CN103277077B - Fireflooding assisted gravity drainage injection and production system and injection and production method based on intelligent temperature control - Google Patents
Fireflooding assisted gravity drainage injection and production system and injection and production method based on intelligent temperature control Download PDFInfo
- Publication number
- CN103277077B CN103277077B CN201310205549.XA CN201310205549A CN103277077B CN 103277077 B CN103277077 B CN 103277077B CN 201310205549 A CN201310205549 A CN 201310205549A CN 103277077 B CN103277077 B CN 103277077B
- 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.)
- Active
Links
- 238000002347 injection Methods 0.000 title claims abstract description 182
- 239000007924 injection Substances 0.000 title claims abstract description 182
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 114
- 230000005484 gravity Effects 0.000 title claims abstract description 21
- 238000012544 monitoring process Methods 0.000 claims abstract description 45
- 238000000034 method Methods 0.000 claims abstract description 30
- 239000007788 liquid Substances 0.000 claims abstract description 23
- 230000002265 prevention Effects 0.000 claims abstract description 8
- 239000000523 sample Substances 0.000 claims abstract description 8
- 239000012530 fluid Substances 0.000 claims description 60
- 238000000605 extraction Methods 0.000 claims description 31
- 239000003921 oil Substances 0.000 claims description 26
- 230000000694 effects Effects 0.000 claims description 22
- 238000010793 Steam injection (oil industry) Methods 0.000 claims description 16
- 239000010779 crude oil Substances 0.000 claims description 16
- 238000010438 heat treatment Methods 0.000 claims description 10
- 238000000926 separation method Methods 0.000 claims description 9
- 230000015572 biosynthetic process Effects 0.000 claims description 7
- 238000005065 mining Methods 0.000 claims description 6
- 244000273618 Sphenoclea zeylanica Species 0.000 claims description 4
- 238000005485 electric heating Methods 0.000 abstract 1
- 238000009413 insulation Methods 0.000 abstract 1
- 239000007789 gas Substances 0.000 description 82
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 8
- 230000008901 benefit Effects 0.000 description 6
- 238000007254 oxidation reaction Methods 0.000 description 6
- 238000002485 combustion reaction Methods 0.000 description 5
- 230000009471 action Effects 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 3
- 238000009529 body temperature measurement Methods 0.000 description 3
- 230000008859 change Effects 0.000 description 3
- 238000001816 cooling Methods 0.000 description 3
- 238000006073 displacement reaction Methods 0.000 description 3
- 238000011065 in-situ storage Methods 0.000 description 3
- 230000003647 oxidation Effects 0.000 description 3
- 230000005465 channeling Effects 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000013507 mapping Methods 0.000 description 2
- 239000003129 oil well Substances 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 230000003245 working effect Effects 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 229930195733 hydrocarbon Natural products 0.000 description 1
- 150000002430 hydrocarbons Chemical class 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
Landscapes
- Engine Equipment That Uses Special Cycles (AREA)
- Road Paving Structures (AREA)
Abstract
The invention relates to a fireflooding assisted gravity drainage injection and production system and method based on intelligent temperature control, wherein the injection and production system is provided with an injection pipe column, a monitoring pipe column and a production pipe column which are independent from each other in a production well, the gas injection well is provided with a gas injection pipe column and an intelligent temperature control device for intelligently controlling the temperature of produced liquid, wherein: the injection pipe column is connected with the heat insulation pipe, the sieve pipe and the guide cone in series, the monitoring pipe column is connected with the monitoring pipe, the sieve pipe and the guide cone in series, a pressure measuring device is arranged in the monitoring pipe, and the production pipe column is connected with the hollow rod, the gas prevention pump, the gas anchor, the sieve pipe and the guide cone in series; the intelligent temperature control device comprises a plurality of groups of thermometers arranged in a monitoring pipe column, a temperature measuring probe arranged on a production pipeline at a wellhead, data acquisition equipment arranged at the ground end, control equipment connected with the data acquisition equipment, and a temperature control actuating mechanism connected with the control equipment, wherein the temperature control actuating mechanism comprises one of an injection pipeline communicated with an injection pipe column, an injection pipe line communicated with an injection 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, espespecially a kind of fireflood assisted gravity drainage injection and extraction system based on intelligent temperature control and note mining method.
