CN113622832A - Offshore thermal recovery external cable electric submersible pump injection-production integrated pipe column and operation method - Google Patents
Offshore thermal recovery external cable electric submersible pump injection-production integrated pipe column and operation method Download PDFInfo
- Publication number
- CN113622832A CN113622832A CN202110876173.XA CN202110876173A CN113622832A CN 113622832 A CN113622832 A CN 113622832A CN 202110876173 A CN202110876173 A CN 202110876173A CN 113622832 A CN113622832 A CN 113622832A
- Authority
- CN
- China
- Prior art keywords
- thermal recovery
- oil pipe
- heat insulation
- submersible pump
- electric submersible
- 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.)
- Pending
Links
- 238000011084 recovery Methods 0.000 title claims abstract description 87
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 58
- 238000000034 method Methods 0.000 title claims abstract description 11
- 238000009413 insulation Methods 0.000 claims abstract description 72
- 239000004964 aerogel Substances 0.000 claims abstract description 58
- 239000013307 optical fiber Substances 0.000 claims abstract description 21
- 239000003921 oil Substances 0.000 claims description 110
- 239000000295 fuel oil Substances 0.000 claims description 22
- 238000002347 injection Methods 0.000 claims description 21
- 239000007924 injection Substances 0.000 claims description 21
- 238000010793 Steam injection (oil industry) Methods 0.000 claims description 19
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 15
- 239000012530 fluid Substances 0.000 claims description 14
- 230000015572 biosynthetic process Effects 0.000 claims description 7
- 239000007789 gas Substances 0.000 claims description 7
- 229910052757 nitrogen Inorganic materials 0.000 claims description 7
- 229910052500 inorganic mineral Inorganic materials 0.000 claims description 3
- 239000007788 liquid Substances 0.000 claims description 3
- 230000000149 penetrating effect Effects 0.000 claims description 3
- 238000002791 soaking Methods 0.000 claims description 3
- 238000011161 development Methods 0.000 description 10
- 238000010586 diagram Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 2
- 230000002595 cold damage Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000000605 extraction Methods 0.000 description 2
- 238000005086 pumping Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 238000011010 flushing procedure Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 239000003129 oil well Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/16—Enhanced recovery methods for obtaining hydrocarbons
- E21B43/20—Displacing by water
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/16—Enhanced recovery methods for obtaining hydrocarbons
- E21B43/24—Enhanced recovery methods for obtaining hydrocarbons using heat, e.g. steam injection
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B47/00—Survey of boreholes or wells
- E21B47/06—Measuring temperature or pressure
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B47/00—Survey of boreholes or wells
- E21B47/06—Measuring temperature or pressure
- E21B47/07—Temperature
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D13/00—Pumping installations or systems
- F04D13/02—Units comprising pumps and their driving means
- F04D13/06—Units comprising pumps and their driving means the pump being electrically driven
- F04D13/08—Units comprising pumps and their driving means the pump being electrically driven for submerged use
- F04D13/10—Units comprising pumps and their driving means the pump being electrically driven for submerged use adapted for use in mining bore holes
Landscapes
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Geology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Mechanical Engineering (AREA)
- Geophysics (AREA)
- General Engineering & Computer Science (AREA)
- Earth Drilling (AREA)
Abstract
The invention discloses an offshore thermal recovery external cable electric submersible pump injection-recovery integrated pipe column and an operation method, wherein the integrated pipe column comprises a first aerogel heat-insulation oil pipe, a deep well safety valve, a thermal recovery packer, a second aerogel heat-insulation oil pipe, a common oil pipe and a guide shoe which are sequentially connected from top to bottom; the integrated pipe column also comprises an electric submersible pump system, wherein the electric submersible pump system is detachably arranged in the first aerogel heat insulation oil pipe and comprises a continuous oil pipe, a pump, a motor and a wet joint inner cylinder which are sequentially connected from top to bottom; the integrated tubular column further comprises a high-temperature optical fiber, a first hydraulic control pipeline, a second hydraulic control pipeline and a large flat cable, wherein the first hydraulic control pipeline is used for controlling the air release valve; the second hydraulic control pipeline is used for controlling a deep well safety valve, and the large flat cable is used for controlling a pump. When the stratum needs to annotate steam, play the electric submersible pump system, can realize annotating high-temperature steam, when annotating steam and ending need the production of charge pump, descend the electric submersible pump system, can realize annotating the free switching between steam and production through having put down the electric submersible pump, it is simple and convenient high-efficient.
