CN204371284U - Exhaust shaft is utilized to adjust the well pattern structure of fireflood assisted gravity drainage live wire form - Google Patents
Exhaust shaft is utilized to adjust the well pattern structure of fireflood assisted gravity drainage live wire form Download PDFInfo
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- CN204371284U CN204371284U CN201420801255.3U CN201420801255U CN204371284U CN 204371284 U CN204371284 U CN 204371284U CN 201420801255 U CN201420801255 U CN 201420801255U CN 204371284 U CN204371284 U CN 204371284U
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- 230000005484 gravity Effects 0.000 title claims abstract description 52
- 238000004519 manufacturing process Methods 0.000 claims abstract description 58
- 238000002347 injection Methods 0.000 claims abstract description 54
- 239000007924 injection Substances 0.000 claims abstract description 54
- 238000002485 combustion reaction Methods 0.000 abstract description 16
- 238000011084 recovery Methods 0.000 abstract description 8
- 238000011065 in-situ storage Methods 0.000 abstract description 6
- 239000007789 gas Substances 0.000 description 41
- 238000000034 method Methods 0.000 description 16
- 239000003921 oil Substances 0.000 description 10
- 230000000694 effects Effects 0.000 description 9
- 238000003892 spreading Methods 0.000 description 7
- 238000010586 diagram Methods 0.000 description 5
- 238000006073 displacement reaction Methods 0.000 description 5
- 238000012360 testing method Methods 0.000 description 5
- 239000000295 fuel oil Substances 0.000 description 4
- 230000005465 channeling Effects 0.000 description 3
- 239000010779 crude oil Substances 0.000 description 3
- 238000013461 design Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000011161 development Methods 0.000 description 2
- 238000000605 extraction Methods 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 239000000523 sample Substances 0.000 description 2
- 238000004227 thermal cracking Methods 0.000 description 2
- 235000008708 Morus alba Nutrition 0.000 description 1
- 240000000249 Morus alba Species 0.000 description 1
- 238000010795 Steam Flooding Methods 0.000 description 1
- 238000010793 Steam injection (oil industry) Methods 0.000 description 1
- 239000008186 active pharmaceutical agent Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000000567 combustion gas Substances 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000002939 deleterious effect Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 239000003027 oil sand Substances 0.000 description 1
- 230000000644 propagated effect Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
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Abstract
The utility model provides a kind of well pattern structure utilizing exhaust shaft to adjust fireflood assisted gravity drainage live wire form, comprise horizontal production well, gas injection straight well and auxiliary exhaust well, gas injection straight well and horizontal production well are positioned at a plane, horizontal production well contains net horizontal section and Vertical Well section, along the direction of net horizontal section, the distance that between gas injection straight well and the end of horizontal production well, interval sets, auxiliary exhaust well is arranged on the one or both sides of net horizontal section.The well pattern structure utilizing exhaust shaft to adjust fireflood assisted gravity drainage live wire form of the present utility model, effectively can expand the scope of live wire expansion when fireflood assisted gravity drainage is exploited, and improves shape heavy crude reservoir combustion in situ recovery ratio.
Description
Technical field
The utility model relates to a kind of well pattern structure being applicable to heavy crude reservoir, particularly a kind of well pattern structure utilizing exhaust shaft to adjust fireflood assisted gravity drainage live wire form.
Background technology
Fireflood assisted gravity drainage is on the basis of conventional straight well fireflood technology, by introducing horizontal production well, gives full play to the fireflood production technique of a kind of advanced person of gravity drainage effect.During application fireflood assisted gravity drainage techniques, combustion front spreads to heel along horizontal well from end, and form rapidly one before combustion before edge can mobiloil band, high temperature in this mobiloil band not only can provide very effective hot displacement source for oil reservoir, and the thermal cracking also for being detained heavy oil creates optimum condition; In moving belt, moveable oil declines rapidly by Action of Gravity Field and partial combustion gas together flows into the perforated interval of horizontal production well.Owing to not needing to flow through in cold oil district, and achieve short distance displacement, avoid in most conventional combustion in situ (ISC) technique the shortcoming using vertical injection wells and horizontal production well to carry out growing distance displacement.