Background technology
Combustion in situ production technique utilizes a part of heavy ingredient of crude oil in oil reservoir to make fuel, continuous burning heat-dissipating, crude oil in oil reservoir is displaced, compared with other oil production methods, there is the many advantages such as applied widely, oil displacement efficiency is high, cost is low, effective substituted technique of thickened oil recovery can be become.Baked wheaten cake technology is applied to horizontal well, the effect of fireflood assisted gravity drainage can be reached.The stable propelling that in fireflood assisted gravity drainage manufacturing process, typical feature is exactly high temperature (the highest more than 700 DEG C), tubing string operations number directly affects live wire leading edge in large, the manufacturing process of high gas-oil ratio (HGOR), production fluid range of temperature, for mid-deep strata heavy crude reservoir, these features are especially large for the normal Influence of production of horizontal production well.Wherein high gas-oil ratio (HGOR) refers to that the ratio regular meeting of lighter hydrocarbons in crude oil, steam and fluid is significantly risen because of combustion in situ, after a large amount of gas enters pump, due to the compressibility of gas, pump efficiency is reduced, when large-minded to a certain extent time, pump can be caused to extract fluid out.
Conventional fireflood flow string structure is single, and mainly take over control air pump by oil pipe string and be connected in series gas anchor again and formed, 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 oil jacket annular space, then discharges outside well; And gas prevention pump is by opening by force the effect discharge opeing of closing by force, even if also can not affect the normal production of pump in liquid containing a small amount of gas, solve the problem of the pump efficiency reduction that high gas-oil ratio (HGOR) is brought thus.
But single tubing string is produced in above-mentioned fireflood still cannot solve the problem effectively controlling production fluid temperature.In fireflood is produced, down-hole fluid is the highest more than 700 DEG C, minimum can (inflection temperature refers under certain temperature condition lower than crude oil inflection temperature, thick oil viscosity obviously reduces, suitable with common thin oil viscosity), during too high when downhole temperature, to exceed tubing string resistance to extreme temperature, the tubing string life-span will be made significantly to reduce, even occur that damage rupture causes pipe fitting to be scrapped; When temperature is too low, the viscous crude in pit shaft is difficult to flowing, for lifting operation brings sizable difficulty, all can affect normally carrying out of production so too high or too low for temperature.
Also operating personnel is had to be the problem solving monitoring downhole temperature at present, flow string is proposed outside well, enter down thermometric tubing string again and thermometric is carried out to down-hole, and change at every turn tubing string also need kill-job operate to prevent blowout, operation is loaded down with trivial details, delay man-hour, waste of manpower, in the manufacturing process of fireflood simultaneously, the frequent kill job of horizontal production well also can make the well killing fluid formation of a large amount of low temperature damage, especially stablize propelling to live wire leading edge to cause direct impact (part oil reservoir enters low-temperature oxidation district by high-temperature oxydation district, the effect of impact burning), therefore cannot carry out directly causing fireflood to be produced.
In addition, in existing fireflood oil well, the acquisition of downhole temperature utilizes thermocouple temperature measurement (temperature-measurement principle: thermocouple sense temperature, and temperature signal is converted to thermo-electromotive force signal, converted to the temperature of measured medium) by electric meter, field operation is prefabricated in coiled tubing for many group thermocouples, enters to monitor in tubing string with under coiled tubing handlebar coiled tubing.To the collection recording temperature be by data collecting system display, data collecting system is placed on well site, is convenient to the position of observed and recorded.It is thermocouple thermometer or glass thermometer that the temperature of well head obtains, and is arranged on well head production procedure pipeline.
But existing temperature survey and display system have following defect:
(1) horizontal production well mainly enrolls the production fluid temperature in well head and shaft bottom, and gas injection well mainly enrolls tired gas injection rate, gas injection speed.The data acquisition dispersion of these two mouthfuls of wells, and need operating personnel frequently to observe, and only by artificial record per hour once, data recording is complicated, and workload is large, labor intensive, and the temperature data of record is all discrete, cannot accurate expression downhole temperature situation over time;
(2) after acquisition temperature data, there is no feedback element, when operating personnel find that amplitude of variation is very large, can only people for carrying out temperature actuated (adjustment water injection rate, gas injection rate, and/or open electrical heating etc.); If adjustment not in time, horizontal production well near wellbore zone may occur that high-temperature oxydation burns, production fluid temperature will significantly promote, likely have serious consequences to fireflood, as tubing string burns out, has channeling, to shake out, if and gas injection rate does not reach the requirement of oil reservoir high-temperature oxydation burning, oil reservoir burning will enter low-temperature oxidation burning.