Description
Technical Field
The invention relates to an offshore heavy oil thermal recovery development oil extraction process, in particular to an offshore thermal recovery external cable electric submersible pump injection-production integrated tubular column and an operation method.
Background
The thick oil thermal recovery is to inject a certain amount of steam into the thick oil well in a short time and continuously, then soak the well for a period of time to diffuse the steam heat to the deep part of the oil layer, then start the pump to produce, when the instantaneous oil production or the bottom hole flow temperature is reduced to a certain level, enter the next steam injection, soak the well and oil extraction stage, the steps are repeated in such a way, the cycle is circulated, and the steam heat utilization rate determines the quality of the thermal recovery development effect.
The offshore platform area space is little, and steam is taken in and send out thermal recovery temperature pressure height, and at present home and abroad does not have the notes that is suitable for offshore platform viscous crude steam and takes in and send out the integrated mode of exploiting completely, and the operation mode of annotating hot tubular column and production tubular column two-trip tubular column is generally taken in marine thermal recovery, promptly: the heat injection pipe column is replaced by the platform workover before steam injection of the heavy oil well, and the production pipe column is replaced by the workover after the soaking blowout is finished, so that the method has the following defects: firstly, well workover is carried out by washing and killing a well with cold fluid and tripping a tubular column, steam heat energy in a near-wellbore area is consumed by the cold fluid, the heat utilization rate is reduced, and the thermal recovery development effect is influenced; secondly, the drilling and workover rig occupies operation resources for a long time, and the reserve utilization of the platform heavy oil well is influenced; the offshore well workover operation cost is high, and the back-and-forth operation increases the offshore heavy oil development cost; and fourthly, the pipe string is pulled out and put down for a long time, the integrity of the platform heavy oil well casing is also influenced, and the safety development risk is brought. The integrated tubular column mode of 'pumping unit + heat insulation oil pipe + wear-resisting sucker rod + thick pump' is adopted to the land usually, but the sea space is limited, can't put the huge machine of knocking one's head of size, and the pole pipe corrodes the problem of eccentric wear and also can bring the safety risk. Therefore, a low-cost and high-efficiency injection-production integrated mode suitable for offshore heavy oil thermal production development needs to be developed.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provides an injection-production integrated tubular column of an offshore thermal production external cable electric submersible pump and an operation method. The invention designs a low-cost high-efficiency steam injection and production transfer integrated device and an operation method suitable for offshore platform heavy oil well steam huff and puff development aiming at the characteristic that the steam huff and puff development of the offshore heavy oil well frequently pulls out and pulls out a pipe column through a workover rig.
The technical scheme adopted by the invention is as follows: an offshore thermal recovery external cable electric submersible pump injection-production integrated pipe column is arranged in an original well casing, an oil casing annulus is formed between the integrated pipe column and the original well casing, and a thermal recovery well mouth is installed on the original well casing;
the integrated pipe column comprises a first aerogel heat-insulation oil pipe, a deep well safety valve, a thermal recovery packer, a second aerogel heat-insulation oil pipe, a common oil pipe and a guide shoe which are sequentially connected from top to bottom; wherein the first aerogel heat insulation oil pipe is hung on the thermal recovery wellhead; the thermal recovery packer is set on the original well casing, and a gas release valve is arranged on one side of the thermal recovery packer; the second aerogel heat insulation oil pipe is connected with the common oil pipe through a Y joint; the common oil pipe and the guide shoe are positioned in the horizontal section of the original well casing, and a plurality of injection valves are arranged on the common oil pipe at intervals;
the integrated pipe column further comprises an electric submersible pump system, the electric submersible pump system is detachably arranged in the first aerogel heat insulation oil pipe and comprises a continuous oil pipe, a pump, a motor and a wet joint inner cylinder which are sequentially connected from top to bottom, a wet joint outer cylinder which is matched and connected with the wet joint inner cylinder is arranged at the bottom of the first aerogel heat insulation oil pipe, and the wet joint inner cylinder and the wet joint outer cylinder are detachably connected with each other; the coiled tubing is hung on the thermal recovery wellhead;
the integrated tubular column further comprises a high-temperature optical fiber, a first hydraulic control pipeline, a second hydraulic control pipeline and a large flat cable; the high-temperature optical fiber is arranged in a common oil pipe, one end of the high-temperature optical fiber is connected with the guide shoe, the other end of the high-temperature optical fiber penetrates through the Y joint and then enters an oil sleeve annulus, and the high-temperature optical fiber is connected with a ground system after sequentially penetrating through the thermal recovery packer and the thermal recovery wellhead; the first hydraulic control pipeline is used for controlling the air release valve, one end of the first hydraulic control pipeline is connected with the air release valve, and the other end of the first hydraulic control pipeline penetrates through the thermal recovery wellhead to be connected with a ground control system; the second hydraulic control pipeline is used for controlling the deep well safety valve, one end of the second hydraulic control pipeline is connected with the deep well safety valve, and the other end of the second hydraulic control pipeline penetrates through the thermal recovery wellhead to be connected with the ground control system; the large flat cable is used for controlling the pump, one end of the large flat cable is connected to the wet joint outer cylinder, and the other end of the large flat cable penetrates out of the wet joint outer cylinder and penetrates through the thermal recovery wellhead to be connected with a ground electric pump control system.