Fireflood assisted gravity drainage physical simulation experiment shows targetedly: in fireflood assisted gravity drainage process, and sufficient combustion, combustion front are propagated stable, and thermal upgrading can make the API value rising about 10 of crude oil.Restriction larger in steam flooding has most crude oil still can not flow in the process, and these residual oils can pass through thermal cracking (500 DEG C) in fireflood assisted gravity drainage process makes its extraction, and recovery ratio is greater than 75%.The more important thing is, fireflood assisted gravity drainage process there will not be " displacement delay " phenomenon, and crude oil can with the rapid extraction of combustion front.
With other combustion drive Technical comparing, in fireflood assisted gravity drainage techniques process, high-temperature region and combustion front are vertical plane.Due to gas onlap in conventional process of in-situ combustion, burning oil reservoir will depart from this vertical plane.And the forced flow of fireflood assisted gravity drainage and gravity assist mechanism ensure that will to control completely or weaken this impact.Improve that conventional fireflood is applied to that displacement distance that massive oil pool exists, has channeling, onlap are serious simultaneously, the problem that combustion front is difficult to control and leading edge poor stability, volumetric sweep efficiency are low etc., make fireflood assisted gravity drainage techniques can become heavy crude producing and the most effective, the optimal method of oil-sand, be with a wide range of applications in heavy oil development.
Fireflood assisted gravity drainage production technique, since employing research, has worldwide only carried out the fireflood assisted gravity drainage test that hereby pilot project (Whitesands Pilot Project) etc. is few in number of Canadian White mulberry.The domestic block carrying out the test of fireflood assisted gravity drainage has 2, and achieves some achievements for the research of fireflood assisted gravity drainage.Such as, application number be 201120284618.7 Chinese utility model patent application (applying date is on August 5th, 2011, authorize day be on May 9th, 2012) in disclose a kind of super-viscous oil horizontal well fireflood assisted gravity drainage three pipe thermal recovery well head device, this device is connected with gate valve in the bottom of coiled tubing suspension sealing device, connects four-way, four-way bottom gate valve and oil pipe gate valve in the lower end of gate valve.Connect three pipes six in the lower end of four-way bottom gate valve by crossover flange and lead to housing.Lead at three pipes six and housing is connected with a cover sluice valve and three pipes six lead to embedded gate valve, the upper end leading to housing at three pipes six is fixed with supervisor's hanger and looped pipeline hanger, and the center line of supervisor's hanger and looped pipeline hanger is on same straight line; Testing tube pipe hanger is fixed on three pipes six and leads to housing bottom.Effect is: can meet the needs of fireflood assisted gravity drainage technology to production, steam injection, test, no killing well workover treatment, ensures that super-viscous oil horizontal well is normally produced and good exploitation effect.
In addition, application number be 2013203003939.9 Chinese utility model patent application (applying date is on May 29th, 2013, authorize day be on January 15th, 2014) in disclose a kind of intelligent temperature control device for fireflood assisted gravity drainage, comprise the many groups thermal detector be arranged in fireflood producing well monitoring tubing string, and be arranged on the temperature probe on well head production flow line; The data acquisition equipment arranged, connects many group thermal detectors and temperature probe by multi-cable; Control appliance, its input interface and data acquisition equipment are electrically connected; Temperature control executing agency, be electrically connected at the output interface of control appliance, and comprise the injection pipeline being communicated in fireflood producing well injection string, the gas injection pipeline being communicated in gas injection tube column in fireflood gas injection well and stretch at least one of electric heater unit three of fireflood producing well flow string.Whole temperature data acquisition, computing, feedback procedure, without the need to artificially adjusting intervention, for full-automation is implemented, both saved manpower, turn avoid the production fluid temperature control because artificial adjustment causes not in time, thus a series of production problems caused.
As shown in Figure 3, it is prior art fireflood assisted gravity drainage well pattern structure schematic diagram, it comprises the horizontal production well 1 and gas injection straight well 2 that are positioned at a plane, horizontal production well 1 is containing net horizontal section 11 and Vertical Well section 12, along the direction of net horizontal section 11, the distance that between the end of gas injection straight well 2 and horizontal production well 1, interval sets.Because live wire has upwards onlap characteristic, and horizontal production well 1 is on the impact of live wire tractive, live wire plane is limited and easily break through horizontal production well 1 at the end extended of net horizontal section 11, and terminal level producing well 1 will be forced to stop production to avoid live wire to break through horizontal production well 1.As shown in Figure 4, it is the volume sweep conditions of prior art fireflood assisted gravity drainage well pattern structure, be easy to find out from figure, the spreading range of its live wire is less, and live wire expansion is advanced by leaps and bounds along the direction of net horizontal section 11, if live wire breaks through horizontal production well 1, then test failure can be caused.
