
1, clear water is mixed with polyacrylamide, be mixed with the polyacrylamide solution that concentration is 400mg/L, be in every 1L clear water, to add the polyacrylamide of 400mg, that is to say, the weight that contains polyacrylamide in every 1L clear water is 400mg, wherein, the molecular weight of polyacrylamide is 1,700 ten thousand;
2, to high-temperature oil reservoir deep transfer drive with adding clear water in poly-hydroxy phenols linking agent, mix, be mixed with the cross-linking agent solution that concentration is 1000mg/L, be the performed polymer linking agent that adds the step () of 1000mg to prepare in every 1L clear water, the weight that is to say performed polymer linking agent in every 1L clear water is 1000mg;
3, polyacrylamide solution is mixed and be get final product with cross-linking agent solution, wherein, in the polyacrylamide in polyacrylamide solution and cross-linking agent solution, the weight proportion of linking agent is 6: 1.
Embodiment 5
One, synthetic cross-linking agent
1, according to following weight proportion, prepare raw material (* 10kg)
Phenol 4, vulkacit H 3, formaldehyde 1, solidifying agent 3, catalyzer 1.5
2, above-mentioned raw materials is joined in reactor together, mix, heat and make temperature remain 65 ± 5 ℃, at this temperature, carry out polyreaction.
3, after reaction 3h, reaction mixture is cooled to normal temperature (25 ℃), obtain.
Two, prepare adjusting driving agnet
1, clear water is mixed with polyacrylamide, be mixed with the polyacrylamide solution that concentration is 1500mg/L, be in every 1L clear water, to add the polyacrylamide of 1500mg, that is to say, the weight that contains polyacrylamide in every 1L clear water is 1500mg, wherein, the molecular weight of polyacrylamide is 1,200 ten thousand;
2, to high-temperature oil reservoir deep transfer drive with adding clear water in poly-hydroxy phenols linking agent, mix, be mixed with the cross-linking agent solution that concentration is 200mg/L, be the performed polymer linking agent that adds the step () of 200mg to prepare in every 1L clear water, the weight that is to say performed polymer linking agent in every 1L clear water is 200mg;
3, polyacrylamide solution is mixed and be get final product with cross-linking agent solution, wherein, in the polyacrylamide in polyacrylamide solution and cross-linking agent solution, the weight proportion of linking agent is 1: 1.
1 one-tenth colloidality viscosity test of test example
It is in 80 ℃ of baking ovens that adjusting driving agnet prepared by embodiment 1-5 is put in respectively temperature, its viscosity number of different time sampling and measuring, to investigate adjusting driving agnet gel-forming property in different time, wherein adopt Brookfield viscometer under 6rpm condition, to measure the viscosity of adjusting driving agnet, measurement result is as shown in table 1.
Table 1 adjusting driving agnet gel-forming property viscosity changes
The viscosity test result of adjusting driving agnet gel-forming property shows:
1, the compound displacement agent of high-temperature oil reservoir of the present invention deep can be applicable to deep chemistry transfer drive, the profile control processing of high-temperature oil reservoir, and compound displacement agent is under hot conditions, and gel-forming property is good, stablizes, and being applicable to temperature is 70 ℃ of above high-temperature oil reservoir.
2, the high-temperature oil reservoir deep compound displacement agent that prepared by the present invention is a kind of novel movable gel (being colloidal dispersed gel), the dynamic plugging of realization to down-hole High Permeability Interval, change the short defect of conventional adjusting driving agnet validity period, adopted compound displacement agent of the present invention to carry out a kind of method that displacement crude oil is novel raising recovery ratio.
3, the high-temperature oil reservoir deep compound displacement agent gelation time that prepared by the present invention is adjustable, after plastic 2-5 days, can, for the high seepage channel in shutoff water filling stratum, play the object of steady oil control water; After plastic, viscosity increases gradually, and gelation time is long, prevents compound displacement agent block pumps and pipeline, has extended the validity period of compound displacement agent simultaneously.
4, high-temperature oil reservoir of the present invention deep compound displacement agent displacement viscosity is high, and environmental resistance is good, can effectively stop up macropore and string layer.
The pH that does not need to control solution when 5, prepared by the compound displacement agent of high-temperature oil reservoir of the present invention deep, during preparation, ground viscosity is lower than 100mPa.S, and the compound displacement agent at preparation initial stage has higher mobility, easily flows, easily, under Injection Well, be suitable on a large scale, inject for a long time.