Furthermore, the upper end of the deep well safety valve is connected with a first heat insulation short section, and the first heat insulation short section is connected with the first aerogel heat insulation oil pipe through a heat insulation buckle; the lower end of the deep well safety valve is connected with a second heat insulation short section, and the second heat insulation short section is connected with the thermal recovery packer.
Further, the diameter of first aerogel thermal-insulated oil pipe is 7 inches, the diameter of second aerogel thermal-insulated oil pipe is 4.5 inches.
Furthermore, the guide shoe adopts a guide shoe with a chamfer and an inclined opening.
Further, the diameters of the first pilot control pipeline, the second pilot control pipeline and the high-temperature optical fiber are all 1/4 inches.
Furthermore, the large flat cable is an inorganic mineral insulated cable and meets the requirements of thermal recovery working conditions.
Furthermore, the thermal recovery packer, the air release valve and the deep well safety valve can resist the temperature of 350 ℃ and the pressure of 21 MPa.
The other technical scheme adopted by the invention is as follows: an operation method based on the integrated pipe column comprises the following steps:
when the heavy oil well needs to inject steam
The ground control system closes the deep well safety valve and the air release valve, after the electric submersible pump system in the first aerogel heat insulation oil pipe is lifted out, the ground control system pressurizes and opens the deep well safety valve and the air release valve, high-temperature steam enters the stratum after passing through the thermal recovery well head, the first aerogel heat insulation oil pipe, the deep well safety valve, the thermal recovery packer, the second aerogel heat insulation oil pipe, the Y joint, the common oil pipe and the injection allocation valve, and high-purity nitrogen enters the stratum after passing through the thermal recovery well head, the oil sleeve annulus and the air release valve, so that the high-temperature steam injection working condition is realized;
(II) when the steam injection is finished and the soaking is finished, the open flow operation of the heavy oil well is required to be carried out
After confirming the ground open flow, firstly carrying out oil pressure relief, and enabling open flow well liquid to enter a ground open flow pipeline after passing through a distribution valve, a common oil pipe, a Y joint, a second aerogel heat insulation oil pipe, a thermal recovery packer, a deep well safety valve, a first aerogel heat insulation oil pipe and a thermal recovery wellhead; when the oil pressure is released, sleeve pressure is released, and sleeve gas enters a ground blowout flow after passing through an air release valve, an oil sleeve annulus and a thermal production wellhead to realize the blowout working condition of high-temperature well fluid;
(III) when the open flow finishes the heavy oil well and needs to produce
The electric submersible pump system in the first aerogel heat insulation oil pipe is lowered to the designed well depth, the ground electric pump control cabinet starts the electric submersible pump system to produce, and the formation fluid enters the formation production flow after passing through the injection valve, the common oil pipe, the Y joint, the second aerogel heat insulation oil pipe, the thermal recovery packer, the deep well safety valve, the pump, the continuous oil pipe and the thermal recovery wellhead, so that the production working condition of the electric submersible pump after steam injection is realized.
