CN111364952A - Horizontal well injection and production system - Google Patents
Horizontal well injection and production system Download PDFInfo
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- CN111364952A CN111364952A CN201811595386.XA CN201811595386A CN111364952A CN 111364952 A CN111364952 A CN 111364952A CN 201811595386 A CN201811595386 A CN 201811595386A CN 111364952 A CN111364952 A CN 111364952A
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- 238000002347 injection Methods 0.000 title claims abstract description 79
- 239000007924 injection Substances 0.000 title claims abstract description 79
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 44
- 239000003129 oil well Substances 0.000 claims description 5
- 239000010720 hydraulic oil Substances 0.000 claims description 4
- 230000000149 penetrating effect Effects 0.000 claims description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 14
- 239000003921 oil Substances 0.000 description 24
- 239000000295 fuel oil Substances 0.000 description 5
- 238000010796 Steam-assisted gravity drainage Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 238000000605 extraction Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 230000009471 action Effects 0.000 description 3
- 238000011161 development Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000012544 monitoring process Methods 0.000 description 3
- 230000003287 optical effect Effects 0.000 description 3
- 238000010793 Steam injection (oil industry) Methods 0.000 description 2
- 239000010779 crude oil Substances 0.000 description 2
- 230000007257 malfunction Effects 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000000704 physical effect Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 230000008859 change Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000014509 gene expression Effects 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
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- 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
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- 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
- E21B34/00—Valve arrangements for boreholes or wells
- E21B34/06—Valve arrangements for boreholes or wells in wells
- E21B34/14—Valve arrangements for boreholes or wells in wells operated by movement of tools, e.g. sleeve valves operated by pistons or wire line tools
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- 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
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- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Earth Drilling (AREA)
Abstract
The invention provides a horizontal well injection and production system, which comprises: the first injection pipe penetrates through the first horizontal well and comprises a plurality of pipe sections which are connected in sequence; the sliding sleeve, the both ends of sliding sleeve are connected with two adjacent pipeline sections of first injection pipe respectively, and the sliding sleeve has the cover chamber with the pipeline section intercommunication, and the sliding sleeve has the open mode with the outside intercommunication of cover chamber and sliding sleeve and the closed mode with the outside disconnection of cover chamber and sliding sleeve, and the sliding sleeve is a plurality of, and a plurality of sliding sleeves set up along the extending direction interval of first injection pipe. Through the technical scheme provided by the invention, the problem that the position of injecting water or steam into an oil reservoir is difficult to control in the prior art can be solved.
Description
Technical Field
The invention relates to the technical field of oil exploitation, in particular to a horizontal well injection and production system.
Background
In oil recovery, it is often necessary to inject water or high temperature steam into a horizontal well of the reservoir to induce oil production. The existing scheme is not easy to control the position of injecting water or steam into the horizontal well, and influences the petroleum production.
Disclosure of Invention
The invention provides a horizontal well injection and production system, which aims to solve the problem that the position of water or steam injected into an oil reservoir is difficult to control in the prior art.
In order to solve the above problems, the present invention provides a horizontal well injection-production system, comprising: the first injection pipe penetrates through the first horizontal well and comprises a plurality of pipe sections which are connected in sequence; the sliding sleeve, the both ends of sliding sleeve are connected with two adjacent pipeline sections of first injection pipe respectively, and the sliding sleeve has the cover chamber with the pipeline section intercommunication, and the sliding sleeve has the open mode with the outside intercommunication of cover chamber and sliding sleeve and the closed mode with the outside disconnection of cover chamber and sliding sleeve, and the sliding sleeve is a plurality of, and a plurality of sliding sleeves set up along the extending direction interval of first injection pipe.
Further, the horizontal well injection-production system further comprises: and the temperature measuring device penetrates through the second horizontal well, extends in the same direction as the first injection pipe and is provided with a plurality of temperature measuring points at intervals along the length direction.
Further, the horizontal well injection-production system further comprises: and the control device is electrically connected with the temperature measuring device, can receive the temperature measuring result of the temperature measuring device corresponding to the sliding sleeve and switches the state of the sliding sleeve according to the temperature measuring result.
Further, the horizontal well injection-production system further comprises: the second injection pipe penetrates through the first horizontal well and can inject and recover steam; the first pipeline penetrates through the second horizontal well; the sucker rod and the oil well pump are both arranged in the first pipeline; and the second pipeline penetrates through the second horizontal well, and the temperature measuring device penetrates through the second pipeline.