Utility model content
Little and easily break through the problem of horizontal production well in order to overcome live wire spreading range in fireflood assisted gravity drainage mining type, the utility model provides a kind of well pattern structure utilizing exhaust shaft to adjust fireflood assisted gravity drainage live wire form, effectively can expand the scope of live wire expansion when fireflood assisted gravity drainage is exploited, improve shape heavy crude reservoir combustion in situ recovery ratio.
The utility model solves the technical scheme that its technical problem adopts: a kind of well pattern structure utilizing exhaust shaft to adjust fireflood assisted gravity drainage live wire form, comprise horizontal production well, gas injection straight well and auxiliary exhaust well, gas injection straight well and horizontal production well are positioned at a plane, horizontal production well contains net horizontal section and Vertical Well section, along the direction of net horizontal section, the distance that between gas injection straight well and the end of horizontal production well, interval sets, auxiliary exhaust well is arranged on the one or both sides of net horizontal section.
Auxiliary exhaust well comprises the front auxiliary exhaust straight well group and rear auxiliary exhaust straight well group that are separately positioned on net horizontal section both sides, front auxiliary exhaust straight well group contain multiple direction along net horizontal section arrange before auxiliary exhaust straight well, rear auxiliary exhaust straight well group contains the rear auxiliary exhaust straight well that multiple direction along net horizontal section is arranged.
Front auxiliary exhaust straight well group and rear auxiliary exhaust straight well group are about net horizontal section axial symmetry.
Before described in every a bite, the ratio of the capacity of auxiliary exhaust straight well and the capacity of horizontal production well is 1/2, after described in every a bite, the ratio of the capacity of auxiliary exhaust straight well and the capacity of horizontal production well is 1/2, before described in every a bite, the ratio of the exhaust velocity of auxiliary exhaust straight well and the gas injection speed of gas injection straight well is 1/4 to 1/3, and after described in every a bite, the ratio of the exhaust velocity of auxiliary exhaust straight well and the gas injection speed of gas injection straight well is 1/4 to 1/3.
In front auxiliary exhaust straight well group, from the end of net horizontal section to auxiliary exhaust straight well before described in the first in the heel direction of net horizontal section be auxiliary exhaust straight well before first; Along the direction of net horizontal section, the distance before first between auxiliary exhaust straight well and gas injection straight well is 20 meters; Along the direction perpendicular to net horizontal section, the distance before first between auxiliary exhaust straight well and net horizontal section is 20 meters.
In front auxiliary exhaust straight well group, the distance between adjacent two front auxiliary exhaust straight wells is 50 meters to 60 meters.
The distance of the described setting between gas injection straight well and the end of horizontal production well is 3 meters to 5 meters.
The degree of depth of gas injection straight well is 800 meters to 1500 meters, and the degree of depth of auxiliary exhaust well is 800 meters to 1500 meters.
The length of net horizontal section is 100 meters to 1000 meters, and the degree of depth of Vertical Well section is 800 meters to 1500 meters.
The beneficial effects of the utility model are, break the production model that horizontal production well is produced and is vented, by setting up some mouthfuls of auxiliary exhaust wells in the one or both sides of horizontal production well, form gas injection straight well, the note of horizontal production well and auxiliary exhaust well one adopts row's combined system, make full use of auxiliary exhaust well and effect is pulled to live wire, effective expansion live wire spreading range, improve fireflood sweep conditions, finally reach the object improving massive heavy oil reservoir combustion in situ recovery ratio, compared with the fireflood assisted gravity drainage well pattern structure that auxiliary exhaust well is not set in prior art, recovery ratio increase rate increase at least 10%.Meanwhile, the position of optimal design auxiliary exhaust well, thus live wire can be pulled in plane and longitudinal direction, avoid live wire to break through producing well, realize the optimum expansion of live wire; The capacity of horizontal production well reduces to when not establishing auxiliary exhaust well 2/3, reduces because being vented the risk causing too early has channeling, gas lock, live wire to break through too early in a large number.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, the utility model is described further.
Fig. 1 is the well pattern structure schematic diagram utilizing exhaust shaft to adjust fireflood assisted gravity drainage live wire form of the present utility model.
Fig. 2 is the volume sweep conditions schematic diagram using well pattern structure of the present utility model.