The invention has the beneficial effects that: the invention provides a brand-new heat injection and production conversion integrated tubular column mode, reduces the risk of formation cold damage caused by the leakage of flushing and killing fluid during frequent workover operation of the offshore heavy oil well, and improves the heat energy utilization rate; the cost investment of offshore thermal recovery operation is reduced, and the overall development benefit of thermal recovery is improved; the operation efficiency of the conversion from heat injection construction to pump production of the offshore thermal production well is improved, and the manual labor intensity and the safety risk are reduced; the production time rate of the heavy oil production well of the thermal recovery platform is improved, and the realization of the peak yield of thermal recovery is ensured. Meanwhile, the pipe column mode can also realize the high-temperature and high-pressure parameter monitoring of the whole well barrel in the whole time domain in the steam injection operation, the well stewing operation, the open flow operation and the pumping production process, and provides data support for the dynamic adjustment of the heat injection parameter of one round in the heavy oil thermal recovery well.
Drawings
FIG. 1: the invention relates to a schematic diagram of the integral structure of an injection-production integrated tubular column of an offshore thermal production external cable electric submersible pump;
FIG. 2: the invention relates to a high-temperature steam injection working condition implementation state diagram;
FIG. 3: the invention relates to a high-temperature well fluid blowout working condition implementation state diagram;
FIG. 4: the invention relates to an electric submersible pump production working condition implementation state diagram.
The attached drawings are marked as follows:
1-guide shoe; 2-common oil pipe;
3-high temperature optical fiber; 4-dispensing valve;
5-Y linker; 6-second aerogel heat insulation oil pipe;
7-thermal production packer; 8-air release valve;
9-second insulating short section; 10-deep well safety valve;
11-first insulating sub; 12-heat insulation buckle changing;
13-wet joint outer cylinder; 14-first aerogel insulation tubing;
15-first pilot line; 16-a second pilot line;
17-cable buckle; 18-large flat cable;
19-wet joint inner barrel; 20-an electric motor;
21-a pump; 22-coiled tubing joint;
23-coiled tubing; 24-original well casing;
25-high temperature steam; 26-high purity nitrogen;
27-blowout well fluid; 28-casing gas;
29-formation fluid.
Detailed Description
In order to further understand the contents, features and effects of the present invention, the following embodiments are illustrated and described in detail with reference to the accompanying drawings:
as shown in the attached drawings 1 to 4, an offshore thermal recovery external cable electric submersible pump injection-production integrated pipe column is arranged in an original well casing 24, an oil casing annulus is formed between the integrated pipe column and the original well casing 24, and a thermal recovery wellhead is installed on the original well casing 24.
The integrated tubular column comprises a first aerogel heat insulation oil pipe 14, a first heat insulation short section 11, a deep well safety valve 10, a second heat insulation short section 9, a thermal recovery packer 7, a second aerogel heat insulation oil pipe 6, a common oil pipe 2 and a guide shoe 1 which are sequentially connected from top to bottom. The first aerogel heat insulation oil pipe 14 is hung on the thermal recovery wellhead, and the diameter of the first aerogel heat insulation oil pipe 14 is 7 inches. The first heat insulation short joint 11 is connected with the first aerogel heat insulation oil pipe 14 through a heat insulation buckle. The thermal production packer 7 is set on the original well casing 24, and a deflation valve 8 is arranged on one side of the thermal production packer 7. The second aerogel heat insulation oil pipe 6 is connected with the common oil pipe 2 through a Y joint 5, and the diameter of the second aerogel heat insulation oil pipe 6 is 4.5 inches. The common oil pipe 2 and the guide shoe 1 are positioned in the horizontal section of the original well casing 24, and a plurality of injection valves 4 are uniformly arranged on the common oil pipe 2 at equal intervals; the guide shoe 1 is a guide shoe with a chamfer and an oblique opening. Wherein the thermal recovery packer 7, the air release valve 8 and the deep well safety valve 10 are resistant to 350 ℃ and 21 MPa.
The integrated tubular column further comprises an electric submersible pump system, wherein the electric submersible pump system is detachably arranged in the first aerogel heat insulation oil pipe 14 and comprises a continuous oil pipe 23, a pump 21, a motor 20 and a wet joint inner barrel 19 which are sequentially connected from top to bottom. The bottom of the first aerogel heat insulation oil pipe 14 is provided with a wet joint outer cylinder 13 which is matched and connected with the wet joint inner cylinder 19, and the wet joint inner cylinder 19 and the wet joint outer cylinder 13 are detachably connected with each other. The coiled tubing 23 is hung on the thermal production wellhead, and the coiled tubing 23 is connected with the pump 21 through a coiled tubing joint 22.