Further, the horizontal well injection-production system further comprises: the switch tool can penetrate into the first injection pipe and any sliding sleeve, and the switch tool is used for switching any sliding sleeve into an open state or a closed state.
Further, the sliding sleeve includes: the two ends of the outer sleeve are respectively connected with the two adjacent pipe sections, and the side wall of the outer sleeve is provided with a first through hole; the inner sleeve is movably arranged in the outer sleeve, a second through hole is formed in the side wall of the inner sleeve, the second through hole can be communicated with or disconnected from the first through hole due to the movement of the inner sleeve, the sliding sleeve is in an open state when the second through hole is communicated with the first through hole, and the sliding sleeve is in a closed state when the second through hole is disconnected from the first through hole; the switch tool can be matched with the inner sleeve to drive the inner sleeve to move.
Further, the both ends of endotheca have first joint structure and second joint structure respectively, and the switch instrument can with any joint in first joint structure and the second joint structure to it slides in the overcoat to drive the endotheca.
Further, the switching means comprises: a center pole; the switch handle is arranged on the central rod and can move along the radial direction of the central rod, and the switch handle is provided with an extending position clamped with the inner sleeve and a retracting position avoiding the inner sleeve.
Further, the switch handle has a first inclined surface, and the switch tool further includes: the stop collar is movably sleeved on the central rod, the stop collar is provided with a second inclined surface, the second inclined surface is matched with the first inclined surface, the switch handle extends out along the radial direction of the central rod when the stop collar moves towards the direction far away from the switch handle, and the switch handle retracts along the radial direction of the central rod when the stop collar moves towards the direction close to the switch handle.
Furthermore, the switch handle is provided with a bulge used for being clamped with the sliding sleeve, and an included angle between the first inclined surface and the axis of the central rod ranges from 70 degrees to 80 degrees.
Furthermore, the center rod comprises a rod body and a ring body which is convexly arranged on the rod body, the limiting sleeve comprises a first sleeve body and a second sleeve body which are mutually connected, the second inclined plane is positioned on the second sleeve body, the first sleeve body is sleeved on the rod body, the second sleeve body is sleeved on the second sleeve body, a cavity is arranged between the first sleeve body and the ring body, a channel is arranged in the rod body, the channel is communicated with the cavity, and hydraulic oil can be injected into the cavity to drive the limiting sleeve to move.
Furthermore, the limiting sleeve also comprises a third sleeve body, the third sleeve body is positioned on one side of the first sleeve body, which is far away from the second sleeve body, a first elastic part is arranged in a cavity between the third sleeve body and the rod body, and the first elastic part is abutted against the first sleeve body; and a second elastic piece is arranged in the cavity between the switch handle and the rod body, and two ends of the second elastic piece are respectively abutted against the switch handle and the rod body.
Further, the stop collar is two, and the switch handle is located between two stop collars, and the switch instrument still includes: the first joint is connected with one end of the central rod; and/or a second joint connected with the other end of the central rod.
By applying the technical scheme of the invention, the first injection pipe and the plurality of sliding sleeves are arranged in the horizontal well injection and production system, wherein two ends of each sliding sleeve are respectively connected with two adjacent pipe sections of the first injection pipe, and the sliding sleeves have an open state communicated with the outside and a closed state disconnected with the outside, so that the connection and disconnection between different positions of the first injection pipe and the outside can be realized by adjusting the states of the sliding sleeves at different positions, so that water or steam can be injected into an oil reservoir from different positions of the first injection pipe, and the control is convenient. Therefore, by the technical scheme, the position of injecting water or steam into the oil reservoir can be flexibly controlled, so that the oil reservoir yield is improved.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the invention and, together with the description, serve to explain the invention and not to limit the invention. In the drawings:
fig. 1 shows a schematic structural diagram of a horizontal well injection-production system according to a first embodiment of the present invention;
fig. 2 shows a schematic structural diagram of a horizontal well injection-production system provided by a second embodiment of the invention;
FIG. 3 is a schematic structural view of the sliding sleeve in FIG. 2 in an open state;
FIG. 4 is a schematic structural view of the sliding sleeve in FIG. 2 in a closed state;
FIG. 5 shows a schematic of the construction of the switch tool in the horizontal well injection and production system (with the switch handle retracted);
FIG. 6 shows another schematic of the switch tool in the horizontal well injection and production system (with the switch handle extended);
FIG. 7 shows a schematic illustrating a switch tool closing a sliding sleeve in a horizontal well injection and production system;
fig. 8 shows a schematic diagram illustrating the opening and closing tool in a horizontal well injection and production system opening the sliding sleeve.