Fig. 3 is prior art fireflood assisted gravity drainage well pattern structure schematic diagram.
Fig. 4 is the volume sweep conditions schematic diagram of prior art fireflood assisted gravity drainage well pattern structure.
Description of reference numerals: 1. horizontal production well, 11. net horizontal sections, 12. peupendicular hole sections, 2. gas injection straight well, 3. auxiliary exhaust well, auxiliary exhaust straight well group before 31., auxiliary exhaust straight well group after 32., auxiliary exhaust straight well before 311. first, auxiliary exhaust straight well after 321. first, auxiliary exhaust straight well before 312. second, auxiliary exhaust straight well after 322. second, auxiliary exhaust straight well before 313. the 3rd, auxiliary exhaust straight well after 323. the 3rd.
Detailed description of the invention
In order to there be understanding clearly to technical characteristic of the present utility model, object and effect, now contrast accompanying drawing and detailed description of the invention of the present utility model is described.
As shown in Figure 1, the utility model provides a kind of well pattern structure utilizing exhaust shaft to adjust fireflood assisted gravity drainage live wire form, described well pattern structure comprises horizontal production well 1, gas injection straight well 2 and auxiliary exhaust well 3, gas injection straight well 2 and horizontal production well 1 are positioned at a plane, horizontal production well 1 is containing net horizontal section 11 and Vertical Well section 12, along the direction of net horizontal section 11, the distance that between the end of gas injection straight well 2 and horizontal production well 1, interval sets, auxiliary exhaust well 3 is arranged on the one or both sides of net horizontal section 11.
Compared with prior art as shown in Figure 3, the well pattern structure utilizing exhaust shaft to adjust fireflood assisted gravity drainage live wire form of the present utility model arranges auxiliary exhaust well 3 in the one or both sides of horizontal production well 1, the note that gas injection straight well 2, horizontal production well 1 and auxiliary exhaust well 3 constitute one adopts row's combined system, because auxiliary exhaust well 3 pairs of live wires have the effect of pulling, therefore, can effectively expand live wire spreading range, thus improve fireflood sweep conditions, finally reach the object improving massive heavy oil reservoir combustion in situ recovery ratio.
In the embodiment shown in fig. 1, auxiliary exhaust well 3 comprises the front auxiliary exhaust straight well group 31 and rear auxiliary exhaust straight well group 32 that are separately positioned on net horizontal section 11 both sides, auxiliary exhaust straight well before front auxiliary exhaust straight well group 31 is arranged containing multiple direction along net horizontal section 11, the rear auxiliary exhaust straight well that rear auxiliary exhaust straight well group 32 is arranged containing multiple direction along net horizontal section 11.
When well pattern is arranged, make front auxiliary exhaust straight well group 31 and rear auxiliary exhaust straight well group 32 about net horizontal section 11 axial symmetry.The position of optimal design auxiliary exhaust well 3, can pull live wire, thus avoid live wire to break through producing well, realize the optimum expansion of live wire in plane and longitudinal direction.
Wherein, before described in every a bite, the ratio of the capacity of auxiliary exhaust straight well and the capacity of horizontal production well 1 is 1/2, after described in every a bite, the ratio of the capacity of auxiliary exhaust straight well and the capacity of horizontal production well 1 is 1/2, before described in every a bite, the ratio of the exhaust velocity of auxiliary exhaust straight well and the gas injection speed of gas injection straight well 2 is 1/4 to 1/3, and after described in every a bite, the ratio of the exhaust velocity of auxiliary exhaust straight well and the gas injection speed of gas injection straight well 2 is 1/4 to 1/3.The capacity of horizontal production well 1 reduces to when not establishing auxiliary exhaust well 3 2/3, reduces the risk that the too early has channeling, gas lock, the live wire that cause because being vented in a large number are broken through too early.
In front auxiliary exhaust straight well group 31, from the end of net horizontal section 11 to auxiliary exhaust straight well before described in the first in the heel direction of net horizontal section 11 be auxiliary exhaust straight well 311 before first; Along the direction of net horizontal section 11, the distance before first between auxiliary exhaust straight well 311 and gas injection straight well 2 is 20 meters; Along the direction perpendicular to net horizontal section 11, the distance before first between auxiliary exhaust straight well 311 and net horizontal section 11 is 20 meters.In front auxiliary exhaust straight well group 31, the distance between adjacent two front auxiliary exhaust straight wells is 50 meters to 60 meters.