The integrated pipe column further comprises a high-temperature optical fiber 3, a first hydraulic control pipeline 15, a second hydraulic control pipeline 16 and a large flat cable 18. The high-temperature optical fiber 3 is arranged in a common oil pipe 2, one end of the high-temperature optical fiber 3 is connected with the guide shoe 1, the other end of the high-temperature optical fiber penetrates through the Y-shaped joint 5 and then enters an oil sleeve annulus, and the high-temperature optical fiber is connected with a ground system after sequentially penetrating through the thermal recovery packer 7 and the thermal recovery wellhead. The first hydraulic control pipeline 15 is used for controlling the air release valve 8, one end of the first hydraulic control pipeline 15 is connected with the air release valve 8, and the other end of the first hydraulic control pipeline passes through the thermal recovery wellhead and is connected with a ground control system. The second hydraulic control pipeline 16 is used for controlling the deep well safety valve 10, one end of the second hydraulic control pipeline 16 is connected with the deep well safety valve 10, and the other end of the second hydraulic control pipeline passes through the thermal recovery wellhead to be connected with the ground control system. The large flat cable 18 is used for controlling the pump 21, one end of the large flat cable 18 is connected to the wet joint outer cylinder 13, and the other end of the large flat cable 18 penetrates out of the wet joint outer cylinder 13 and penetrates through the thermal recovery wellhead to be connected with a ground electric pump control system. The diameters of the first pilot control pipeline 15, the second pilot control pipeline 16 and the high-temperature optical fiber 3 are all 1/4 inches; the large flat cable 18 is an inorganic mineral insulated cable, and meets the requirements of thermal recovery working conditions. In addition, the large flat cable 18 is fixed on the outer wall of the first aerogel heat insulation oil pipe 14 through a cable buckle 17, when steam needs to be injected into a stratum, the coiled oil pipe 23 is used for pulling out the electric submersible pump system, high-temperature steam 25 can be injected, when the electric pump needs to be put down for production after steam injection is finished, the coiled oil pipe 23 is used for putting down the electric submersible pump system, and the electric submersible pump can be pulled out through the coiled oil pipe on the ground, so that free switching between steam injection and production can be achieved, and the large flat cable is simple, convenient and efficient.
When the offshore thermal recovery external cable electric submersible pump injection-production integrated pipe column is used, as shown in figure 1, the connected external cable integrated pipe column is put into a production sleeve, and an electric pump is started on the ground to normally produce.
As shown in fig. 2, when the production of the heavy oil well is difficult and steam injection needs to be carried out, the ground control system closes the deep well safety valve 10 and the air release valve 8 to prevent the swabbing phenomenon and the wash-and-kill well from polluting the stratum during pipe string production, and after the electric submersible pump system in the first aerogel heat insulation oil pipe 14 is lifted out through the coiled tubing ground device, the ground control system pressurizes and opens the deep well safety valve 10 and the air release valve 8, and at the moment, a steam injection channel and a circular air nitrogen injection channel are established. The high-temperature steam 25 enters the stratum after passing through a thermal recovery wellhead, a first aerogel heat insulation oil pipe 14, a deep well safety valve 10, a thermal recovery packer 7, a second aerogel heat insulation oil pipe 6, a Y joint 5, a common oil pipe 2 and an injection allocation valve 4, and the high-purity nitrogen 26 enters the stratum after passing through the thermal recovery wellhead, an oil sleeve annulus and an air release valve 8, so that the injection working condition of the high-temperature steam 25 is realized;
as shown in fig. 3, after the steam injection and the shut-in are finished, the blowout operation of the heavy oil well needs to be performed, after the ground blowout flow is confirmed, the oil pressure is firstly released, and the blowout well fluid 27 enters the ground blowout pipeline through the injection valve 4, the common oil pipe 2, the Y joint 5, the second aerogel heat insulation oil pipe 6, the thermal recovery packer 7, the deep well safety valve 10, the first aerogel heat insulation oil pipe 14 and the thermal recovery wellhead. When the oil pressure is released, sleeve pressure is released, and sleeve gas 28 enters a ground blowout flow after passing through a gas release valve 8, an oil sleeve annulus and a thermal production wellhead to realize the blowout working condition of high-temperature well fluid;
as shown in fig. 4, when the heavy oil well needs to be produced after blowout, the coiled tubing ground device puts the electric submersible pump system in the first aerogel heat insulation oil pipe 14 into the designed well depth, the electric submersible pump system is started to produce through the ground electric pump control cabinet, and the formation fluid 29 enters the formation production flow through the injection valve 4, the common oil pipe 2, the Y joint 5, the second aerogel heat insulation oil pipe 6, the thermal recovery packer 7, the deep well safety valve 10, the pump 21, the coiled tubing 23 and the thermal recovery wellhead, so that the production condition of the electric submersible pump after steam injection is realized.