6, the polymkeric substance of high-temperature oil reservoir deep compound displacement agent and the proportioning of linking agent that prepared by the present invention are low, and polymkeric substance is low with the ratio of linking agent solid content, can significantly reduce the use of chemical reagent, has reduced production cost.
The two-tube non-homogeneous model test of test example 2 (being the adjusting driving agnet system thing mould research of high-temperature oil reservoir deep)
Simulation Lu Keqin oil field, Xinjiang permeability variation situation, adopts parallel two-tube (diameter is that 5cm, length are 87.21cm) heterogeneous body sand-packed model to carry out oil displacement test, to investigate high-temperature oil reservoir deep compound displacement agent oil displacement efficiency under static conditions.The rate of permeation of high permeability model is 550-600 * 10
-3μ m
2; The rate of permeation of low permeability model is 40-50 * 10
-3μ m
2, permeability grade is 11-15 times.
High-temperature oil reservoir deep compound displacement agent prepared by the embodiment 1-5 of usining respectively and the polymer poly acrylamide soln of reference examples 1-5 carry out oil displacement test as the adjusting driving agnet of the polymer flooding of two-tube non-homogeneous model test.
Testing sequence is as follows:
1) single tube is tested to rate of permeation with clear water respectively;
2) single tube is vacuumized respectively to the rear saturated Shandong gram crude oil that oozes, wherein, the density of ground crude oil is 0.8878g/cm
3, viscosity is 255.4mPa.s;
3) after two-tube parallel connection, carry out water drive crude oil, water drive reaches 98% to moisture simultaneously, and water drive oil recovery factor is as table 2;
4) then carry out compound displacement agent displacement of reservoir oil test simultaneously, wherein, 0.2 times (0.2pv) that the amount of the compound displacement agent of injection is volume of voids, the recovery ratio after compound displacement is as shown in table 2.
The measurement result of two-tube non-homogeneous model test is as shown in table 2.
The movable gel of the two-tube parallel model of table 2 drives effect (experimental temperature 75 ' C)
The pore volume injected of PV---core
Experimental result shows:
1, the high-temperature oil reservoir deep compound displacement agent that prepared by employing the present invention is displacement crude oil effectively, and displacement is respond well, has improved recovery ratio, and average recovery ratio has improved more than 8.5%, reaches 8.5-17.6%.
2, the high-temperature oil reservoir deep compound displacement agent that prepared by the present invention is strong compared with the startup ability of polymer flooding to the startup ability of the irreducible oil of the low-permeability layer of non-homogeneous pay, improved profit mobility ratio, the recovery ratio that has improved low permeability layer, recovery ratio has improved 11.3-18.9%.
3, the flow that rear high and low infiltration layer is driven in the high-temperature oil reservoir deep compound displacement agent that prepared by the present invention has obvious variation, and low-permeability layer flow has raising by a relatively large margin, makes the reserves of low permeability layer obtain obvious startup.
Test example 3 oil field transfer drive researchs
The compound displacement agent that adopts high-temperature oil reservoir of the present invention deep transfer drive linking agent and polymkeric substance to prepare is mainly used in water injection well chemical profile control (driving) in high-temperature oil reservoir, reduce high water-intake interval water regain, improve water injection pressure, make middle low permeability layer water suction, improve in profile-log of water injection or plane and stop up high seepage channel, improve injected water swept volume, improve water drive situation, and then improve individual well or well group output, reduce moisture.
One, rig-site utilization
1, select well
Actual according to geology and production, select jade east 201-X, beautiful eastern 204-19, jade east 203, the beautiful eastern 2-42 well in Ke Qin oil field, Shandong to carry out Oil Field transfer drive profile control test in 2009-2010 year, wherein, the reservoir temperature of oil well is 70 ℃～125 ℃; Reservoir Permeability is 20～3000 * 10-3um
2; Water source is oil field clear water or sewage, the moisture 70-90% of four-hole well.
2, construction
The clear and definite decreasing water cut and increasing oil objects of factor such as, water breakthrough direction moisture according to tracer agent, well group;
According to factor deterministics such as waterflood front, water-flushed zone scope, well spacing, section development degrees, adjust radius, the compound displacement agent consumption simultaneously injecting with reference to effective water sucting thickness, adjusting driving agnet character calculative determination, wherein, be chosen in jade east 201-X, the beautiful eastern 204-19 in the same area, beautiful east 203, beautiful eastern 2-42 well, its compound displacement agent consumption is respectively 4160m
3, 5970m
3, 7500m
3, 3000m
3.