In a concrete embodiment, the distance of the described setting between the end of gas injection straight well 2 and horizontal production well 1 is 3 meters to 5 meters.The degree of depth of gas injection straight well 2 is 800 meters to 1500 meters, and the degree of depth of auxiliary exhaust well 3 is 800 meters to 1500 meters.The length of net horizontal section 11 is 100 meters to 1000 meters, and the degree of depth of Vertical Well section 12 is 800 meters to 1500 meters.
Illustrate implementation method of the present utility model below.
Step one, live wire is formed and extension phase; First auxiliary exhaust well is set in the side of net horizontal section 11, i.e. auxiliary exhaust straight well 311 before first; Along the direction of net horizontal section 11, the distance before first between auxiliary exhaust straight well 311 and gas injection straight well 2 is 20 meters; Along the direction perpendicular to net horizontal section 11, the distance before first between auxiliary exhaust straight well 311 and net horizontal section 11 is 20 meters; At the opposite side of net horizontal section 11, second mouthful of auxiliary exhaust well is set, namely after first after auxiliary exhaust straight well 321, first before auxiliary exhaust straight well 321 and first auxiliary exhaust straight well 311 about net horizontal section 11 axial symmetry.
When before first, auxiliary exhaust straight well 311 is nearer apart from gas injection straight well 2, auxiliary exhaust straight well 311 before live wire can break through first very soon, effectively can not play the effect of traction live wire; And when auxiliary exhaust straight well 311 is far away apart from gas injection straight well 2 before first, live wire offsets by the impact of warm field of handling up early stage, the effect expanding live wire spreading range can not be played; Through on-site measurement, when the distance before the direction first of net horizontal section 11 between auxiliary exhaust straight well 311 and gas injection straight well 2 is 20 meters, and along when being 20 meters perpendicular to the distance before the direction first of net horizontal section 11 between auxiliary exhaust straight well 311 and gas injection straight well 2, before first, auxiliary exhaust straight well 311 effectively can pull live wire, and expands live wire spreading range.
Step 2, the smooth combustion stage, in the side of net horizontal section 11, along the direction of net horizontal section 11, auxiliary exhaust straight well 312 before setting gradually second, auxiliary exhaust straight well 313 etc. before 3rd, and the distance between adjacent two front auxiliary exhaust straight wells is 50 meters to 60 meters, namely, distance before second before auxiliary exhaust straight well 312 and first between auxiliary exhaust straight well 311, with the distance before the 3rd before auxiliary exhaust straight well 313 and second between auxiliary exhaust straight well 312 is 50 meters to 60 meters, auxiliary exhaust straight well 311 before first, before second, before auxiliary exhaust straight well 312 and the 3rd, auxiliary exhaust straight well 313 constitutes front auxiliary exhaust straight well group 31.According to front auxiliary exhaust straight well group 31 and rear auxiliary exhaust straight well group 32 about net horizontal section 11 axial symmetry, at the opposite side of net horizontal section 11, to set gradually after second of rear auxiliary exhaust straight well group 32 auxiliary exhaust straight well 323 after auxiliary exhaust straight well 322, the 3rd.
In the smooth combustion stage, along with the increase of the spacing of two mouthfuls of auxiliary exhaust wells, the angle of live wire leading edge and net horizontal section 11 diminishes gradually, when more than 60 meters, in live wire progradation, leading edge can feed through to net horizontal section 11, and then easily breaks through horizontal production well 1, then fireflood assisted gravity drainage is produced and terminated.When auxiliary exhaust well well spacing is 50 meters to 60 meters, to live wire to pull effect better.
Step 3, gas injection straight well 2, all auxiliary exhaust wells penetrate out oil reservoir top and middle and upper part respectively.
Step 4, horizontal production well 1, gas injection straight well 2, the synchronous steam soak preheating of all auxiliary exhaust wells, until form unified continuous print thermal communication, and form draining cavity, after entering gravity fireflood, live wire can be formed and balanced development fast.
Step 5, before described in every a bite described in auxiliary exhaust straight well and every a bite after the capacity of auxiliary exhaust straight well be 1/2 with the ratio of the capacity of horizontal production well 1, before described in every a bite, described in the exhaust velocity of auxiliary exhaust straight well and every a bite, the ratio of the exhaust velocity of auxiliary exhaust straight well and the gas injection speed of gas injection straight well 2 is 1/4 to 1/3 afterwards.
In fireflood assisted gravity drainage process, output sharply declines with the minimizing of capacity, live wire leading edge temperature reduces with the minimizing of capacity, and impact scope reduces simultaneously, and reservoir pressure rises, fireflood deleterious even stops production, when auxiliary exhaust well is opened, capacity is horizontal production well 1/2, when exhaust velocity is 1/4 to 1/3 of gas injection speed, leading edge temperature and reservoir pressure are comparatively stable, and fireflood is produced and is able to steadily carry out smoothly.
The volume utilizing exhaust shaft to adjust the well pattern structure of fireflood assisted gravity drainage live wire form of the present utility model involves shape as shown in Figure 2, compared to the volume sweep conditions shown in prior art Fig. 4, be easy to find out from figure, the spreading range of its live wire obviously increases, and planar and in longitudinal direction can pull live wire, avoid live wire to break through horizontal production well 1, achieve the optimum expansion of live wire.Compared with the fireflood assisted gravity drainage well pattern structure that auxiliary exhaust well is not set in prior art, the recovery ratio increase rate increase at least 10% utilizing exhaust shaft to adjust the well pattern structure of fireflood assisted gravity drainage live wire form of the present utility model.
The foregoing is only the schematic detailed description of the invention of the utility model, and be not used to limit scope of the present utility model.Any those skilled in the art, the equivalent variations done under the prerequisite not departing from design of the present utility model and principle and amendment, all should belong to the scope of the utility model protection.And it should be noted that, each ingredient of the present utility model is not limited in above-mentioned overall applicability, the each technical characteristic described in manual of the present utility model can select one to adopt separately or select the multinomial use that combines according to actual needs, therefore, the utility model naturally covers other relevant with this case innovative point and combines and embody rule.
Claims (9)
1. the well pattern structure utilizing exhaust shaft to adjust fireflood assisted gravity drainage live wire form, it is characterized in that, described well pattern structure comprises horizontal production well (1), gas injection straight well (2) and auxiliary exhaust well (3), gas injection straight well (2) and horizontal production well (1) are positioned at a plane, horizontal production well (1) is containing net horizontal section (11) and Vertical Well section (12), along the direction of net horizontal section (11), the distance that between the end of gas injection straight well (2) and horizontal production well (1), interval sets, auxiliary exhaust well (3) is arranged on the one or both sides of net horizontal section (11).
2. the well pattern structure utilizing exhaust shaft to adjust fireflood assisted gravity drainage live wire form according to claim 1, it is characterized in that, auxiliary exhaust well (3) comprises the front auxiliary exhaust straight well group (31) and rear auxiliary exhaust straight well group (32) that are separately positioned on net horizontal section (11) both sides, the front auxiliary exhaust straight well that front auxiliary exhaust straight well group (31) is arranged containing multiple direction along net horizontal section (11), the rear auxiliary exhaust straight well that rear auxiliary exhaust straight well group (32) is arranged containing multiple direction along net horizontal section (11).
3. the well pattern structure utilizing exhaust shaft to adjust fireflood assisted gravity drainage live wire form according to claim 2, it is characterized in that, front auxiliary exhaust straight well group (31) and rear auxiliary exhaust straight well group (32) are about net horizontal section (11) axial symmetry.
4. the well pattern structure utilizing exhaust shaft to adjust fireflood assisted gravity drainage live wire form according to claim 2, it is characterized in that, before described in every a bite, the ratio of the capacity of auxiliary exhaust straight well and the capacity of horizontal production well (1) is 1/2, after described in every a bite, the ratio of the capacity of auxiliary exhaust straight well and the capacity of horizontal production well (1) is 1/2, before described in every a bite, the ratio of the exhaust velocity of auxiliary exhaust straight well and the gas injection speed of gas injection straight well (2) is 1/4 to 1/3, after described in every a bite, the ratio of the exhaust velocity of auxiliary exhaust straight well and the gas injection speed of gas injection straight well (2) is 1/4 to 1/3.
5. the well pattern structure utilizing exhaust shaft to adjust fireflood assisted gravity drainage live wire form according to claim 1, it is characterized in that, in front auxiliary exhaust straight well group (31), from the end of net horizontal section (11) to auxiliary exhaust straight well before described in the first in the heel direction of net horizontal section (11) be auxiliary exhaust straight well (311) before first; Along the direction of net horizontal section (11), distance before first between auxiliary exhaust straight well (311) and gas injection straight well (2) is 20 meters, along the direction perpendicular to net horizontal section (11), the distance before first between auxiliary exhaust straight well (311) and net horizontal section (11) is 20 meters.