The working principle of the injection-production integrated tubular column of the offshore thermal production external cable electric submersible pump is as follows:
when the heavy oil well needs steam injection operation, an electric submersible pump system in the first aerogel heat insulation oil pipe 14 is started up through a coiled tubing ground device, a ground hydraulic control system opens the deep well safety valve 10 and the air release valve 8, then a steam injection channel and a nitrogen injection channel are established, high-temperature steam 25 enters the stratum through the first aerogel heat insulation oil pipe 14, and high-purity nitrogen 26 enters the stratum through the annular space of the first aerogel heat insulation oil pipe 14 and the original well casing pipe 24. When the pump 21 needs to be lowered to produce in the heavy oil well, the coiled tubing ground device lowers the electric submersible pump system in the first aerogel heat insulation oil pipe 14 to the designed well depth, and the electric pump production is started through the ground electric pump control cabinet.
In the invention, the free switching of injection and production is realized by the way that the coiled tubing 23 is used for tripping the electric submersible pump, the influence of well deviation is avoided, the cold damage of the working fluid to the stratum during frequent workover operation can be avoided, and the heat utilization rate and the thermal production development effect are improved.
Meanwhile, the injection-production integrated tubular column of the offshore thermal production external cable electric submersible pump is provided with a full-shaft high-temperature optical fiber 3 testing function, so that the conditions of the steam injection full-shaft and the liquid production profile of the horizontal section in the production stage can be mastered in real time.
Although the preferred embodiments of the present invention have been described above with reference to the accompanying drawings, the present invention is not limited to the above-described embodiments, which are merely illustrative and not restrictive, and those skilled in the art can make many modifications without departing from the spirit and scope of the present invention as defined in the appended claims.
Claims (8)
1. An offshore thermal recovery external cable electric submersible pump injection and recovery integrated pipe column is characterized in that the integrated pipe column is arranged in an original well casing (24), an oil casing annulus is formed between the integrated pipe column and the original well casing (24), and a thermal recovery well head is installed on the original well casing (24);
the integrated pipe column comprises a first aerogel heat-insulation oil pipe (14), a deep well safety valve (10), a thermal recovery packer (7), a second aerogel heat-insulation oil pipe (6), a common oil pipe (2) and a guide shoe (1) which are sequentially connected from top to bottom; wherein the first aerogel thermal insulation tubing (14) is suspended on the thermal recovery wellhead; the thermal recovery packer (7) is set on the original well casing pipe (24), and a release valve (8) is arranged on one side of the thermal recovery packer (7); the second aerogel heat insulation oil pipe (6) is connected with the common oil pipe (2) through a Y joint (5); the common oil pipe (2) and the guide shoe (1) are positioned in the horizontal section of the original well casing (24), and a plurality of injection valves (4) are arranged on the common oil pipe (2) at intervals;
the integrated pipe column further comprises an electric submersible pump system, the electric submersible pump system is detachably arranged in the first aerogel heat insulation oil pipe (14) and comprises a continuous oil pipe (23), a pump (21), a motor (20) and a wet joint inner cylinder (19) which are sequentially connected from top to bottom, a wet joint outer cylinder (13) which is matched and connected with the wet joint inner cylinder (19) is arranged at the bottom of the first aerogel heat insulation oil pipe (14), and the wet joint inner cylinder (19) and the wet joint outer cylinder (13) are detachably connected with each other; the coiled tubing (23) is hung on the thermal recovery wellhead;
the integrated pipe column further comprises a high-temperature optical fiber (3), a first hydraulic control pipeline (15), a second hydraulic control pipeline (16) and a large flat cable (18); the high-temperature optical fiber (3) is arranged in a common oil pipe (2), one end of the high-temperature optical fiber (3) is connected with the guide shoe (1), the other end of the high-temperature optical fiber penetrates through the Y joint (5) and then enters an oil sleeve annulus, and the high-temperature optical fiber is connected with a ground system after sequentially penetrating through the thermal recovery packer (7) and the thermal recovery wellhead; the first hydraulic control pipeline (15) is used for controlling the air release valve (8), one end of the first hydraulic control pipeline (15) is connected with the air release valve (8), and the other end of the first hydraulic control pipeline penetrates through the thermal recovery wellhead to be connected with a ground control system; the second hydraulic control pipeline (16) is used for controlling the deep well safety valve (10), one end of the second hydraulic control pipeline (16) is connected with the deep well safety valve (10), and the other end of the second hydraulic control pipeline penetrates through the thermal recovery wellhead to be connected with the ground control system; the large flat cable (18) is used for controlling the pump (21), one end of the large flat cable (18) is connected to the wet joint outer cylinder (13), and the other end of the large flat cable penetrates out of the wet joint outer cylinder (13) and penetrates through the thermal recovery wellhead to be connected with a ground electric pump control system.