Summary of the invention
Defect in view of the aforementioned technical background, object of the present invention, namely a kind of fireflood assisted gravity drainage injection and extraction system based on intelligent temperature control and note mining method is to provide, by entering flow string, monitoring tubing string and injection string three casing string under producing well, realize three pipe independently workings, thus make the present invention have temperature and pressure Real-Time Monitoring, downhole oil-gas separation simultaneously, good control production fluid temperature and ensure multi-functional and the advantage of fireflood combustion efficiency without the need to kill-job repeatedly; By the temperature measurement data centralized collection of producing well down-hole and well head is shown, and feedback controling equipment is set, the temperature of fireflood producing well well head and down-hole is adjusted in real time according to the change of temperature, do not need artificial adjustment, both saved manpower, turn avoid because artificial adjustment produces the serious consequence brought to fireflood not in time.
The object of the invention described above is 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 overlap tubing string independent of each other, gas injection tube column is provided with in gas injection well, and for the intelligent temperature control device of intelligent control production fluid temperature, wherein:
Injection string comprises the instlated tubular of sequential concatenation, screen casing and starting taper, monitoring tubing string comprises the monitoring pipe of sequential concatenation, screen casing and starting taper, also be provided with multiple pressure tester in described monitoring pipe, flow string comprises the hollow stem of sequential concatenation, gas prevention pump, gas anchor, screen casing and starting taper;
Gas injection tube column comprises oil pipe and the packer of sequential concatenation, and gas injection tube column end is provided with horn mouth;
Intelligent temperature control device comprises the many groups thermal detector be arranged in described monitoring tubing string, and is arranged on the temperature probe on producing well well head production flow line; Be arranged on ground surface end, in order to collect the data acquisition equipment of down-hole and wellhead temperature, data acquisition equipment connects described many group thermal detectors and temperature probe by multi-cable; For sending the control appliance of temperature adjustment instructions according to the Output rusults of data acquisition equipment, the input interface of control appliance and data acquisition equipment are electrically connected; 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 being communicated in described injection string, the gas injection pipeline being communicated in gas injection tube column in described gas injection well and stretches at least one of electric heater unit three of described flow string.
Injection and extraction system as above, described injection and extraction system has straight well section and net horizontal section downwards along producing well well head, and wherein, described injection string and monitoring tubing string are lowered into net horizontal section, and described flow string is only lowered into straight well section.
Injection and extraction system as above, 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.
Injection and extraction system as above, 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 and above-mentioned three output interface one_to_one corresponding.
Injection and extraction system as above, described injection pipeline and gas injection pipeline are equipped with the electromagnetic valve for controlling flow, and each electromagnetic valve is electrically connected at the output interface of described control appliance respectively.
Injection and extraction system as above, described electric heater unit is provided with the electrical heating switch controlled by described control appliance, and electrical heating switch is electrically connected at the output interface of described control appliance.
Injection and extraction system as above, described data acquisition equipment is data collecting card.
Injection and extraction system as above, described control appliance is programmable logic controller or single-chip microcomputer.
Injection and extraction system as above, described pressure tester is capillary tube, and described thermal detector is thermocouple.
Injection and extraction system as above, the vertical distance of producing well horizontal segment end described in the bottom hole spacing of described gas injection well and horizontal range are all between 5-10m.
The present invention also provides a kind of note mining method of fireflood assisted gravity drainage, and apply fireflood assisted gravity drainage injection and extraction system as above, the method comprises:
Warm-up phase: simultaneously inject steam along producing well injection string and gas injection well gas injection tube column, meanwhile, discharges the production fluid of pre-hot formation along producing well flow string;
In the fireflood stage: continue steam injection along producing well injection string, gas injection well gas injection tube column stops steam injection, changes injection air, until production fluid gives rise to ground.
Method as above, in the described fireflood stage, when inject the shortage of heat of steam with lifting production fluid to ground time, open the electric heater unit auxiliary lifting of flow string.
Method as above, also comprises fireflood and takes effect the stage, take effect the stage in fireflood after production fluid gives rise to ground:
When horizontal production well shaft bottom production fluid temperature is more than 300 DEG C, and horizontal production well well head production fluid temperature higher than crude oil inflection temperature time, lower the temperature to underground water-injection along producing well injection string, and according to Liquid output setting waterflood injection rate, reduce gas injection well gas injection rate simultaneously;
When horizontal production well shaft bottom production fluid temperature is more than 300 DEG C, and horizontal production well well head production fluid temperature lower than crude oil inflection temperature time, lower the temperature along producing well injection string to underground water-injection, and according to Liquid output setting waterflood injection rate, open electric heater unit simultaneously, and reduce gas injection well gas injection rate;
When horizontal production well shaft bottom production fluid temperature is lower than 200 DEG C, and horizontal production well well head production fluid temperature lower than crude oil inflection temperature time, heat up along producing well injection string to down-hole steam injection, and according to Liquid output setting steam injection speed, improve gas injection well gas injection rate simultaneously.Method as above, takes effect the stage in described fireflood, the gas anchor of flow string is promoted to straight well section to make 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 the pre-hot formation of steam injection, the fireflood initial stage accompanies hot lifting (because the fireflood initial stage leaks into the lower or low-temperature oxidation of the crude oil temperature in shaft bottom, viscosity of crude is caused to become large, injection string of the present invention can inject the production fluid viscosity reduction that steam makes to leak into shaft bottom, be easy to give rise to ground), fireflood takes effect, and (draining section meets or exceeds the tiptoe place of horizontal production well in phase water filling cooling, now produced fluid temperature is higher, be up to 700 DEG C, exceed the resistance to extreme temperature 350 DEG C of net horizontal section flow string, injection string of the present invention can inject cold water and lower the temperature to it), monitoring tubing string is used for the temperature and pressure change of Real-Time Monitoring shaft bottom, contributes to adjusting manufacturing parameter, flow string meets the production requirement of fireflood whole production phase, and realizes the function of downhole oil-gas separation.By above three casing strings, making the present invention under the prerequisite without the need to repeatedly changing tubing string kill-job repeatedly, there is temperature and pressure Real-Time Monitoring, downhole oil-gas separation simultaneously, well control production fluid temperature and ensure multi-functional and the advantage of fireflood combustion efficiency.
2. the fireflood assisted gravity drainage production phase comprises warm-up phase, fireflood initial stage, fireflood take effect stage three phases, need to inject the pre-hot formation of high-quality steam in first stage horizontal production well, need steam injection to accompany hot auxiliary lifting in second stage, need water filling to lower the temperature at three phases; And the instlated tubular of injection string of the present invention can meet the requirement of high mass dryness fraction steam injection, the heat stage effect reducing heat waste can be reached auxiliary companion.Therefore, be reduce operations number, injection string selects instlated tubular, at the three phases of fireflood without the need to changing different instlated tubulars, reducing the frequent kill-job of horizontal production well in fireflood manufacturing process thus and live wire leading edge being stablized to the impact of propelling.
3., in the whole process due to fireflood production, gas-oil ratio scope is comparatively large, and for 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, by Action of Gravity Field, liquids and gases is separated.
4. the present invention is provided with gas prevention pump on gas anchor top, and gas prevention pump opens travelling valve by mechanical type, can prevent gas lock, reduces gas to the impact of pump efficiency, reaches the object of efficient lifting; And by the double action of gas prevention pump and gas anchor, realize downhole oil-gas separation, surface gathering and transferring pipeline and oil gas separation equipment can be reduced, reduce cost of investment, improve fireflood economic benefit, also can reduce to burn tail gas to the impact of pump efficiency.
5. intelligent temperature control device of the present invention is by Real-time Obtaining producing well well head and liquid generated underground temperature information, and collection analysis is carried out to temperature information, again by injecting pipeline, gas injection pipeline and electric heater unit carry out temperature actuated feedback moderately and at the right moment to producing well well head and downhole temperature, shaft bottom production fluid temperature is made to be between 200 ~ 300 DEG C, well head production fluid temperature is between crude oil inflection temperature to 150 DEG C, namely well head and liquid generated underground temperature all remain in controlled range and safe range, this application of installation is in production, whole temperature data acquisition, computing, feedback procedure is without the need to artificially adjusting intervention, for full-automation is implemented, both manpower was saved, turn avoid the industry temperature control because artificial adjustment causes not in time, thus a series of production problems caused, as: the damage reducing tubing string, reduce the has channeling in manufacturing process, reduce surface construction cost, promote the even propelling of live wire, improve oil displacement efficiency and the economic benefit of fireflood assisted gravity drainage.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of the fireflood assisted gravity drainage injection and extraction system that the present invention is based on intelligent temperature control.
Detailed description of the invention
For making goal of the invention of the present invention, technological means and technique effect have more complete and clearly disclose, being below described in detail, and seeing also accompanying drawing and part numbers.
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 overlap tubing string independent of each other, gas injection tube column is provided with in gas injection well 900, and for the intelligent temperature control device of intelligent control production fluid temperature, wherein:
Injection string 100 comprises the instlated tubular 1 of sequential concatenation, screen casing 12 and starting taper 13, monitoring tubing string 200 comprises the monitoring pipe 2 of sequential concatenation, screen casing 10 and starting taper 13, also be provided with multiple pressure tester 9 in described monitoring pipe 2, flow string 300 comprises the hollow stem 4 of sequential concatenation, gas prevention pump 5, gas anchor 6, screen casing 7 and starting taper 8;
Gas injection tube column comprises oil pipe 21 and the packer 14 of sequential concatenation, and gas injection tube column end is provided with horn mouth 15;
Intelligent temperature control device comprises the many groups thermal detector 11 be arranged in described monitoring tubing string 200, and is arranged on the temperature probe 23 on producing well 400 well head production flow line; Be arranged on ground surface end, in order to collect the data acquisition equipment 17 of down-hole and wellhead temperature, data acquisition equipment 17 connects described many group thermal detectors 11 and temperature probe 23 by multi-cable; For sending the control appliance 19 of temperature adjustment instructions according to the Output rusults of data acquisition equipment 17, input interface and the data acquisition equipment 17 of control appliance 19 are electrically connected; 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 being communicated in described injection string 100, the gas injection pipeline 92 being communicated in gas injection tube column 21 in described gas injection well 900 and stretches at least one of electric heater unit 41 three 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 head, and wherein, described injection string 100 and monitoring tubing string 200 are lowered into net horizontal section b, and described flow string 300 is only 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 and above-mentioned three output interface one_to_one corresponding.
Preferably, described injection pipeline 91 and gas injection pipeline 92 are equipped with the electromagnetic valve 16,20 for controlling flow, 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 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 arbitrarily there is programmable chip, and can such as, in order to the terminal of control hardware, computer.
Preferably, described pressure tester 9 is capillary tube, and described thermal detector 11 is thermocouple.
Preferably, the vertical distance of producing well 400 horizontal segment b end described in 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 is formed, its operating principle and method of operating as follows:
Producing well tubing string construction and installation order: first enter down injection string (instlated tubular) to tiptoe place, artificial bottom of a well (reserving safety operation distance), connects 3 ~ 6m screen casing; Enter to monitor tubing string down again, to tiptoe place, artificial bottom of a well (reserving safety operation distance), connect 2m screen casing; Finally enter flow string down, under warm-up phase is as far as possible dark (lower-continuous mapping is less than 55 ° of places in hole deviation), fireflood takes effect the phase, and lower-continuous mapping adjusts to straight well section.Well head connects three pipe well mouths, the enough three pipe independently workings in the arrangement space of three endowels in pit shaft.
Fireflood Preliminary division is three phases.First stage is the fireflood preproduction phase, and this stage mainly injects steam by injection string and gas injection tube column, preheating oil reservoir, sets up note, adopts thermal communication between well, for after-ignition and production are prepared; Second stage is fireflood initial stage, this stage live wire leading edge does not also arrive artificial bottom of a well tiptoe, dredge oil amount is less, production fluid temperature lower (minimum can lower than original inflection temperature, namely inflection temperature instigates thick oil viscosity obviously to reduce and the temperature condition suitable with common thin oil viscosity); Three phases is that fireflood takes effect the phase, this stage live wire leading edge oneself arrive horizontal well tiptoe place, dredge oil amount increases greatly, production fluid temperature higher (the highest may more than 700 DEG C).Below method of operating of the present invention is introduced stage by stage:
First stage: injection string and gas injection tube column inject steam, while injection steam, flow string is discharged the production fluid of pre-hot formation in time, thus improves stratum pre-heat effect, the temperature, pressure in monitoring tubing string Real-Time Monitoring shaft bottom, for judging whether that reaching pre-heat effect provides foundation.
Second stage: because production fluid temperature is lower, injection string still injects steam (injection rate is less than warm-up phase), and gas injection tube column changes air injection, assists fireflood to burn by air, improves production fluid temperature, namely accompany hot lifting by steam; Monitoring tubing string Real-Time Monitoring production fluid temperature, ensures that the injection rate of steam enough makes production fluid efficiently give rise to ground; Flow string is discharged production fluid in time, does not affect the effect of fireflood displacement; If inject the shortage of heat of steam so that production fluid is given rise to ground, namely drop to below inflection temperature in lifting process Crude Oil temperature, then need in the hollow stem of flow string under enter cable.
Three phases: due to production fluid temperature higher (the highest may more than 700 DEG C), the resistance to extreme temperature of tubing string may be exceeded, now, injection string injects cold water, to reduce the temperature of production fluid, i.e. water mixing cooling; Monitoring tubing string Real-Time Monitoring production fluid temperature, ensures that the injection rate of cold water enough makes production fluid temperature drop in safe range; Now Liquid output raises, and gas production also raises, and the pump of flow string need be promoted to straight well section (because gas anchor makes liquids and gases be separated by Action of Gravity Field), make 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 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 at the bottom of Horizontal Well and under pump is transferred in data acquisition equipment by thermocouple, and the temperature of well head is measured by temperature probe, by cable transmission to data acquisition equipment; Gather temperature by cable transmission in control appliance, according to Field Production Data preset a set of temperature threshold in control appliance, whether the temperature that programmed decision measures exceeds threshold range, then control appliance determines whether to need water filling cooling, steam injection companion heat, adjustment gas injection rate by result of determination, and set injection rate, and determine whether to need to open electrical heating; The control result exported by control appliance gives each temperature control executing agency by cable transmission, by electromagnetic valve adjustment waterflood injection rate, and adjustment gas injection rate, and be flow string heating by electrical heating switch control rule unlatching electric heater unit.Whole temperature data acquisition, computing, feedback procedure, without the need to artificially adjusting intervention, for full-automation is implemented, so both save manpower, turn avoid because artificial adjustment has serious consequences to production not in time.
The invention provides a kind of note mining method of fireflood assisted gravity drainage, apply fireflood assisted gravity drainage injection and extraction system as above, the method comprises:
Warm-up phase: simultaneously inject steam along producing well injection string and gas injection well gas injection tube column, meanwhile, discharges the production fluid of pre-hot formation along producing well flow string;
In the fireflood stage: continue steam injection along producing well injection string, gas injection well gas injection tube column stops steam injection, changes injection air, until production fluid gives rise to ground.
Method as above, in the described fireflood stage, when inject the shortage of heat of steam with lifting production fluid to ground time, open the electric heater unit auxiliary lifting of flow string.
Method as above, also comprises fireflood and takes effect the stage, take effect the stage in fireflood after production fluid gives rise to ground:
When horizontal production well shaft bottom production fluid temperature is more than 300 DEG C, and horizontal production well well head production fluid temperature higher than crude oil inflection temperature time, lower the temperature to underground water-injection along producing well injection string, and according to Liquid output setting waterflood injection rate, reduce gas injection well gas injection rate simultaneously;
When horizontal production well shaft bottom production fluid temperature is more than 300 DEG C, and horizontal production well well head production fluid temperature lower than crude oil inflection temperature time, lower the temperature along producing well injection string to underground water-injection, and according to Liquid output setting waterflood injection rate, open electric heater unit simultaneously, and reduce gas injection well gas injection rate;
When horizontal production well shaft bottom production fluid temperature is lower than 200 DEG C, and horizontal production well well head production fluid temperature lower than crude oil inflection temperature time, heat up along producing well injection string to down-hole steam injection, and according to Liquid output setting steam injection speed, improve gas injection well gas injection rate simultaneously.
Method as above, takes effect the stage in described fireflood, the gas anchor of flow string is promoted to straight well section to make the gas-liquid separation of down-hole.
Above act is only the schematic section Example of the present invention; and be not used to limit the scope of the invention; any those skilled in the art, equivalent variations done under the prerequisite not departing from design of the present invention and principle and amendment, all should be included within this patent protection domain.
Claims (14)
1. the 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 overlap tubing string independent of each other, gas injection tube column is provided with in gas injection well, and for the intelligent temperature control device of intelligent control production fluid temperature, wherein:
Injection string comprises the instlated tubular of sequential concatenation, screen casing and starting taper, monitoring tubing string comprises the monitoring pipe of sequential concatenation, screen casing and starting taper, also be provided with multiple pressure tester in described monitoring pipe, flow string comprises the hollow stem of sequential concatenation, gas prevention pump, gas anchor, screen casing and starting taper;
Gas injection tube column comprises oil pipe and the packer of sequential concatenation, and gas injection tube column end is provided with horn mouth;
Intelligent temperature control device comprises the many groups thermal detector be arranged in described monitoring tubing string, and is arranged on the temperature probe on producing well well head production flow line; Be arranged on ground surface end, in order to collect the data acquisition equipment of down-hole and wellhead temperature, data acquisition equipment connects described many group thermal detectors and temperature probe by multi-cable; For sending the control appliance of temperature adjustment instructions according to the Output rusults of data acquisition equipment, the input interface of control appliance and data acquisition equipment are electrically connected; 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 being communicated in described injection string, the gas injection pipeline being communicated in gas injection tube column in described gas injection well and stretches at least one of 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 producing well well head, wherein, described injection string and monitoring tubing string are lowered into net horizontal section, and described flow string is only lowered into 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 and above-mentioned three output interface one_to_one corresponding.
5. injection and extraction system according to claim 4, is characterized in that, described injection pipeline and gas injection pipeline are equipped with the electromagnetic valve for controlling flow, 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 controlled by described control appliance, and electrical heating switch is electrically connected at the output interface of described control appliance.
7. the injection and extraction system according to any one of claim 1-6, is characterized in that, described data acquisition equipment is data collecting card.
8. the injection and extraction system according to any one of claim 1-6, is characterized in that, described control appliance is programmable logic controller or single-chip microcomputer.
9. the injection and extraction system according to any one of claim 1-6, is characterized in that, described pressure tester is capillary tube, and described thermal detector is thermocouple.
10. the injection and extraction system according to any one of claim 1-6, is characterized in that, the vertical distance of producing well horizontal segment end described in the bottom hole spacing of described gas injection well and horizontal range are all between 5-10m.
The note mining method of 11. 1 kinds of fireflood assisted gravity drainages, apply fireflood assisted gravity drainage injection and extraction system as claimed in claim 1, the method comprises:
Warm-up phase: simultaneously inject steam along producing well injection string and gas injection well gas injection tube column, meanwhile, discharges the production fluid of pre-hot formation along producing well flow string;
In the fireflood stage: continue steam injection along producing well injection string, gas injection well gas injection tube column stops steam injection, changes injection air, until production fluid gives rise to ground.
12. methods according to claim 11, is characterized in that:
In the described fireflood stage, when inject the shortage of heat of steam with lifting production fluid to ground time, open the electric heater unit auxiliary lifting of flow string.
13. methods according to claim 11 or 12, is characterized in that, also comprise fireflood and take effect the stage, take effect the stage in fireflood after production fluid gives rise to ground:
When horizontal production well shaft bottom production fluid temperature is more than 300 DEG C, and horizontal production well well head production fluid temperature higher than crude oil inflection temperature time, lower the temperature to underground water-injection along producing well injection string, and according to Liquid output setting waterflood injection rate, reduce gas injection well gas injection rate simultaneously;
When horizontal production well shaft bottom production fluid temperature is more than 300 DEG C, and horizontal production well well head production fluid temperature lower than crude oil inflection temperature time, lower the temperature along producing well injection string to underground water-injection, and according to Liquid output setting waterflood injection rate, open electric heater unit simultaneously, and reduce gas injection well gas injection rate;
When horizontal production well shaft bottom production fluid temperature is lower than 200 DEG C, and horizontal production well well head production fluid temperature lower than crude oil inflection temperature time, heat up along producing well injection string to down-hole steam injection, and according to Liquid output setting steam injection speed, improve gas injection well gas injection rate simultaneously.
14. methods according to claim 13, is characterized in that:
Take effect the stage in described fireflood, the gas anchor of flow string is promoted to straight well section to make 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 | Fireflooding assisted gravity drainage injection and production system and injection and production method based on intelligent temperature control |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310205549.XA CN103277077B (en) | 2013-05-29 | 2013-05-29 | Fireflooding assisted gravity drainage injection and production system and injection and production method based on intelligent temperature control |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103277077A CN103277077A (en) | 2013-09-04 |
| CN103277077B true 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 | Fireflooding assisted gravity drainage injection and production system and injection and production method based on intelligent temperature control |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103277077B (en) |
Families Citing this family (7)
| 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 |
| CN105587304A (en) * | 2014-10-23 | 2016-05-18 | 中国石油天然气股份有限公司 | Fireflood ignition monitoring system |
| CN105672977B (en) * | 2014-11-21 | 2019-06-11 | 中国石油天然气股份有限公司 | Horizontal well system and exploitation method for horizontal well oil drainage |
| CN106968649B (en) * | 2017-04-27 | 2019-12-10 | 中国石油天然气股份有限公司 | Ignition method and exploitation method for steam channeling oil reservoir |
| CN107795309B (en) * | 2017-11-10 | 2020-02-14 | 中国石油天然气股份有限公司 | Heavy oil production pipe column and oil production method thereof |
| CN107869341B (en) * | 2017-11-10 | 2020-12-01 | 中国石油天然气股份有限公司 | Heavy oil production system and method |
| CN113700462B (en) * | 2020-05-21 | 2023-04-07 | 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 (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102213089A (en) * | 2011-06-02 | 2011-10-12 | 中国石油天然气股份有限公司 | Oil extraction method and oil extraction system for 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 wellhead 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 auxiliary gravity draining oil injection and production system based on intelligent temperature control |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA2552482C (en) * | 2006-07-19 | 2015-02-24 | N-Solv Corporation | Methods and apparatuses for enhanced in situ hydrocarbon production |
-
2013
- 2013-05-29 CN CN201310205549.XA patent/CN103277077B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102213089A (en) * | 2011-06-02 | 2011-10-12 | 中国石油天然气股份有限公司 | Oil extraction method and oil extraction system for 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 wellhead 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 auxiliary gravity draining oil injection and production system based on intelligent temperature control |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103277077A (en) | 2013-09-04 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103277077B (en) | Fireflooding assisted gravity drainage injection and production system and injection and production method based on intelligent temperature control | |
| CN103615224B (en) | Method for exploiting heavy oil reservoir by improving steam assisted gravity drainage through solvent and well pattern structure | |
| CN102678096B (en) | Method for exploiting high-pour-point oil reservoir through hot water assisted gravity drainage | |
| CN103615225B (en) | Double-horizontal-well isothermal difference forced steam circulation preheating method for middle-deep layer oil reservoir | |
| RU2436943C1 (en) | Procedure for extraction of high viscous oil from deviating hole by method of steam cyclic pumping into reservoir | |
| US20070284107A1 (en) | Heavy Oil Recovery and Apparatus | |
| 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 | |
| US11306570B2 (en) | Fishbones, electric heaters and proppant to produce oil | |
| CN203394444U (en) | Fireflooding assisted gravity drainage injection production process system | |
| CN204371284U (en) | Well pattern structure for adjusting fire flooding auxiliary gravity drainage live wire form by utilizing exhaust well | |
| CN203515532U (en) | Continuous tube type horizontal well downhole electric heating device | |
| CN103321618A (en) | Oil shale in-situ mining method | |
| CN204511401U (en) | A kind of Intelligent testing adjusts selective sand control separate layer water injection string | |
| CN203394488U (en) | Fireflood auxiliary gravity draining oil injection and production system based on intelligent temperature control | |
| CN203394482U (en) | Thickened oil exploitation device for horizontal well | |
| CN203808959U (en) | Injection-production system | |
| CA2931882A1 (en) | Method for forced steam cycle preheating dual horizontal well in middle-deep layer reservoir under a constant temperature difference | |
| CN103195402B (en) | A kind of system and method for staged fracturing of coal bed gas well | |
| CN104653155A (en) | Exploratory well electric pump oil testing and production testing drainage device and system | |
| CN202956353U (en) | Experimental device for annular medium heat insulation effect of hot water drive oil production shaft | |
| WO2021160083A1 (en) | Downhole preheating starting method for super heavy oil reservoir developed by means of dual-horizontal-well sagd | |
| CN105257288A (en) | Method for determining tight reservoir original reservoir pressure based on injection pressure decline well testing technology | |
| RU2749658C1 (en) | Method for developing high-viscosity oil deposits by cyclic steam method | |
| CN203394489U (en) | Intelligent temperature control device for fireflooding assisted gravity oil drainage |
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 |