Wherein the figures include the following reference numerals:
11. a first injection pipe; 12. a second injection pipe; 20. a sliding sleeve; 21. a jacket; 211. a first through hole; 212. an upper joint; 213. a lower joint; 214. a middle sleeve; 215. a seal ring; 22. an inner sleeve; 221. a second through hole; 222. a first clamping structure; 223. a second clamping structure; 30. a temperature measuring device; 41. a first pipeline; 42. a sucker rod; 43. an oil well pump; 44. a second pipeline; 50. a switch tool; 51. a center pole; 511. a rod body; 512. a ring body; 52. a switch handle; 521. a first inclined plane; 522. a protrusion; 53. a limiting sleeve; 531. a second inclined plane; 532. a first sleeve body; 533. a second sleeve body; 534. a third sleeve body; 54. a first elastic member; 55. a second elastic member; 56. a first joint; 57. a second joint.
Detailed Description
The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
As shown in fig. 1, a first embodiment of the present invention provides a horizontal well injection-production system, including: the first injection pipe 11 penetrates through the first horizontal well, and the first injection pipe 11 comprises a plurality of pipe sections which are connected in sequence; the sliding sleeve 20, the two ends of the sliding sleeve 20 are respectively connected with two adjacent pipe sections of the first injection pipe 11, the sliding sleeve 20 has a sleeve cavity communicated with the pipe sections, the sliding sleeve 20 has an open state communicating the sleeve cavity with the outside of the sliding sleeve 20 and a closed state disconnecting the sleeve cavity with the outside of the sliding sleeve 20, the sliding sleeve 20 is multiple, and the sliding sleeves 20 are arranged at intervals along the extending direction of the first injection pipe 11.
By applying the technical scheme of the embodiment, the first injection pipe 11 and the plurality of sliding sleeves 20 are arranged in the horizontal well injection and production system, wherein two ends of the sliding sleeves 20 are respectively connected with two adjacent pipe sections of the first injection pipe 11, and the sliding sleeves 20 have an open state communicated with the outside and a closed state disconnected with the outside, so that the different positions of the first injection pipe 11 can be switched on and off with the outside by adjusting the states of the sliding sleeves 20 at different positions, so that water or steam can be injected into the oil reservoir from different positions of the first injection pipe 11, and the control is facilitated. Therefore, by the technical scheme, the position of injecting water or steam into the oil reservoir can be flexibly controlled, so that the oil reservoir yield is improved.
For example, for a tight reservoir, a first horizontal well is used for water injection development, and because the reservoir is tight and effective displacement between wells cannot be realized, a well throughput mode is required for production, and throughput production requires three processes: a water injection stage, a well-closing stage and an oil production stage. And in the water injection stage, water is injected into the well through the first injection pipe 11 and a certain sliding sleeve 20, the sliding sleeve 20 is closed to blank the well after a certain period of injection, oil-water replacement is realized in the well, and the well is opened to recover oil after the replacement is finished. In order to realize the uniform extraction of the horizontal section of the first horizontal well, a sectional injection and sectional extraction process is required, namely, the horizontal well injection and extraction system can realize the selection of any sliding sleeve 20 to open water injection and close a closed well, and the selection of any sliding sleeve 20 to open oil extraction.
The Steam Assisted Gravity Drainage (SAGD) technology is a leading-edge technology for developing super heavy oil, the technology is wide in applicable oil reservoir range, and due to the characteristics of strong heterogeneity, high viscosity, poor physical properties and the like of the super heavy oil reservoir, the SAGD well horizontal well section is low in exploitation degree and single well yield, and the development effect and the whole exploitation of the heavy oil reservoir are directly influenced.
The SAGD development technology mainly comprises two horizontal wells, wherein the first horizontal well is used for steam injection, the second horizontal well is used for oil production, steam is injected into the first horizontal well to heat and reduce viscosity of stratum super-heavy oil, the crude oil flows into the second horizontal well under the action of gravity, and the crude oil is produced by the second horizontal well.
Because the horizontal segment is long, the induced influence of oil deposit heterogeneity, rerum natura difference and oil recovery pump suction position usually leads to horizontal segment front end steam scurring, and the first horizontal well steam injection is not whole heat transfer, directly is produced by the second horizontal well front end, leads to other positions to use the inhomogeneous scheduling problem of degree.
As shown in fig. 2 to 8, a second embodiment of the present invention provides another horizontal well injection-production system, including: the first injection pipe 11 penetrates through the first horizontal well, the first injection pipe 11 comprises a plurality of pipe sections which are connected in sequence, and the first injection pipe 11 is used for injecting steam; the two ends of the sliding sleeve 20 are respectively connected with two adjacent pipe sections of the first injection pipe 11, the sliding sleeve 20 is provided with a sleeve cavity communicated with the pipe sections, the sliding sleeve 20 is provided with an open state for communicating the sleeve cavity with the outside of the sliding sleeve 20 and a closed state for disconnecting the sleeve cavity with the outside of the sliding sleeve 20, the sliding sleeves 20 are multiple, and the sliding sleeves 20 are arranged at intervals along the extending direction of the first injection pipe 11; and the temperature measuring device 30 penetrates through the second horizontal well, the temperature measuring device 30 and the first injection pipe 11 extend in the same direction, and a plurality of temperature measuring points are arranged at intervals along the length direction of the temperature measuring device 30. The temperature measuring device 30 may be configured as a temperature measuring cable.
By applying the technical scheme of the invention, the first injection pipe 11, the sliding sleeve 20 and the temperature measuring device 30 are arranged in the horizontal well injection and production system, wherein two ends of the sliding sleeve 20 are respectively connected with two adjacent pipe sections of the first injection pipe 11, and the sliding sleeve 20 has an open state communicated with the outside and a closed state disconnected with the outside, so that the on-off of different positions of the first injection pipe 11 and the outside can be realized by adjusting the states of the sliding sleeve 20 at different positions, and the steam can be discharged or suppressed from the different positions of the first injection pipe 11 to an oil reservoir. Moreover, the temperature measuring device 30 can measure the temperature of the positions corresponding to different sliding sleeves 20, and then can judge whether the heat exchange of the steam in the first injection pipe 11 is sufficient at different positions, so as to adjust the states of the sliding sleeves 20 at different positions and discharge the steam after the sufficient heat exchange is realized. Therefore, by adopting the technical scheme, the heat utilization rate of the steam injected into the oil reservoir can be improved, so that the oil reservoir yield is improved.
In this embodiment, the horizontal well injection-production system further includes: and the control device is electrically connected with the temperature measuring device 30, can receive the temperature measuring result of the temperature measuring device 30 corresponding to the sliding sleeve 20, and switches the state of the sliding sleeve 20 according to the temperature measuring result. The state of the sliding sleeve 20 is referred to as an open state or a closed state. For example, when the temperature measuring device 30 detects that the temperature of a position corresponding to a certain sliding sleeve 20 exceeds a set value, it indicates that steam is discharged at the position of the sliding sleeve 20 due to insufficient heat exchange, and at this time, the control device can switch the sliding sleeve 20 to a closed state to hold the steam. When the temperature of the position corresponding to a certain sliding sleeve 20 is detected to be lower than a set value, the steam heat exchange is considered to be sufficient, and the control device can enable the sliding sleeve 20 to be switched to an open state. Thus, the heat utilization rate of the steam injected into the reservoir can be improved.
In this embodiment, the horizontal well injection-production system further includes: the second injection pipe 12 penetrates through the first horizontal well, and the second injection pipe 12 can inject and recover steam; a first pipe 41 passing through the second horizontal well; the sucker rod 42 and the oil well pump 43 communicated with the sucker rod 42 are both arranged in the first pipeline 41; and a second pipeline 44 is arranged in the second horizontal well in a penetrating way, and the temperature measuring device 30 is arranged in the second pipeline 44 in a penetrating way. Through the arrangement, steam can be conveniently injected into the oil reservoir and heavy oil can be conveniently exploited.
In this embodiment, the horizontal well injection-production system further includes: and an opening and closing tool 50, wherein the opening and closing tool 50 can penetrate into the first injection pipe 11 and any one of the sliding sleeves 20, and the opening and closing tool 50 is used for switching any one of the sliding sleeves 20 to be in an opening state or a closing state. The change of the state of the sliding sleeve 20 is facilitated by the switch tool 50.
As shown in fig. 3 and 4, the sliding sleeve 20 includes: the two ends of the outer sleeve 21 are respectively connected with the two adjacent pipe sections, and the side wall of the outer sleeve 21 is provided with a first through hole 211; the inner sleeve 22 is movably arranged in the outer sleeve 21, a second through hole 221 is formed in the side wall of the inner sleeve 22, the second through hole 221 can be communicated with or disconnected from the first through hole 211 through the movement of the inner sleeve 22, the sliding sleeve 20 is in an open state when the second through hole 221 is communicated with the first through hole 211, and the sliding sleeve 20 is in a closed state when the second through hole 221 is disconnected from the first through hole 211; the switch tool 50 can be engaged with the inner sleeve 22 to move the inner sleeve 22. This allows the sliding sleeve 20 to be switched to either the open or closed state by movement of the inner sleeve 22.
Specifically, the outer sleeve 21 includes an upper joint 212, a lower joint 213, an intermediate sleeve 214, and a sealing ring 215, wherein the upper joint 212 and the lower joint 213 are used to connect with the pipe section of the first filling pipe 11, the first through hole 211 is provided on the intermediate sleeve 214, and the intermediate sleeve 214 is sealingly connected with the upper joint 212 and the lower joint 213 by the sealing ring 215. The seal ring 215 may be provided as a V-shaped seal ring. In this embodiment, the upper joint 212 and the lower joint 213 respectively have a limiting structure for limiting the two moving directions of the inner sleeve 22.
In this embodiment, the inner sleeve 22 has a first engaging structure 222 and a second engaging structure 223 at two ends thereof, and the switch tool 50 can engage with any one of the first engaging structure 222 and the second engaging structure 223 to drive the inner sleeve 22 to slide in the outer sleeve 21. The switch tool 50 can be conveniently connected with or separated from different positions of the inner sleeve 22 in a clamping manner, and the operation is convenient.
As shown in fig. 5 to 8, the switch tool 50 includes: a center rod 51; and a switch handle 52 arranged on the central rod 51, wherein the switch handle 52 can move along the radial direction of the central rod 51, and the switch handle 52 has an extending position for being clamped with the inner sleeve 22 and a retracting position for avoiding the inner sleeve 22. Thus, the inner sleeve 22 can be engaged or disengaged by moving the switch handle 52 in the radial direction of the center rod 51. Through the above arrangement, one switch tool 50 can be used to control the opening or closing of the plurality of sliding sleeves 20 respectively. When the switch handle 52 is in the retracted position, the switch tool 50 can be threaded through the sliding sleeve 20 to move into another sliding sleeve 20. In the present embodiment, the switch lever 52 may be provided in plurality, and the plurality of switch levers 52 may be provided along the circumferential direction of the center rod 51.
Specifically, the switch handle 52 has a first slope 521, and the switch tool 50 further includes: the limiting sleeve 53 is movably sleeved on the central rod 51, the limiting sleeve 53 is provided with a second inclined surface 531, the second inclined surface 531 is matched with the first inclined surface 521, the switch handle 52 extends out along the radial direction of the central rod 51 when the limiting sleeve 53 moves towards the direction far away from the switch handle 52, and the switch handle 52 retracts along the radial direction of the central rod 51 when the limiting sleeve 53 moves towards the direction close to the switch handle 52. Thus, the switch handle 52 can be extended or retracted along the radial direction of the central rod 51 by the cooperation of the first inclined surface 521 and the second inclined surface 531.
In this embodiment, the switch handle 52 has a protrusion 522 for engaging with the sliding sleeve 20, and the angle between the first inclined surface 521 and the axis of the central rod 51 is 70 to 80 degrees. The projections 522 facilitate engagement with the sleeve 20. By setting the angle between the first inclined surface 521 and the axis of the center rod 51 to the above-mentioned angle, smooth movement of the switch lever 52 can be ensured. For example, the angle between the first inclined surface 521 and the axis of the center rod 51 may be set to 75 degrees.
As shown in fig. 5, the center rod 51 includes a rod body 511 and a ring body 512 protruding from the rod body 511, the position-limiting sleeve 53 includes a first sleeve 532 and a second sleeve 533 connected to each other, the second inclined surface 531 is located on the second sleeve 533, the first sleeve 532 is sleeved on the rod body 511, the second sleeve 533 is sleeved on the second sleeve 533, a cavity is formed between the first sleeve 532 and the ring body 512, a channel is formed in the rod body 511, the channel is communicated with the cavity, and hydraulic oil can be injected into the cavity to drive the position-limiting sleeve 53 to move. This allows the movement of the stop collar 53 to be controlled by means of hydraulic actuation. This way, accurate driving over long distances can be achieved.
Further, the position limiting sleeve 53 further comprises a third sleeve body 534, the third sleeve body 534 is located on one side of the first sleeve body 532, which is far away from the second sleeve body 533, a first elastic part 54 is arranged in a cavity between the third sleeve body 534 and the rod body 511, and the first elastic part 54 is abutted to the first sleeve body 532; a second elastic member 55 is disposed in the cavity between the switch handle 52 and the rod 511, and two ends of the second elastic member 55 are respectively abutted against the switch handle 52 and the rod 511. When the stop collar 53 moves away from the switch handle 52, the second elastic member 55 can push the switch handle 52 to extend. The switch lever 52 is held in the retracted position in the non-use state, and when the switch lever 52 needs to be coupled with the inner race 22, hydraulic driving is required to overcome the elastic force of the first elastic member 54.
In this embodiment, there are two position-limiting sleeves 53, the switch handle 52 is located between the two position-limiting sleeves 53, and the switch tool 50 further includes: a first joint 56 connected to one end of the center rod 51; and/or a second joint 57 connected to the other end of the central rod 51. The first connector 56 is adapted to connect to a pipeline connected to the surface to remotely operate the switch tool 50 at the surface. The second connector 57 may be used to connect with other components to add functionality to the switch tool 50. The second connector 57 is provided with a check valve so that hydraulic oil can be supplied from the second connector 57 to remove a malfunction when a malfunction occurs.
In order to facilitate understanding of the scheme, the working process of the horizontal well injection and production system is exemplarily described below.
The position of the second injection pipe is unchanged, the bottom end of the first horizontal well long pipe is sealed, oil reservoir numerical simulation is completed according to oil reservoir physical properties, a plurality of sliding sleeves (or horizontal sections are uniformly arranged, 1 sliding sleeve is arranged every 50 meters, and all the sliding sleeves are in an open state) are connected on the first horizontal well long pipe in a planned mode, a continuous temperature measuring optical cable is put into the second pipeline, continuous monitoring of every 1m monitoring point of the whole well section is achieved, the horizontal section temperature monitoring precision is fine, and regulation and control are more accurate.
The second horizontal well monitors the temperature distribution condition of the horizontal section in real time through a temperature measuring optical cable, and when the temperature of the front end position of the horizontal section of the second horizontal well rises to a temperature threshold value (the first horizontal well and the second horizontal well are communicated and steam does not exchange heat), if the position corresponding to the first horizontal well is a No. 1 sliding sleeve. The ground adopts a coiled tubing truck, the bottom of the coiled tubing truck is connected with a switch tool, and the switch tool is put in by adopting a pressurized operation mode (namely the first horizontal well does not stop steam or stops steam temporarily). After the switch tool enters the sliding sleeve, the pressure is applied to the interior of the coiled tubing, the switch handle is popped out, the coiled tubing is lifted up on the ground, the switch tool moves upwards under the action of the coiled tubing, the obvious tension of the coiled tubing on the ground when the switch tool passes through the bottom end of the sliding sleeve shows that the switch tool enters the inner sleeve, the coiled tubing is continuously and slowly lifted up, the switch handle is matched with the first clamping structure of the inner sleeve at the moment, the ground tension of the coiled tubing is obviously increased, the switch handle is shown to be completely matched with the first clamping structure of the inner sleeve, the coiled tubing is continuously lifted up to drive the inner sleeve to move upwards.
If No. 4 sliding sleeves are in a closed state in the earlier stage, the temperature of the temperature measuring optical cable at the bottommost end of the second horizontal well is obviously lower after 6 months, and thick oil between the second horizontal well and the first horizontal well is not effectively heated for use (corresponding to the position of No. 4 sliding sleeves), the No. 4 sliding sleeves need to be opened so as to improve the steam passing amount of the No. 4 sliding sleeves. The ground adopts a coiled tubing truck, a switch tool is connected to the bottom of the coiled tubing truck, the switch tool is put into the coiled tubing truck in a pressurized operation mode (namely, the first horizontal well does not stop steam or stops steam temporarily), the switch tool is put down to the front end position of a No. 4 sliding sleeve, the pressure is applied in the coiled tubing truck, a switch handle is popped up, the coiled tubing truck is put down on the ground, the switch tool moves down under the action of the coiled tubing truck, the obvious tension of the coiled tubing truck is displayed when the switch tool passes through the upper end of the sliding sleeve, the switch tool enters an inner sleeve and is continuously and slowly put down the coiled tubing truck, the switch handle passes through the inner sleeve to be matched with a second clamping structure at the moment, the ground tension of the coiled tubing truck is obviously increased, the switch handle is completely matched with the second clamping structure of the inner.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.
The relative arrangement of the components and steps, the numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless specifically stated otherwise. Meanwhile, it should be understood that the sizes of the respective portions shown in the drawings are not drawn in an actual proportional relationship for the convenience of description. Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate. In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.
In the description of the present invention, it is to be understood that the orientation or positional relationship indicated by the orientation words such as "front, rear, upper, lower, left, right", "lateral, vertical, horizontal" and "top, bottom", etc. are usually based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplicity of description, and in the case of not making a reverse description, these orientation words do not indicate and imply that the device or element being referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore, should not be considered as limiting the scope of the present invention; the terms "inner and outer" refer to the inner and outer relative to the profile of the respective component itself.
Spatially relative terms, such as "above … …," "above … …," "above … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial relationship to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if a device in the figures is turned over, devices described as "above" or "on" other devices or configurations would then be oriented "below" or "under" the other devices or configurations. Thus, the exemplary term "above … …" can include both an orientation of "above … …" and "below … …". The device may be otherwise variously oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.
It should be noted that the terms "first", "second", and the like are used to define the components, and are only used for convenience of distinguishing the corresponding components, and the terms have no special meanings unless otherwise stated, and therefore, the scope of the present invention should not be construed as being limited.
Claims (13)
1. A horizontal well injection and production system is characterized by comprising:
the first injection pipe (11) penetrates through the first horizontal well, and the first injection pipe (11) comprises a plurality of pipe sections which are connected in sequence;
the two ends of the sliding sleeve (20) are respectively connected with the adjacent two pipe sections of the first injection pipe (11), the sliding sleeve (20) is provided with a sleeve cavity communicated with the pipe sections, the sliding sleeve (20) is provided with an opening state communicated with the outside of the sliding sleeve (20) and a closing state disconnected with the outside of the sliding sleeve (20), the sliding sleeve (20) is multiple, and the sliding sleeve (20) is arranged at intervals along the extending direction of the first injection pipe (11).
2. The horizontal well injection and production system of claim 1, further comprising:
the temperature measuring device (30) penetrates through the second horizontal well, the temperature measuring device (30) and the first injection pipe (11) extend in the same direction, and a plurality of temperature measuring points are arranged at intervals along the length direction of the temperature measuring device (30).
3. The horizontal well injection and production system of claim 2, further comprising:
and the control device is electrically connected with the temperature measuring device (30), can receive the temperature measuring result of the temperature measuring device (30) corresponding to the sliding sleeve (20), and switches the state of the sliding sleeve (20) through the temperature measuring result.
4. The horizontal well injection and production system of claim 2, further comprising:
a second injection pipe (12) arranged in the first horizontal well in a penetrating mode, wherein the second injection pipe (12) can inject and recover steam;
a first conduit (41) passing in said second horizontal well;
the sucker rod (42) and the oil-well pump (43) communicated with the sucker rod (42), wherein the sucker rod (42) and the oil-well pump (43) are both arranged in the first pipeline (41);
a second pipeline (44) arranged in the second horizontal well, and the temperature measuring device (30) is arranged in the second pipeline (44) in a penetrating mode.
5. The horizontal well injection and production system according to any one of claims 1 to 4, further comprising:
a switch tool (50), wherein the switch tool (50) can penetrate into the first injection pipe (11) and any sliding sleeve (20), and the switch tool (50) is used for switching any sliding sleeve (20) into the opening state or the closing state.
6. The horizontal well injection and production system according to claim 5, wherein the sliding sleeve (20) comprises:
the two ends of the outer sleeve (21) are respectively connected with the two adjacent pipe sections, and the side wall of the outer sleeve (21) is provided with a first through hole (211);
the inner sleeve (22) is movably arranged in the outer sleeve (21), a second through hole (221) is formed in the side wall of the inner sleeve (22), the second through hole (221) can be communicated or disconnected with the first through hole (211) through the movement of the inner sleeve (22), the sliding sleeve (20) is in the open state when the second through hole (221) is communicated with the first through hole (211), and the sliding sleeve (20) is in the closed state when the second through hole (221) is disconnected with the first through hole (211);
the switch tool (50) can be matched with the inner sleeve (22) to drive the inner sleeve (22) to move.
7. The horizontal well injection and production system according to claim 6, wherein both ends of the inner sleeve (22) are respectively provided with a first clamping structure (222) and a second clamping structure (223), and the switch tool (50) can be clamped with any one of the first clamping structure (222) and the second clamping structure (223) to drive the inner sleeve (22) to slide in the outer sleeve (21).
8. The horizontal well injection and production system according to claim 6, wherein the switching means (50) comprises:
a center rod (51);
the switch handle (52) is arranged on the central rod (51), the switch handle (52) can be moved along the radial direction of the central rod (51), and the switch handle (52) is provided with an extending position clamped with the inner sleeve (22) and a retracting position avoiding the inner sleeve (22).
9. The horizontal well injection and production system according to claim 8, wherein the switch handle (52) has a first slope (521), the switch tool (50) further comprising:
the limiting sleeve (53) is movably sleeved on the central rod (51), the limiting sleeve (53) is provided with a second inclined surface (531), the second inclined surface (531) is matched with the first inclined surface (521), the switch handle (52) extends out along the radial direction of the central rod (51) when the limiting sleeve (53) moves towards the direction far away from the switch handle (52), and the switch handle (52) retracts along the radial direction of the central rod (51) when the limiting sleeve (53) moves towards the direction close to the switch handle (52).
10. The horizontal well injection and production system according to claim 9, wherein the switch handle (52) is provided with a protrusion (522) for clamping with the sliding sleeve (20), and the included angle between the first inclined surface (521) and the axis of the central rod (51) is 70-80 degrees.
11. The horizontal well injection-production system according to claim 9, wherein the central rod (51) comprises a rod body (511) and a ring body (512) which is arranged on the rod body (511) in a protruding manner, the stop collar (53) comprises a first sleeve body (532) and a second sleeve body (533) which are connected with each other, the second inclined surface (531) is located on the second sleeve body (533), the first sleeve body (532) is sleeved on the rod body (511), the second sleeve body (533) is sleeved on the second sleeve body (533), a cavity is formed between the first sleeve body (532) and the ring body (512), a channel is arranged in the rod body (511), the channel is communicated with the cavity, and hydraulic oil can be injected into the cavity to drive the stop collar (53) to move.
12. The horizontal well injection and production system of claim 11,
the limiting sleeve (53) further comprises a third sleeve body (534), the third sleeve body (534) is positioned on one side, away from the second sleeve body (533), of the first sleeve body (532), a first elastic part (54) is arranged in a cavity between the third sleeve body (534) and the rod body (511), and the first elastic part (54) is abutted to the first sleeve body (532);
and a second elastic piece (55) is arranged in a cavity between the switch handle (52) and the rod body (511), and two ends of the second elastic piece (55) are respectively abutted against the switch handle (52) and the rod body (511).
13. The horizontal well injection and production system according to claim 9, wherein there are two stop collars (53), the switch handle (52) is located between the two stop collars (53), and the switch tool (50) further comprises:
a first joint (56) connected to one end of the center rod (51); and/or the presence of a gas in the gas,
and a second joint (57) connected to the other end of the center rod (51).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811595386.XA CN111364952A (en) | 2018-12-25 | 2018-12-25 | Horizontal well injection and production system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811595386.XA CN111364952A (en) | 2018-12-25 | 2018-12-25 | Horizontal well injection and production system |
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| CN111364952A true CN111364952A (en) | 2020-07-03 |
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| CN201811595386.XA Pending CN111364952A (en) | 2018-12-25 | 2018-12-25 | Horizontal well injection and production system |
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| CN (1) | CN111364952A (en) |
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