2. The offshore thermal recovery external cable electric submersible pump injection-production integrated tubular column according to claim 1, characterized in that a first heat insulation short section (11) is connected to the upper end of the deep well safety valve (10), and the first heat insulation short section (11) is connected with the first aerogel heat insulation oil pipe (14) through a heat insulation buckle (12); the lower end of the deep well safety valve (10) is connected with a second heat insulation short section (9), and the second heat insulation short section (9) is connected with the thermal recovery packer (7).
3. The offshore thermal recovery external cable electric submersible pump injection-production integrated tubular column according to claim 1, wherein the diameter of the first aerogel heat insulation oil pipe (14) is 7 inches, and the diameter of the second aerogel heat insulation oil pipe (6) is 4.5 inches.
4. The offshore thermal recovery external cable electric submersible pump injection-production integrated pipe column according to claim 1, wherein the guide shoe (1) is a guide shoe with a chamfer and an oblique opening.
5. The offshore thermal recovery external cable electric submersible pump injection-production integrated pipe column according to claim 1, wherein the first hydraulic control pipeline (15), the second hydraulic control pipeline (16) and the high-temperature optical fiber (3) are 1/4 inches in diameter.
6. The offshore thermal recovery external cable electric submersible pump injection-production integrated pipe column according to claim 1, wherein the large flat cable (18) is an inorganic mineral insulated cable and meets the thermal recovery working condition requirements.
7. The offshore thermal recovery external cable electric submersible pump injection-production integrated pipe column according to claim 1, wherein the thermal recovery packer (7), the air release valve (8) and the deep well safety valve (10) are resistant to temperature of 350 ℃ and pressure of 21 MPa.
8. An operation method based on the integrated pipe column of any one of the claims 1 to 7, characterized by comprising the following steps:
when the heavy oil well needs to inject steam
The ground control system closes the deep well safety valve (10) and the air release valve (8), after an electric submersible pump system in the first aerogel heat insulation oil pipe (14) is started, the ground control system pressurizes and opens the deep well safety valve (10) and the air release valve (8), high-temperature steam (25) enters the stratum after passing through a thermal recovery well head, the first aerogel heat insulation oil pipe (14), the deep well safety valve (10), a thermal recovery packer (7), the second aerogel heat insulation oil pipe (6), a Y joint (5), a common oil pipe (2) and the injection allocation valve (4), and high-purity nitrogen (26) enters the stratum after passing through the thermal recovery well head, an oil sleeve annulus and the air release valve (8), so that the injection working condition of the high-temperature steam (25) is realized;
(II) when the steam injection is finished and the soaking is finished, the open flow operation of the heavy oil well is required to be carried out
After confirming the ground open flow process, firstly carrying out oil pressure relief, and enabling open flow well liquid (27) to enter a ground open flow pipeline through an injection valve (4), a common oil pipe (2), a Y joint (5), a second aerogel heat insulation oil pipe (6), a thermal recovery packer (7), a deep well safety valve (10), a first aerogel heat insulation oil pipe (14) and a thermal recovery wellhead; when the oil pressure is released, sleeve pressure is released, and sleeve gas (28) enters a ground blowout flow after passing through a gas release valve (8), an oil sleeve annulus and a thermal production wellhead to realize the blowout working condition of high-temperature well fluid;
(III) when the open flow finishes the heavy oil well and needs to produce
The method comprises the steps of putting an electric submersible pump system in a first aerogel heat insulation oil pipe (14) to a designed well depth, starting the electric submersible pump system to produce through a ground electric pump control cabinet, and enabling formation fluid (29) to enter a formation production flow after passing through a distribution injection valve (4), a common oil pipe (2), a Y joint (5), a second aerogel heat insulation oil pipe (6), a thermal recovery packer (7), a deep well safety valve (10), a pump (21), a continuous oil pipe (23) and a thermal recovery well mouth, so that the production working condition of the electric submersible pump after steam injection is realized.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110876173.XA CN113622832A (en) | 2021-07-30 | 2021-07-30 | Offshore thermal recovery external cable electric submersible pump injection-production integrated pipe column and operation method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110876173.XA CN113622832A (en) | 2021-07-30 | 2021-07-30 | Offshore thermal recovery external cable electric submersible pump injection-production integrated pipe column and operation method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113622832A true CN113622832A (en) | 2021-11-09 |
Family
ID=78381954
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110876173.XA Pending CN113622832A (en) | 2021-07-30 | 2021-07-30 | Offshore thermal recovery external cable electric submersible pump injection-production integrated pipe column and operation method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113622832A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114876423A (en) * | 2022-06-02 | 2022-08-09 | 中国海洋石油集团有限公司 | Electric submersible pump injection-production integrated pipe column structure and oil production method |
-
2021
- 2021-07-30 CN CN202110876173.XA patent/CN113622832A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114876423A (en) * | 2022-06-02 | 2022-08-09 | 中国海洋石油集团有限公司 | Electric submersible pump injection-production integrated pipe column structure and oil production method |
| CN114876423B (en) * | 2022-06-02 | 2024-02-27 | 中国海洋石油集团有限公司 | Electric submersible pump injection and production integrated tubular column structure and oil production method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102587981B (en) | Underground salt cavern gas storage and building method thereof | |
| CN101539011B (en) | Fire flood eclectic ignition device | |
| CN112012706A (en) | Offshore thickened oil steam huff-puff injection-production integrated device | |
| CN110541418A (en) | Self-locking nested deepwater drilling surface conduit and installation method thereof | |
| CN113622831A (en) | Offshore thermal recovery electric submersible pump injection-production integrated pipe column and operation method | |
| CN102071915B (en) | Annular space continuous nitrogen injection auxiliary heat insulation method for offshore thermal recovery | |
| CN106499376A (en) | A kind of air injection auxiliary super-viscous oil underground cracking modifying process based on pit shaft heating mode | |
| CN110043235A (en) | A kind of thick oil filling vaporization method burnt using underground supercritical water | |
| CN201874543U (en) | Underground boosting water injection process pipe string | |
| CN210033395U (en) | Single horizontal well gravity oil drainage exploitation device using underground steam generation | |
| CN113622832A (en) | Offshore thermal recovery external cable electric submersible pump injection-production integrated pipe column and operation method | |
| CN205605156U (en) | Workover device is pressed in oil gas field area | |
| CN215672164U (en) | Jet pump lifting process pipe column capable of being repeatedly acidified in offshore oil field | |
| CN113586022B (en) | Method and device for improving yield of natural gas hydrate reservoir through freezing fracturing | |
| CN111911117B (en) | Combustible ice exploitation pipe column heated by stratum energy and operation method thereof | |
| CN216157603U (en) | Offshore thermal recovery external cable electric submersible pump injection-production integrated tubular column | |
| CN211312521U (en) | Self-locking nested deep water drilling surface conduit | |
| CN109441400B (en) | Device and method for removing and preventing wax of gas lift oil production well | |
| RU2395677C1 (en) | Thermal stimulator for heavy and bituminous oil reservoir | |
| CN216341944U (en) | Injection-production integrated tubular column of offshore thermal production electric submersible pump | |
| JP2024088564A (en) | Natural gas hydrate-shallow gas-deep gas multi-source multi-method joint mining system and method | |
| WO2021160083A1 (en) | Downhole preheating starting method for super heavy oil reservoir developed by means of dual-horizontal-well sagd | |
| CN114934762A (en) | Heavy oil reservoir oil production method and oil production system thereof | |
| CN204571946U (en) | A kind of casing programme for natural petroleum gas field | |
| CN204627573U (en) | Tubular column equipment of two horizontal wells of SAGD |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |