CN103277077A - Filling and extraction system achieving fireflood auxiliary gravity oil drainage based on intelligent temperature control and filling and extraction method - Google Patents
Filling and extraction system achieving fireflood auxiliary gravity oil drainage based on intelligent temperature control and filling and extraction method Download PDFInfo
- Publication number
- CN103277077A CN103277077A CN201310205549XA CN201310205549A CN103277077A CN 103277077 A CN103277077 A CN 103277077A CN 201310205549X A CN201310205549X A CN 201310205549XA CN 201310205549 A CN201310205549 A CN 201310205549A CN 103277077 A CN103277077 A CN 103277077A
- Authority
- CN
- China
- Prior art keywords
- injection
- well
- temperature
- string
- gas
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Landscapes
- Road Paving Structures (AREA)
- Engine Equipment That Uses Special Cycles (AREA)
Abstract
The invention discloses a filling and extraction system achieving fireflood auxiliary gravity oil drainage based on intelligent temperature control and a filling and extraction method. According to the filling and extraction system, a filling pipe column, a monitoring pipe column and a production pipe column which are independent from one another are arranged in a production well, and an air filling well is provided with an air filling pipe column and an intelligent temperature control device used for intelligent regulation of the temperature of produced liquid. The filling pipe column is in serial connection with an insulated pipe, a sieve pipe and a guide cone, the monitoring pipe column is in serial connection with a monitoring pipe, the sieve pipe and the guide cone, the monitoring pipe is provided with a pressure measuring device, and the production pipe column is in serial connection with a hollow rod, an air-proof pump, a gas anchor, the sieve pipe and the guide cone. The intelligent temperature control device comprises multiple sets of temperature measurement devices arranged in the monitoring pipe column, a temperature measurement probe installed on a production pipeline on a wellhead, a data acquisition device arranged at a ground end, a control device connected with a data acquisition device and a temperature control actuating mechanism connected with the control device, wherein the temperature control actuating mechanism includes one of a filling pipeline communicated with the filling pipe column, an air filling pipeline communicated with the air filling pipe column and an electric heating device extending into the production pipe column.
Description
Technical field
The present invention relates to combustion in situ exploitation field, refer to a kind of fireflood assisted gravity drainage injection and extraction system based on intelligent temperature control especially and annotate mining method.
Background technology
The combustion in situ production technique is to utilize a part of heavy ingredient of crude oil in the oil reservoir to make fuel, constantly heat is given birth in burning, crude oil in the oil reservoir is displaced, have many advantages such as applied widely, that oil displacement efficiency is high, cost is low than other oil production methods, can become effective substituted technique of thickened oil recovery.The baked wheaten cake technology is applied to horizontal well, can reaches the effect of fireflood assisted gravity drainage.The stable propelling that typical characteristics are exactly that high temperature (the highest surpass 700 ℃), high gas-oil ratio (HGOR), production fluid range of temperature are big in the fireflood assisted gravity drainage manufacturing process, tubing string operation number of times directly influences the live wire leading edge in the manufacturing process, for the mid-deep strata heavy crude reservoir, these characteristics are especially big for the ordinary production influence of horizontal production well.Wherein high gas-oil ratio (HGOR) refers to that the ratio regular meeting of lighter hydrocarbons in the crude oil, steam and fluid significantly rises because of combustion in situ, after a large amount of gases enter pump, because the compressibility of gas reduces pump efficiency, to a certain degree the time, can cause pump can't extract fluid out when large-minded.
Fireflood flow string structure commonly used is single, mainly is to take over control air pump by oil pipe string to be connected in series gas anchor again and to form, and wherein gas anchor is according to the difference of gas-liquid density, by helical structure gas-liquid is separated, liquid enters oil well pump and is extracted into ground, and gas enters the oil jacket annular space, discharges then outside the well; And gas prevention pump is by opening the effect discharge opeing of closing by force by force, even contain the ordinary production that a spot of gas also can not influence pump in the liquid, solved the problem that pump efficiency that high gas-oil ratio (HGOR) brings reduces thus.
Yet the problem that single tubing string still can't solve effective control production fluid temperature is produced in above-mentioned fireflood.In fireflood is produced, down-hole fluid is the highest to surpass 700 ℃, minimumly be lower than the crude oil inflection temperature (inflection temperature refers under certain temperature condition, the viscosity of viscous crude obviously reduces, suitable with common thin oil viscosity), during too high when downhole temperature, as to surpass tubing string resistance to extreme temperature, significantly reduced in the tubing string life-span, even damage rupture occur and cause pipe fitting to be scrapped; When temperature was too low, the viscous crude in the pit shaft was difficult to flow, for the lifting operation brings sizable difficulty, so too high or too low for temperaturely all can influence normally carrying out of production.