6. the well pattern structure utilizing exhaust shaft to adjust fireflood assisted gravity drainage live wire form according to claim 5, it is characterized in that, in front auxiliary exhaust straight well group (31), the distance between adjacent two front auxiliary exhaust straight wells is 50 meters to 60 meters.
7. the well pattern structure utilizing exhaust shaft to adjust fireflood assisted gravity drainage live wire form according to claim 1, it is characterized in that, the distance of the described setting between the end of gas injection straight well (2) and horizontal production well (1) is 3 meters to 5 meters.
8. the well pattern structure utilizing exhaust shaft to adjust fireflood assisted gravity drainage live wire form according to claim 1, it is characterized in that, the degree of depth of gas injection straight well (2) is 800 meters to 1500 meters, and the degree of depth of auxiliary exhaust well (3) is 800 meters to 1500 meters.
9. the well pattern structure utilizing exhaust shaft to adjust fireflood assisted gravity drainage live wire form according to claim 1, it is characterized in that, the length of net horizontal section (11) is 100 meters to 1000 meters, and the degree of depth of Vertical Well section (12) is 800 meters to 1500 meters.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201420801255.3U CN204371284U (en) | 2014-12-16 | 2014-12-16 | Exhaust shaft is utilized to adjust the well pattern structure of fireflood assisted gravity drainage live wire form |
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| CN201420801255.3U CN204371284U (en) | 2014-12-16 | 2014-12-16 | Exhaust shaft is utilized to adjust the well pattern structure of fireflood assisted gravity drainage live wire form |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104963669A (en) * | 2015-07-02 | 2015-10-07 | 中国石油天然气股份有限公司 | Heavy oil thermal recovery method and well pattern thereof |
| CN105239989A (en) * | 2015-10-10 | 2016-01-13 | 中国石油天然气股份有限公司 | Oil recovery method |
| CN105971576A (en) * | 2016-07-11 | 2016-09-28 | 北京普新石油技术开发有限公司 | Method for exploiting extra-heavy oil or super-heavy oil in fireflood-assisted gravity oil drainage mode of horizontal wells |
| CN107939373A (en) * | 2018-01-17 | 2018-04-20 | 西南石油大学 | A kind of new combustion in situ heavy oil development well pattern structure and method |
| CN111810103A (en) * | 2020-07-31 | 2020-10-23 | 中国石油天然气股份有限公司 | Regulation and control method for improving fire flooding effect of thick-layer heavy oil reservoir by utilizing horizontal well |
| CN112267862A (en) * | 2020-11-06 | 2021-01-26 | 赵金岷 | Multi-channel exhaust longitudinal fracturing oil shale in-situ mining method |
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2014
- 2014-12-16 CN CN201420801255.3U patent/CN204371284U/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104963669A (en) * | 2015-07-02 | 2015-10-07 | 中国石油天然气股份有限公司 | Heavy oil thermal recovery method and well pattern thereof |
| CN105239989A (en) * | 2015-10-10 | 2016-01-13 | 中国石油天然气股份有限公司 | Oil recovery method |
| CN105239989B (en) * | 2015-10-10 | 2017-09-01 | 中国石油天然气股份有限公司 | Oil recovery processing method |
| CN105971576A (en) * | 2016-07-11 | 2016-09-28 | 北京普新石油技术开发有限公司 | Method for exploiting extra-heavy oil or super-heavy oil in fireflood-assisted gravity oil drainage mode of horizontal wells |
| CN107939373A (en) * | 2018-01-17 | 2018-04-20 | 西南石油大学 | A kind of new combustion in situ heavy oil development well pattern structure and method |
| CN107939373B (en) * | 2018-01-17 | 2019-03-15 | 西南石油大学 | A kind of novel combustion in situ heavy oil development well pattern structure and method |
| CN111810103A (en) * | 2020-07-31 | 2020-10-23 | 中国石油天然气股份有限公司 | Regulation and control method for improving fire flooding effect of thick-layer heavy oil reservoir by utilizing horizontal well |
| CN112267862A (en) * | 2020-11-06 | 2021-01-26 | 赵金岷 | Multi-channel exhaust longitudinal fracturing oil shale in-situ mining method |
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