The injection that anyization adjusted all should be below formation-parting pressure, considers that interlayer trigger pressure difference determines the injection pressure gradient of zone of interest simultaneously, and then extrapolates injection pressure.Injection pressure gradient, liquid column hydrostatic pressure, zone of interest trigger pressure and water injectivity index are calculated the operation pressure of setting under discharge capacity.
In test example of the present invention, according to the reservoir situation of the eastern 201-X of jade, beautiful eastern 204-19, beautiful east 203, beautiful eastern 2-42 well group, determine that it is 74-160m that individual well injects intensity
3/ m, average individual well injects intensity 122m
3/ m, controls injection speed near the injection speed of each individual well injection allocation, and control of injection pressure is below waterflood system pressure, and operating tool string is blank tubing list note zone of interest, adopts the design of injection slug to carry out transfer drive construction, and slug design is as shown in table 3:
The design of table 3 slug is as follows
Specific as follows:
1) frontal slug: inject low viscous polyacrylamide solution (i.e. the polyacrylamide of low base fluid viscosity) to down-hole, injection radius is 2-4m, and Main Function is to push local water open, plays buffer action, the validity of protection main body slug;
2) main body slug: according to initial injection pressure, the order raising gradually according to viscosity is injected low viscosity, medium viscosity, the compound adjusting driving agnet of high viscosity, indepth plugging water breakthrough direction successively to down-hole.Beautiful eastern 201-X, beautiful eastern 204-19, beautiful east 203, beautiful eastern 2-42 well main body slug stage adjusting driving agnet behaviour in service are as table 4:
Table 4 Huas is adjusted well main body slug, trailing edge slug construction table
3) trailing edge slug: inject the compound adjusting driving agnet of high viscosity to down-hole, protection shutoff slug is not washed open by follow-up filling liquid, integrity and the resistance to erosion ability of protection main body block section;
4) replace slug: to down-hole, inject displacing liquid, replace the compound adjusting driving agnet of high viscosity that trailing edge slug step is injected, cross the area replacing to apart from well radius >=3m, displacing liquid is the polyacrylamide solution of high base fluid viscosity, i.e. full-bodied polyacrylamide solution.
3, construction effect (well group effect)
The compound displacement agent that polyhydroxy phenol type high temp performed polymer organic crosslinking agent prepared by employing the present invention and polymer poly acrylamide soln are mixed with is applicable to Ke Qin oil field, Shandong transfer drive, profile control, the change of composite slug adjusts mode effect better, oil and water well end is efficient is 100%, changes and adjusts well injection side Construction Condition as shown in table 5; After construction, oil well effect is as shown in table 6.
Table 5 Huas is adjusted well injection side Construction Gereral Situation table
PI value---pressure drop index, the reaction degree that wellhead pressure declines within the shut-in time, the while also represents the landing degree of reservoir pressure, the necessity of judgement individual well profile control, numerical value is less, illustrates that current reservoir pressure declines severe, it is strong that water filling breaks through degree, so the necessity of profile control is just larger.
The table 6 oil well effect summary sheet that takes effect
Economic and Efficiency Analysis: the 4 mouthfuls of wells of constructing, change adjustment expense and construction cost, 3,780,000 yuan of Meteorologicals; Increase oily 2830t, fall liquid 2800m
3, 1,358 ten thousand yuan of output expenses, input-output ratio 1: 3.6.
Claims (7)
1. a high-temperature oil reservoir compound displacement agent, comprises polyacrylamide polymers and linking agent, and wherein the weight part proportioning of polyacrylamide and linking agent is 1-6:1, it is characterized in that the step that described linking agent carries out is in the following order prepared from:
1) according to following weight part proportioning, prepare raw material, comprising:
Phenol 2-4, vulkacit H 1-3, formaldehyde 1-3, solidifying agent 1-3, catalyzer 0.5-1.5, wherein said solidifying agent is one or more in diethylenetriamine, triethylene tetramine, vinyl triamine or ammonium chloride, wherein, described catalyzer is sodium hydroxide or potassium hydroxide;
2) described raw material is added to reactor, after mixing, polyreaction is carried out in heating at the temperature of 60-100 ℃, obtains.
2. compound displacement agent as claimed in claim 1, is characterized in that the weight part proportioning of raw material described in step 1) is: phenol 2.5-3.5, vulkacit H 1.5-2.5, formaldehyde 1.5-2.5, solidifying agent 1.5-2.5, catalyzer 0.75-1.25.
3. compound displacement agent as claimed in claim 1 or 2, is characterized in that step 2) described in temperature of reaction be 80-90 ℃.
4. compound displacement agent as claimed in claim 1 or 2, is characterized in that step 2) described in reaction times of polyreaction be 2-3h.
5. a preparation method for high-temperature oil reservoir compound displacement agent, is characterized in that comprising as follows step in sequence:
1) polyacrylamide is water-soluble, be mixed with the polyacrylamide solution that concentration is 400-1500mg/L;
2) linking agent is mixed with water, be mixed with the cross-linking agent solution that concentration is 200-1000mg/L, wherein, the step that described linking agent carries out is in the following order prepared from:
2-1) according to following weight part proportioning, prepare raw material, comprise phenol 2-4, vulkacit H 1-3, formaldehyde 1-3, solidifying agent 1-3, catalyzer 0.5-1.5, wherein, described solidifying agent is one or more in diethylenetriamine, triethylene tetramine, vinyl triamine or ammonium chloride;
2-2) described raw material is added to reactor, after mixing, polyreaction is carried out in heating at the temperature of 60-100 ℃;
3) in polypropylene amine solution, add cross-linking agent solution, stir, obtain, the weight part proportioning of the linking agent in wherein said polyacrylamide solution in polyacrylamide and cross-linking agent solution is 1-6:1.
6. preparation method as claimed in claim 5, is characterized in that the molecular weight >1200 ten thousand of polyacrylamide described in step 1).
7. the application of high-temperature oil reservoir compound displacement agent in high-temperature oil reservoir chemical displacement of reservoir oil exploitation as claimed in claim 1 or 2.
Priority Applications (1)
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| CN201110336846.9A CN102533240B (en) | 2010-10-29 | 2011-10-28 | High-temperature oil reservoir composite modifying and flooding agent and preparing method and application thereof |
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| CN201110334720.8A Expired - Fee Related CN102558469B (en) | 2010-10-29 | 2011-10-28 | Cross-linking agent for profile control and oil displacement for high-temperature oil reservoir, as well as preparation method and application for same |
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| CN201110334720.8A Expired - Fee Related CN102558469B (en) | 2010-10-29 | 2011-10-28 | Cross-linking agent for profile control and oil displacement for high-temperature oil reservoir, as well as preparation method and application for same |
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| CN103214639A (en) * | 2013-04-24 | 2013-07-24 | 新疆华油技术服务股份有限公司 | Production method of water-soluble phenolic resin cross-linking agent used for water shut-off and profile control of oil field |
| CN105440233B (en) * | 2015-12-10 | 2017-09-01 | 中国石油天然气股份有限公司 | Fireflooding channeling sealing agent and preparation method thereof |
| CN106047324B (en) * | 2016-06-30 | 2018-12-21 | 中国石油大学(华东) | Reinforcing frozen glue dispersion in-depth profile control suitable for hyposmosis high temperature and high salt oil deposit |
| CN107384343B (en) * | 2017-06-27 | 2020-07-21 | 任丘市宏华兴化工有限公司 | High-temperature-resistant oil reservoir profile control water shutoff agent |
| CN110819334B (en) * | 2018-10-31 | 2021-08-20 | 中国石油大学(华东) | Skid-mounted jelly dispersion production device and application thereof |
| CN111205422B (en) * | 2018-11-22 | 2022-12-02 | 中国石油天然气股份有限公司 | Oily sludge plugging gel and preparation method and application thereof |
| CN113046043B (en) * | 2019-12-27 | 2022-11-04 | 中国石油天然气股份有限公司 | Oil reservoir reinjection water liquid preparation profile control and flooding agent, preparation method and application thereof |
| CN115261005A (en) * | 2021-04-30 | 2022-11-01 | 中国石油天然气股份有限公司 | Modifying and flooding agent and preparation method thereof |
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| CN101033392A (en) * | 2007-03-30 | 2007-09-12 | 盘锦市庆联油田工程技术服务有限公司 | Expansion type flow gel profile controlling water shutoff agent |
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| CN101033392A (en) * | 2007-03-30 | 2007-09-12 | 盘锦市庆联油田工程技术服务有限公司 | Expansion type flow gel profile controlling water shutoff agent |
Non-Patent Citations (2)
| Title |
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| 水溶性酚醛树脂作为水基聚合物凝胶交联剂的研究;黎钢等;《油田化学》;20001225;第17卷(第4期);第310-313页 * |
| 黎钢等.水溶性酚醛树脂作为水基聚合物凝胶交联剂的研究.《油田化学》.2000,第17卷(第4期),第310-313页. |
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| CN102533240A (en) | 2012-07-04 |
| CN102060966A (en) | 2011-05-18 |
| CN102558469A (en) | 2012-07-11 |
| CN102558469B (en) | 2014-05-07 |
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