It is the problem that solves the monitoring downhole temperature that the operating personnel is also arranged at present, flow string is proposed outside the well, be lowered to the thermometric tubing string again thermometric is carried out in the down-hole, also need kill-job to operate to prevent blowout and change tubing string at every turn, operation is loaded down with trivial details, delay man-hour, waste of manpower, the frequent kill job of horizontal production well also can make the well killing fluid of a large amount of low temperature that the stratum is damaged in the manufacturing process of fireflood simultaneously, especially stable propelling of live wire leading edge caused direct influence (the part oil reservoir is entered the low-temperature oxidation district by the high-temperature oxydation district, influence effect of combustion), therefore will directly cause fireflood production to carry out.
In addition, in the existing fireflood oil well, obtaining of downhole temperature is to utilize thermocouple temperature measurement (temperature-measurement principle: thermocouple sense temperature, and temperature signal converted to the thermo-electromotive force signal, convert the temperature of measured medium to by electric meter), field operation is prefabricated in coiled tubing many group thermocouples, is lowered in the monitoring tubing string with coiled tubing handlebar coiled tubing.Be to show that by data collecting system data collecting system is placed on the well site, is convenient to the position of observed and recorded to the collection that records temperature.It is thermocouple thermometer or glass thermometer that the temperature of well head is obtained, and is installed on the well head production procedure pipeline.
Yet existing temperature survey and display system have following defective:
(1) horizontal production well is mainly enrolled the production fluid temperature in well head and shaft bottom, and gas injection well is mainly enrolled tired gas injection rate, gas injection speed.The data acquisition of these two mouthfuls of wells disperses, and needs operating personnel frequently to observe, and only by manually per hour recording once, the data recording complexity, workload is big, labor intensive, and the temperature data of record all disperses, and can't accurately express downhole temperature situation over time;
(2) after obtaining temperature data, do not have feedback element, when operating personnel find that amplitude of variation is very big, can only the people for carrying out temperature actuated (adjust water injection rate, gas injection rate, and/or open electrical heating etc.); If adjust untimely, the high-temperature oxydation burning may appear in the horizontal production well near wellbore zone, the production fluid temperature will promote significantly, might have serious consequences to fireflood, burn out, has channeling, shake out etc. as tubing string, if and gas injection rate does not reach the requirement of oil reservoir high-temperature oxydation burning, the oil reservoir burning will enter the low-temperature oxidation burning.
Summary of the invention
Defective in view of the aforementioned technical background, purpose of the present invention, namely provide a kind of fireflood assisted gravity drainage injection and extraction system based on intelligent temperature control and annotate mining method, by be lowered to flow string, monitoring tubing string and injection string three casing strings at producing well, realize three pipe independently workings, thus monitoring when making the present invention have warm compaction simultaneously, down-hole Oil-gas Separation, multi-functional and the advantage well controlling the production fluid temperature and need not the assurance of kill-job repeatedly fireflood combustion efficiency; Show by the temperature measurement data centralized collection with producing well down-hole and well head, and feedback controling equipment is set, adjust the temperature of fireflood producing well well head and down-hole in real time according to variation of temperature, do not need artificial adjustment, both saved manpower, avoided again because of the untimely serious consequence of bringing to fireflood production of artificial adjustment.
The purpose of the invention described above is to be realized by following technical scheme:
A kind of fireflood assisted gravity drainage injection and extraction system based on intelligent temperature control, in producing well, be provided with injection string, monitoring tubing string and flow string three covers tubing string independent of each other, in gas injection well, be provided with the gas injection tubing string, and the intelligent temperature control device that is used for intelligent control production fluid temperature, wherein:
Injection string comprises instlated tubular, screen casing and the starting taper of order serial connection, the monitoring tubing string comprises monitoring pipe, screen casing and the starting taper of order serial connection, also be provided with a plurality of pressure testers in the described monitoring pipe, flow string comprises hollow stem, gas prevention pump, gas anchor, screen casing and the starting taper of order serial connection;
The gas injection tubing string comprises oil pipe and the packer of order serial connection, and gas injection tubing string end is provided with horn mouth;
The intelligent temperature control device comprises the many groups thermal detector that is arranged in the described monitoring tubing string, and is installed in the temperature probe on the producing well well head production flow line; Be arranged on ground surface end, in order to collecting the data acquisition equipment of down-hole and wellhead temperature, data acquisition equipment connects described many group thermal detectors and temperature probes by many cables; Be used for sending according to the output result of data acquisition equipment the control appliance of adjustment instruction, the input interface of control appliance and data acquisition equipment electrically connect; The temperature control executing agency that the controlled equipment of energy is controlled, be electrically connected at the output interface of control appliance, described temperature control executing agency comprises the injection pipeline that is communicated in described injection string, the gas injection pipeline that is communicated in gas injection tubing string in the described gas injection well and the one at least that stretches into the electric heater unit three of described flow string.
Aforesaid injection and extraction system, described injection and extraction system has straight well section and net horizontal section downwards along the producing well well head, and wherein, described injection string and monitoring tubing string are lowered into net horizontal section, and described flow string only is lowered into the straight well section.
Aforesaid injection and extraction system, the monitoring pipe of described monitoring tubing string are integral joint tubing, and described pressure tester and described thermal detector are distributed in straight well section and the net horizontal section of monitoring tubing string.
Aforesaid injection and extraction system, described control appliance have three output interfaces, and described temperature control executing agency comprises injects pipeline, gas injection pipeline and electric heater unit, and this three is corresponding one by one with above-mentioned three output interfaces.
Aforesaid injection and extraction system be equipped with the electromagnetic valve for the control flow on described injection pipeline and the gas injection pipeline, and each electromagnetic valve is electrically connected at the output interface of described control appliance respectively.
Aforesaid injection and extraction system, described electric heater unit are provided with the electrical heating switch that controlled by described control appliance, and the electrical heating switch is electrically connected at the output interface of described control appliance.
Aforesaid injection and extraction system, described data acquisition equipment are data collecting card.
Aforesaid injection and extraction system, described control appliance are programmable logic controller or single-chip microcomputer.
Aforesaid injection and extraction system, described pressure tester are capillary tube, and described thermal detector is thermocouple.
Aforesaid injection and extraction system, the vertical distance of the described producing well horizontal segment of the bottom hole spacing of described gas injection well end and horizontal range are all between 5-10m.
The present invention also provides a kind of notes mining method of fireflood assisted gravity drainage, uses aforesaid fireflood assisted gravity drainage injection and extraction system, and this method comprises:
Warm-up phase: inject steam simultaneously along producing well injection string and gas injection well gas injection tubing string, simultaneously, discharge the production fluid on preheating stratum along the producing well flow string;
The fireflood stage: continue steam injection along the producing well injection string, gas injection well gas injection tubing string stops steam injection, changes the injection air, gives rise to ground until production fluid.
Aforesaid method, in the described fireflood stage, when the shortage of heat of injecting steam with the lifting production fluid during to ground, the auxiliary lifting of electric heater unit of opening flow string.
Aforesaid method comprises also that after production fluid gives rise to ground fireflood takes effect the stage, takes effect the stage in fireflood:
When horizontal production well shaft bottom production fluid temperature surpasses 300 ℃, and horizontal production well well head production fluid temperature lowers the temperature to underground water-injection along the producing well injection string, and sets waterflood injection rate according to the production fluid amount when being higher than the crude oil inflection temperature, reduces the gas injection well gas injection rate simultaneously;
When horizontal production well shaft bottom production fluid temperature above 300 ℃, and when horizontal production well well head production fluid temperature is lower than the crude oil inflection temperature, lower the temperature to underground water-injection along the producing well injection string, and set waterflood injection rate according to the production fluid amount, open electric heater unit simultaneously, and reduce the gas injection well gas injection rate;
The production fluid temperature is lower than 200 ℃ when the horizontal production well shaft bottom, and horizontal production well well head production fluid temperature heats up along the producing well injection string to the down-hole steam injection when being lower than the crude oil inflection temperature, and sets steam injection speed according to the production fluid amount, improves the gas injection well gas injection rate simultaneously.Aforesaid method takes effect the stage in described fireflood, and the gas anchor of flow string is promoted to the straight well section so that the gas-liquid separation of down-hole.
By above technical scheme, the invention has the advantages that:
1. injection string of the present invention is used for steam injection preheating stratum, the fireflood initial stage accompanies hot lifting (because the fireflood initial stage leaks into the lower or low-temperature oxidation of crude oil temperature in shaft bottom, cause viscosity of crude to become big, injection string of the present invention can inject steam reduces the production fluid viscosity that leaks into the shaft bottom, be easy to give rise to ground), fireflood takes effect, and (the draining section meets or exceeds the tiptoe place of horizontal production well in phase water filling cooling, this moment, the produced fluid temperature was higher, be up to 700 ℃, surpass 350 ℃ of the resistance to extreme temperatures of net horizontal section flow string, injection string of the present invention can inject cold water it is lowered the temperature); Temperature and pressure changed at the bottom of the monitoring tubing string was used for real-time monitor well, helped to adjust manufacturing parameter; Flow string satisfies the production requirement in fireflood whole production stage, and realizes the function of down-hole Oil-gas Separation.By above three casing strings, make the present invention under the prerequisite that need not to change repeatedly tubing string and kill-job repeatedly, monitoring when having warm compaction simultaneously, down-hole Oil-gas Separation, well control multi-functional and the advantage of production fluid temperature and assurance fireflood combustion efficiency.
2. the fireflood assisted gravity drainage production phase comprises warm-up phase, fireflood initial stage, the fireflood stage three phases that takes effect, need inject high-quality steam preheating stratum in the phase I horizontal production well, need the auxiliary lifting of steam injection companion heat in second stage, need the water filling cooling at three phases; And the instlated tubular of injection string of the present invention can satisfy the requirement that high mass dryness fraction is annotated vapour, can reach the effect that reduces heat waste in the hot stage of auxiliary companion.Therefore, be to reduce the operation number of times, injection string is selected instlated tubular for use, need not to change different instlated tubulars at the three phases of fireflood, reduces in the fireflood manufacturing process the frequent kill-job of horizontal production well thus to the stable influence that advances of live wire leading edge.
3. because in the whole process that fireflood is produced, the gas-oil ratio scope is bigger, and for the mid-deep strata heavy crude reservoir, gaslift can not meet the demands, and the bottom of flow string of the present invention is provided with gas anchor, make liquids and gases obtain separating by the gravity effect.
4. the present invention is provided with gas prevention pump on gas anchor top, and gas prevention pump is opened travelling valve by mechanical type, can prevent gas lock, reduces gas to the influence of pump efficiency, reaches the purpose of efficient lifting; And the double action by gas prevention pump and gas anchor realizes the down-hole Oil-gas Separation can reducing surface gathering and transferring pipeline and oil gas separation equipment, reduces cost of investment, improves the fireflood economic benefit, also can reduce to burn tail gas to the influence of pump efficiency.
5. intelligent temperature control device of the present invention is by obtaining producing well well head and liquid generated underground temperature information in real time, and temperature information carried out collection analysis, again by injecting pipeline, gas injection pipeline and electric heater unit carry out moderately and at the right moment temperature actuated feedback to producing well well head and downhole temperature, shaft bottom production fluid temperature is between 200～300 ℃, well head production fluid temperature is between the crude oil inflection temperature to 150 ℃, be that well head and liquid generated underground temperature all remain in controlled range and the safe range, this device is applied to produce, whole temperature data acquisition, computing, feedback procedure need not artificial the adjustment and gets involved, for full-automation is implemented, both saved manpower, avoided again because of the untimely industry temperature control that causes of artificial adjustment, thereby a series of production problems that cause, as: reduce the damage of tubing string, reduce the has channeling in the manufacturing process, reduce the surface construction cost, promote the even propelling of live wire, improve oil displacement efficiency and the economic benefit of fireflood assisted gravity drainage.
Description of drawings
Fig. 1 is the schematic diagram that the present invention is based on the fireflood assisted gravity drainage injection and extraction system of intelligent temperature control.
The specific embodiment
For making goal of the invention of the present invention, technological means and technique effect have more complete and clearly disclosing, below be elaborated, and see also accompanying drawing and parts label.
As shown in Figure 1, a kind of fireflood assisted gravity drainage injection and extraction system based on intelligent temperature control, in producing well 400, be provided with injection string 100, monitoring tubing string 200 and flow string 300 3 covers tubing string independent of each other, in gas injection well 900, be provided with the gas injection tubing string, and the intelligent temperature control device that is used for intelligent control production fluid temperature, wherein:
The gas injection tubing string comprises oil pipe 21 and the packer 14 of order serial connection, and gas injection tubing string end is provided with horn mouth 15;
The intelligent temperature control device comprises the many groups thermal detector 11 that is arranged in the described monitoring tubing string 200, and is installed in the temperature probe 23 on the producing well 400 well head production flow lines; Be arranged on ground surface end, the data acquisition equipment 17 in order to collect down-hole and wellhead temperature, data acquisition equipment 17 connects described many group thermal detectors 11 and temperature probe 23 by many cables; Be used for sending according to the output result of data acquisition equipment 17 control appliance 19 of adjustment instruction, the input interface of control appliance 19 and data acquisition equipment 17 electrically connect; The temperature control executing agency that the controlled equipment 19 of energy is controlled, be electrically connected at the output interface of control appliance 19, described temperature control executing agency comprises the injection pipeline 91 that is communicated in described injection string 100, the gas injection pipeline 92 that is communicated in gas injection tubing strings 21 in the described gas injection well 900 and the one at least that stretches into electric heater unit 41 threes of described flow string 300.
Preferably, described injection and extraction system has straight well section a and net horizontal section b downwards along producing well 400 well heads, and wherein, described injection string 100 and monitoring tubing string 200 are lowered into net horizontal section b, and described flow string 300 only is lowered into straight well section a.
Preferably, the monitoring pipe 2 of described monitoring tubing string 200 is integral joint tubing, and described pressure tester 9 and described thermal detector 11 are distributed in straight well section a and the net horizontal section b of monitoring tubing string 200.
Preferably, described control appliance 19 has three output interfaces, and described temperature control executing agency comprises injects pipeline 91, gas injection pipeline 92 and electric heater unit 41, and this three is corresponding one by one with above-mentioned three output interfaces.
Preferably, be equipped with the electromagnetic valve 16,20 for the control flow on described injection pipeline 91 and the gas injection pipeline 92, and each electromagnetic valve 16,20 is electrically connected at the output interface of described control appliance 19 respectively.
Preferably, described electric heater unit 41 is provided with the electrical heating switch 18 that controlled by described control appliance 19, and electrical heating switch 18 is electrically connected at the output interface of described control appliance 19.
Preferably, described data acquisition equipment 17 is data collecting card, and its model is: Siemens S7-EM235.
Preferably, described control appliance 19 is programmable logic controller or single-chip microcomputer.Certainly, also can be to have programmable chip arbitrarily, and can be in order to the terminal of control hardware, for example computer.
Preferably, described pressure tester 9 is capillary tube, and described thermal detector 11 is thermocouple.
Preferably, the vertical distance of the described producing well 400 horizontal segment b ends of the bottom hole spacing of described gas injection well 900 and horizontal range are all between 5-10m.
According to the present invention that technique scheme constitutes, its operating principle and method of operating are as follows:
Producing well tubing string construction and installation order: be lowered to injection string (instlated tubular) earlier and (reserve the safety operation distance) to artificial bottom of a well tiptoe place, connect 3～6m screen casing; Be lowered to the monitoring tubing string again, (reserve the safety operation distance) to artificial bottom of a well tiptoe place, connect the 2m screen casing; Be lowered to flow string at last, under warm-up phase is dark as far as possible (the following pump degree of depth is located less than 55 ° in hole deviation), fireflood takes effect the phase, and the following pump degree of depth is adjusted to the straight well section.Well head connects three pipe well mouths, the enough three pipe independently workings in the arrange space of three endowels in pit shaft.
The fireflood Preliminary division is three phases.First stage is the fireflood preproduction phase, and this stage mainly is to inject steam by injection string and gas injection tubing string, and the preheating oil reservoir is set up notes, adopted the thermal communication between the well, for after-ignition and production are prepared; Second stage is the fireflood initial stage, this stage live wire leading edge is no show artificial bottom of a well tiptoe also, dredge oil amount is less, production fluid temperature lower (minimum be lower than original inflection temperature, inflection temperature namely instigates the viscosity of viscous crude obviously to reduce and the temperature condition suitable with common thin oil viscosity); Three phases is that fireflood takes effect the phase, and oneself arrives horizontal well tiptoe place this stage live wire leading edge, and dredge oil amount increases greatly, production fluid temperature higher (the highest may above 700 ℃).Below introduce method of operating of the present invention stage by stage:
First stage: injection string and gas injection tubing string inject steam, when injecting steam, flow string is in time discharged the production fluid on preheating stratum, thereby improves the stratum pre-heat effect, temperature, pressure at the bottom of the real-time monitor well of monitoring tubing string is for judging whether that reaching pre-heat effect provides foundation.
Second stage: because the production fluid temperature is lower, injection string still injects steam (injection rate is littler than warm-up phase), and the gas injection tubing string changes air injection, by the auxiliary fireflood burning of air, improves the production fluid temperature by steam, namely accompanies hot lifting; The monitoring tubing string is monitored the production fluid temperature in real time, guarantees that the injection rate of steam enough makes production fluid efficiently give rise to ground; Flow string is in time discharged production fluid, does not influence the effect of fireflood displacement; If inject the shortage of heat of steam so that production fluid is given rise to ground, namely crude oil temperature drops to below the inflection temperature in the lifting process, then needs to be lowered to cable in the hollow stem of flow string.
Three phases: because production fluid temperature higher (the highest may above 700 ℃), may surpass the resistance to extreme temperature of tubing string, at this moment, injection string injects cold water, and to reduce the temperature of production fluid, i.e. water mixing is lowered the temperature; The monitoring tubing string is monitored the production fluid temperature in real time, guarantees that the injection rate of cold water enough makes the production fluid temperature drop in the safe range; This moment, the production fluid amount raise, and gas production also raises, and needed the pump of flow string is promoted to straight well section (because gas anchor is to make liquids and gases obtain separating by the gravity effect), made the better effects if of gas-liquid separation.
For common horizontal well completion well depth structure, casing inner diameter Φ 224mm, horizontal segment screen casing internal diameter Φ 159mm.So each tubing string of the present invention can be by following external diameter value design, injection string maximum outside diameter Φ 88.9mm, flow string maximum outside diameter Φ 88.9mm, monitoring tubing string maximum outside diameter Φ 53mm.
The operating principle of intelligent temperature control device:
Temperature under horizontal well shaft bottom and the pump is transferred in the data acquisition equipment by thermocouple, and the temperature of well head is measured by temperature probe, arrives data acquisition equipment by cable transmission; The temperature of gathering by cable transmission in control appliance, in control appliance, preset a sleeving temperature threshold value according to Field Production Data, whether the temperature that programmed decision is measured exceeds threshold range, then control appliance need to determine whether water filling cooling, steam injection companion heat, adjusts gas injection rate by result of determination, and the setting injection rate, and determine whether to need to open electrical heating; Control result by control appliance output gives each temperature control executing agency by cable transmission, adjusts waterflood injection rate by electromagnetic valve intelligence, and intelligence is adjusted gas injection rate, and to open electric heater unit by the control of electrical heating switch be the flow string heating.Whole temperature data acquisition, computing, feedback procedure need not artificially to adjust to get involved, and are that full-automation is implemented, so both saved manpower, have avoided again having serious consequences to production because artificial adjustment is untimely.
The invention provides a kind of notes mining method of fireflood assisted gravity drainage, use aforesaid fireflood assisted gravity drainage injection and extraction system, this method comprises:
Warm-up phase: inject steam simultaneously along producing well injection string and gas injection well gas injection tubing string, simultaneously, discharge the production fluid on preheating stratum along the producing well flow string;
The fireflood stage: continue steam injection along the producing well injection string, gas injection well gas injection tubing string stops steam injection, changes the injection air, gives rise to ground until production fluid.
Aforesaid method, in the described fireflood stage, when the shortage of heat of injecting steam with the lifting production fluid during to ground, the auxiliary lifting of electric heater unit of opening flow string.
Aforesaid method comprises also that after production fluid gives rise to ground fireflood takes effect the stage, takes effect the stage in fireflood:
When horizontal production well shaft bottom production fluid temperature surpasses 300 ℃, and horizontal production well well head production fluid temperature lowers the temperature to underground water-injection along the producing well injection string, and sets waterflood injection rate according to the production fluid amount when being higher than the crude oil inflection temperature, reduces the gas injection well gas injection rate simultaneously;
When horizontal production well shaft bottom production fluid temperature above 300 ℃, and when horizontal production well well head production fluid temperature is lower than the crude oil inflection temperature, lower the temperature to underground water-injection along the producing well injection string, and set waterflood injection rate according to the production fluid amount, open electric heater unit simultaneously, and reduce the gas injection well gas injection rate;
The production fluid temperature is lower than 200 ℃ when the horizontal production well shaft bottom, and horizontal production well well head production fluid temperature heats up along the producing well injection string to the down-hole steam injection when being lower than the crude oil inflection temperature, and sets steam injection speed according to the production fluid amount, improves the gas injection well gas injection rate simultaneously.
Aforesaid method takes effect the stage in described fireflood, and the gas anchor of flow string is promoted to the straight well section so that the gas-liquid separation of down-hole.
Above for only being the schematic part embodiment of the present invention; be not in order to limit the scope of the invention; any those skilled in the art, the equivalent variations of having done under the prerequisite that does not break away from design of the present invention and principle and modification all should be included within this patent protection domain.
Claims (14)
1. fireflood assisted gravity drainage injection and extraction system based on intelligent temperature control, it is characterized in that, in producing well, be provided with injection string, monitoring tubing string and flow string three covers tubing string independent of each other, in gas injection well, be provided with the gas injection tubing string, and the intelligent temperature control device that is used for intelligent control production fluid temperature, wherein:
Injection string comprises instlated tubular, screen casing and the starting taper of order serial connection, the monitoring tubing string comprises monitoring pipe, screen casing and the starting taper of order serial connection, also be provided with a plurality of pressure testers in the described monitoring pipe, flow string comprises hollow stem, gas prevention pump, gas anchor, screen casing and the starting taper of order serial connection;
The gas injection tubing string comprises oil pipe and the packer of order serial connection, and gas injection tubing string end is provided with horn mouth;
The intelligent temperature control device comprises the many groups thermal detector that is arranged in the described monitoring tubing string, and is installed in the temperature probe on the producing well well head production flow line; Be arranged on ground surface end, in order to collecting the data acquisition equipment of down-hole and wellhead temperature, data acquisition equipment connects described many group thermal detectors and temperature probes by many cables; Be used for sending according to the output result of data acquisition equipment the control appliance of adjustment instruction, the input interface of control appliance and data acquisition equipment electrically connect; The temperature control executing agency that the controlled equipment of energy is controlled, be electrically connected at the output interface of control appliance, described temperature control executing agency comprises the injection pipeline that is communicated in described injection string, the gas injection pipeline that is communicated in gas injection tubing string in the described gas injection well and the one at least that stretches into the electric heater unit three of described flow string.
2. injection and extraction system according to claim 1, it is characterized in that described injection and extraction system has straight well section and net horizontal section downwards along the producing well well head, wherein, described injection string and monitoring tubing string are lowered into net horizontal section, and described flow string only is lowered into the straight well section.
3. injection and extraction system according to claim 2 is characterized in that, the monitoring pipe of described monitoring tubing string is integral joint tubing, and described pressure tester and described thermal detector are distributed in straight well section and the net horizontal section of monitoring tubing string.
4. injection and extraction system according to claim 1 is characterized in that, described control appliance has three output interfaces, and described temperature control executing agency comprises injects pipeline, gas injection pipeline and electric heater unit, and this three is corresponding one by one with above-mentioned three output interfaces.
5. injection and extraction system according to claim 4 is characterized in that, be equipped with the electromagnetic valve for the control flow on described injection pipeline and the gas injection pipeline, and each electromagnetic valve is electrically connected at the output interface of described control appliance respectively.
6. injection and extraction system according to claim 4 is characterized in that, described electric heater unit is provided with the electrical heating switch that controlled by described control appliance, and the electrical heating switch is electrically connected at the output interface of described control appliance.
7. according to each described injection and extraction system of claim 1-6, it is characterized in that described data acquisition equipment is data collecting card.
8. according to each described injection and extraction system of claim 1-6, it is characterized in that described control appliance is programmable logic controller or single-chip microcomputer.
9. according to each described injection and extraction system of claim 1-6, it is characterized in that described pressure tester is capillary tube, described thermal detector is thermocouple.
10. according to each described injection and extraction system of claim 1-6, it is characterized in that the vertical distance of the described producing well horizontal segment of the bottom hole spacing of described gas injection well end and horizontal range are all between 5-10m.
11. the notes mining method of a fireflood assisted gravity drainage is used fireflood assisted gravity drainage injection and extraction system as claimed in claim 1, this method comprises:
Warm-up phase: inject steam simultaneously along producing well injection string and gas injection well gas injection tubing string, simultaneously, discharge the production fluid on preheating stratum along the producing well flow string;
The fireflood stage: continue steam injection along the producing well injection string, gas injection well gas injection tubing string stops steam injection, changes the injection air, gives rise to ground until production fluid.
12. method according to claim 11 is characterized in that:
In the described fireflood stage, when the shortage of heat of injecting steam with the lifting production fluid during to ground, the auxiliary lifting of electric heater unit of opening flow string.
13. according to claim 11 or 12 described methods, it is characterized in that, after giving rise to ground, production fluid comprises also that fireflood takes effect the stage, take effect the stage in fireflood:
When horizontal production well shaft bottom production fluid temperature surpasses 300 ℃, and horizontal production well well head production fluid temperature lowers the temperature to underground water-injection along the producing well injection string, and sets waterflood injection rate according to the production fluid amount when being higher than the crude oil inflection temperature, reduces the gas injection well gas injection rate simultaneously;
When horizontal production well shaft bottom production fluid temperature above 300 ℃, and when horizontal production well well head production fluid temperature is lower than the crude oil inflection temperature, lower the temperature to underground water-injection along the producing well injection string, and set waterflood injection rate according to the production fluid amount, open electric heater unit simultaneously, and reduce the gas injection well gas injection rate;
The production fluid temperature is lower than 200 ℃ when the horizontal production well shaft bottom, and horizontal production well well head production fluid temperature heats up along the producing well injection string to the down-hole steam injection when being lower than the crude oil inflection temperature, and sets steam injection speed according to the production fluid amount, improves the gas injection well gas injection rate simultaneously.
14. method according to claim 13 is characterized in that:
Take effect the stage in described fireflood, the gas anchor of flow string is promoted to the straight well section so that the gas-liquid separation of down-hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310205549.XA CN103277077B (en) | 2013-05-29 | 2013-05-29 | Based on fireflood assisted gravity drainage injection and extraction system and the note mining method of intelligent temperature control |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310205549.XA CN103277077B (en) | 2013-05-29 | 2013-05-29 | Based on fireflood assisted gravity drainage injection and extraction system and the note mining method of intelligent temperature control |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103277077A true CN103277077A (en) | 2013-09-04 |
| CN103277077B CN103277077B (en) | 2016-01-06 |
Family
ID=49059681
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310205549.XA Active CN103277077B (en) | 2013-05-29 | 2013-05-29 | Based on fireflood assisted gravity drainage injection and extraction system and the note mining method of intelligent temperature control |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103277077B (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104265256A (en) * | 2014-07-31 | 2015-01-07 | 中国石油天然气股份有限公司 | In-situ combustion electric ignition device |
| CN104314532A (en) * | 2014-10-20 | 2015-01-28 | 中国石油天然气股份有限公司 | Mining method for heavy oil reservoir and well network thereof |
| CN105587304A (en) * | 2014-10-23 | 2016-05-18 | 中国石油天然气股份有限公司 | Fireflooding ignition monitoring system |
| CN105672977A (en) * | 2014-11-21 | 2016-06-15 | 中国石油天然气股份有限公司 | Horizontal well system and exploitation method for oil drainage of horizontal well |
| CN106968649A (en) * | 2017-04-27 | 2017-07-21 | 中国石油天然气股份有限公司 | The ignition method and recovery method of channeling oil reservoir |
| CN107795309A (en) * | 2017-11-10 | 2018-03-13 | 中国石油天然气股份有限公司 | Heavy oil flow string and its oil production method |
| CN107869341A (en) * | 2017-11-10 | 2018-04-03 | 中国石油天然气股份有限公司 | A kind of heavy oil oil extraction system and method |
| CN113700462A (en) * | 2020-05-21 | 2021-11-26 | 中国石油天然气股份有限公司 | Fire flooding oil production device and method for thick oil horizontal well |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2008009114A1 (en) * | 2006-07-19 | 2008-01-24 | John Nenniger | Methods and apparatuses for enhanced in situ hydrocarbon production |
| CN102213089A (en) * | 2011-06-02 | 2011-10-12 | 中国石油天然气股份有限公司 | Method and system for extracting oil from shallow heavy oil reservoir |
| CN202531149U (en) * | 2012-02-16 | 2012-11-14 | 中国石油天然气股份有限公司 | Three-pipe thermal recovery well head device shell |
| CN102979493A (en) * | 2012-12-04 | 2013-03-20 | 尤尼斯油气技术（中国）有限公司 | Gas injection system for combustion of oil in-situ under super-critical pressure and gas injection method thereof |
| CN203394488U (en) * | 2013-05-29 | 2014-01-15 | 中国石油天然气股份有限公司 | Fireflood-assisted gravity drainage injection and production system based on intelligent temperature control |
-
2013
- 2013-05-29 CN CN201310205549.XA patent/CN103277077B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2008009114A1 (en) * | 2006-07-19 | 2008-01-24 | John Nenniger | Methods and apparatuses for enhanced in situ hydrocarbon production |
| CN102213089A (en) * | 2011-06-02 | 2011-10-12 | 中国石油天然气股份有限公司 | Method and system for extracting oil from shallow heavy oil reservoir |
| CN202531149U (en) * | 2012-02-16 | 2012-11-14 | 中国石油天然气股份有限公司 | Three-pipe thermal recovery well head device shell |
| CN102979493A (en) * | 2012-12-04 | 2013-03-20 | 尤尼斯油气技术（中国）有限公司 | Gas injection system for combustion of oil in-situ under super-critical pressure and gas injection method thereof |
| CN203394488U (en) * | 2013-05-29 | 2014-01-15 | 中国石油天然气股份有限公司 | Fireflood-assisted gravity drainage injection and production system based on intelligent temperature control |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104265256A (en) * | 2014-07-31 | 2015-01-07 | 中国石油天然气股份有限公司 | In-situ combustion electric ignition device |
| CN104314532A (en) * | 2014-10-20 | 2015-01-28 | 中国石油天然气股份有限公司 | Mining method for heavy oil reservoir and well network thereof |
| CN105587304A (en) * | 2014-10-23 | 2016-05-18 | 中国石油天然气股份有限公司 | Fireflooding ignition monitoring system |
| CN105672977A (en) * | 2014-11-21 | 2016-06-15 | 中国石油天然气股份有限公司 | Horizontal well system and exploitation method for oil drainage of horizontal well |
| CN105672977B (en) * | 2014-11-21 | 2019-06-11 | 中国石油天然气股份有限公司 | A kind of recovery method of horizontal well system and horizontal well draining |
| CN106968649A (en) * | 2017-04-27 | 2017-07-21 | 中国石油天然气股份有限公司 | The ignition method and recovery method of channeling oil reservoir |
| CN107795309A (en) * | 2017-11-10 | 2018-03-13 | 中国石油天然气股份有限公司 | Heavy oil flow string and its oil production method |
| CN107869341A (en) * | 2017-11-10 | 2018-04-03 | 中国石油天然气股份有限公司 | A kind of heavy oil oil extraction system and method |
| CN113700462A (en) * | 2020-05-21 | 2021-11-26 | 中国石油天然气股份有限公司 | Fire flooding oil production device and method for thick oil horizontal well |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103277077B (en) | 2016-01-06 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103277077B (en) | Based on fireflood assisted gravity drainage injection and extraction system and the note mining method of intelligent temperature control | |
| US7747388B2 (en) | Systems and methods for acquiring data in thermal recovery oil wells | |
| US3954140A (en) | Recovery of hydrocarbons by in situ thermal extraction | |
| CN104011327B (en) | Utilize the dielectric properties of the insulated conductor in subsurface formations to determine the performance of insulated conductor | |
| CN102900415B (en) | Method for mining deep and ultra-deep thick oil pools by using double horizontal well fire flooding drainage | |
| CN102678096B (en) | Hot water assisted gravity drainage method for mining high pour-point oil deposit | |
| US3542131A (en) | Method of recovering hydrocarbons from oil shale | |
| CN103291244A (en) | Method for compensating thermal energy of horizontal well mining heavy oil reservoirs in large power and subsection mode in pit | |
| CN112730503B (en) | Operation method of simulation device for exploiting oil shale by high-temperature fluid | |
| RU2610459C2 (en) | One-piece joint for insulated conductors | |
| RU2436943C1 (en) | Procedure for extraction of high viscous oil from deviating hole by method of steam cyclic pumping into reservoir | |
| US20150354330A1 (en) | In situ hydrocarbon recovery using distributed flow control devices for enhancing temperature conformance | |
| CN102906369A (en) | System for providing uniform heating to subterranean formation for recovery of mineral deposits | |
| CN103867172B (en) | Injection-production system and injection-production method | |
| CN102979493B (en) | Gas injection system for combustion of oil in-situ under super-critical pressure and gas injection method thereof | |
| CN103615225A (en) | Mid-depth layer oil reservoir double-horizontal-well equal-temperature-difference forced steam circulation preheating method | |
| CN203394444U (en) | Fireflood-assisted gravity drainage injection and production technology system | |
| CN108487888A (en) | For improving oil shale in-situ exploitation rate of oil and gas recovery assisted heating device and method | |
| CN203394488U (en) | Fireflood-assisted gravity drainage injection and production system based on intelligent temperature control | |
| CN203515532U (en) | Downhole electric heating device of continuous tube type horizontal well | |
| CN105745396A (en) | Steam-injecting mineral insulated heater design | |
| RU2334867C1 (en) | Method of simultaneous-separate operation of several payout beds and installation of well for implementation of this method | |
| CN105781490A (en) | Microwave well flushing device for production well and well flushing method of microwave well flushing device | |
| CN204371284U (en) | Exhaust shaft is utilized to adjust the well pattern structure of fireflood assisted gravity drainage live wire form | |
| CN106014379A (en) | Layered simultaneous production testing string |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |