CN103670353B - The SAGD technique of a kind of pair of branch horizontal well - Google Patents
The SAGD technique of a kind of pair of branch horizontal well Download PDFInfo
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- CN103670353B CN103670353B CN201310666382.7A CN201310666382A CN103670353B CN 103670353 B CN103670353 B CN 103670353B CN 201310666382 A CN201310666382 A CN 201310666382A CN 103670353 B CN103670353 B CN 103670353B
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Abstract
The present invention relates to a kind of branch horizontal well thermal recovery technology, particularly the SAGD technique of a kind of pair of branch horizontal well. This processing step is as follows: in two branch horizontal well Completion Operations, first directed upper horn mouth is installed, and is kept orientation, directed bell-mouthed inclined-plane consistent with hollow wedge deflection tool orientation; Secondly, Z1 branch well hole and Z2 branch well hole are lowered to respectively packer and seal nipple, and packing Z1 branch well hole and Z2 branch well hole annular space keep wiper seal. The present invention has realized the technical advantage that makes full use of two branch horizontal wells, improve recovery ratio and the rate of oil production of viscous crude and super viscous crude, reduce drilling well and cost for oil production, economy is employed difficulty and is adopted reserves, completes the workload of two mouthfuls of conventional levels wells with the two branch horizontal wells of a bite. Overcome existing SAGD technique and need to bore two mouthfuls of water horizontal wells, the deficiency that mud oil cost is high.
Description
Technical field:
The present invention relates to a kind of branch horizontal well thermal recovery technology, particularly the steam of a kind of pair of branch horizontal wellAssisted gravity drainage technique.
Background technology:
In recent years, utilize on a large scale Multilateral Wells exploitation heavy crude reservoir, buried hill oil pool, low-permeability oil deposit both at home and abroadAnd old liberated area Tapping Residual Oil, increase substantially recovery ratio and rate of oil production, reduce drilling cost and cost for oil production,Huge economic benefit and social benefit are obtained.
At present, most viscous crude and super viscous crude still need to use thermal process extraction, SAGD(SAGD), as the higher a kind of thermal process of recovery ratio, this technique generally need to be at close oil bearing bed placeBore a pair of horizontal well, flatly upper, flatly under, between keep certain distance. Top well is used for to oil-sandMiddle steam injection, heating in-place oil flows in lower well it under the effect of gravity, and lower well is directly openedAdopt. And the feature of two branch horizontal wells is to get out two horizontal holes in a main borehole, can open simultaneouslyAdopt the same oil reservoir on two oil reservoirs or different directions. Therefore, the two branch horizontal wells of a bite can be expired completelyThe requirement of foot SAGD (SAGD) technology. So just save drilling cost, fully profitBy the technical advantage of two branch horizontal wells. But the domestic SAGD technique that also there is no two branch horizontal wells at presentTechnical method.
Summary of the invention:
The technical problem to be solved in the present invention is to provide the SAGD work of a kind of pair of branch horizontal wellSkill, this technique has realized the technical advantage that makes full use of two branch horizontal wells, improves adopting of viscous crude and super viscous crudeYield and rate of oil production, reduce drilling well and cost for oil production, and economy is employed difficulty and adopted reserves, with the two branches of a bite waterHorizontal well completes the workload of two mouthfuls of conventional levels wells. Overcome existing SAGD technique and need to bore two mouthfuls of water horizontal wells,The deficiency that mud oil cost is high.
The technical solution used in the present invention is: the SAGD technique of a kind of pair of branch horizontal well,This processing step is as follows: in two branch horizontal well Completion Operations, first directed upper horn mouth is installed, and is protectedHold orientation, directed bell-mouthed inclined-plane consistent with hollow wedge deflection tool orientation; Secondly, Z1 branch well hole and Z2Branch well hole is lowered to respectively packer and seal nipple, packing Z1 branch well hole and Z2 branch well hole annular space,Keep wiper seal; Again, main wellhead packer, note are adopted valve, orientation joint, Z1 insertion oil pipe, Z2Insert oil pipe and go into the well together, after orientation joint aligns with directed upper horn mouth, after upper lifting pipe post, slowly transfer byZ1 inserts oil pipe and Z2 insertion oil pipe is inserted into respectively below the seal nipple of Z1 packer and Z2 packer,Main wellhead packer is given up; Finally pump is lowered into the above position of main wellhead packer, turn on pump is adopted valve at noteUnder effect, can carry out Z1 branch oil producing operation, while carrying out SAGD technological operation as need, carryGo out pump directly to pit shaft steam injection, adopt valve steam by note and enter in Z2 branch horizontal segment, so just can be realNow the two branch horizontal wells of a bite complete the SAGD technological operation of conventional two mouthfuls of water horizontal wells.
The invention has the beneficial effects as follows: the present invention makes full use of the technical advantage of two branch horizontal wells, improves thickRecovery ratio and the rate of oil production of oily and super viscous crude, reduce drilling well and cost for oil production, and economy is employed difficulty and adopted reserves,Complete the workload of two mouthfuls of conventional levels wells with the two branch horizontal wells of a bite.
Brief description of the drawings:
Below in conjunction with the drawings and specific embodiments, the present invention will be further described in detail.
Fig. 1 is schematic diagram of the present invention.
Detailed description of the invention:
As shown in Figure 1, the SAGD technique of a kind of pair of branch horizontal well, this technique realizedCheng Zhongxu uses following instrument: main wellhead packer 1, note are adopted horn mouth in valve 2, orientation joint 3, orientation4, hollow wedge deflection tool 5, hanger 6, Z2 insert oil pipe 7, Z2 packer 8, seal nipple II 9, base10, sleeve pipe 11, seal nipple I 12, Z1 packer 13, Z1 insert oil pipe 14. This processing step is as follows:In two branch horizontal well Completion Operations, first directed upper horn mouth 4 is installed, and is kept directed upper horn mouth 4Orientation, inclined-plane consistent with hollow wedge deflection tool 5 orientation; Secondly, Z1 branch well hole and Z2 branch well hole are respectivelyBe lowered to packer and seal nipple, packing Z1 branch well hole and Z2 branch well hole annular space, keep wiper sealProperty; Again, main wellhead packer 1, note are adopted valve 2, orientation joint 3, Z1 insertion oil pipe 14, Z2 insertionOil pipe 7 is gone into the well together, and orientation joint 3 is slowly transferred after upper lifting pipe post after aligning with directed upper horn mouth 4Z1 is inserted to oil pipe 14 and Z2 to be inserted oil pipe 7 and is inserted into respectively Z1 packer 13 and Z2 packer 8Below seal nipple, main wellhead packer 1 is given up; Finally pump is lowered into main wellhead packer 1 with upperPut, turn on pump is adopted at note under the effect of valve 2 can carry out Z1 branch oil producing operation, and as need, to carry out steam auxiliary heavyWhen the technological operation of power draining, propose pump directly to pit shaft steam injection, adopt valve 2 steam by note and enter Z2 branchIn horizontal segment, so just can realizing the two branch horizontal wells of a bite, to complete the steam of conventional two mouthfuls of water horizontal wells auxiliaryGravity drainage technological operation.
Be understandable that, above about specific descriptions of the present invention, only for being described, the present invention is not subject toBe limited to the described technical scheme of the embodiment of the present invention, those of ordinary skill in the art should be appreciated that stillCan modify or be equal to replacement the present invention, to reach identical technique effect; Use need as long as meetWant, all within protection scope of the present invention.
Claims (1)
1. a SAGD technique for two branch horizontal wells, is characterized in that: this processing stepAs follows: in two branch horizontal well Completion Operations, directed upper horn mouth (4) to be first installed, and to be kept in orientationThe orientation, inclined-plane of horn mouth (4) is consistent with hollow wedge deflection tool (5) orientation; Secondly, Z1 branch well hole and Z2Branch well hole is lowered to respectively packer and seal nipple, packing Z1 branch well hole and Z2 branch well hole annular space,Keep wiper seal; Again, main wellhead packer (1), note are adopted valve (2), orientation joint (3), Z1Insertion oil pipe (14), Z2 insert oil pipe (7) and go into the well together, orientation joint (3) and directed upper horn mouth (4)After aligning, after upper lifting pipe post, slowly transfer and Z1 is inserted to oil pipe (14) and Z2 insert oil pipe (7) and insert respectivelyEnter below the seal nipple of Z1 packer (13) and Z2 packer (8) main wellhead packer (1)Give up; Finally pump is lowered into the above position of main wellhead packer (1), turn on pump is adopted the effect of valve (2) at noteUnder can carry out Z1 branch oil producing operation, while carrying out SAGD technological operation as need, propose pumpDirectly, to pit shaft steam injection, adopt valve (2) steam by note and enter in Z2 branch horizontal segment, so just can be realNow the two branch horizontal wells of a bite complete the SAGD technological operation of conventional two mouthfuls of water horizontal wells.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310666382.7A CN103670353B (en) | 2013-12-09 | 2013-12-09 | The SAGD technique of a kind of pair of branch horizontal well |
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| CN201310666382.7A CN103670353B (en) | 2013-12-09 | 2013-12-09 | The SAGD technique of a kind of pair of branch horizontal well |
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| CN103670353A CN103670353A (en) | 2014-03-26 |
| CN103670353B true CN103670353B (en) | 2016-05-11 |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104563989A (en) * | 2014-12-26 | 2015-04-29 | 中国石油天然气股份有限公司 | Same-well injection-production thermal oil extraction method for horizontal well and tubular column thereof |
| CN104895535B (en) * | 2015-05-12 | 2017-07-07 | 中国石油天然气股份有限公司 | Buried hill oil reservoir branch well gas cap energy supplementing process pipe column |
| CN105089593A (en) * | 2015-08-03 | 2015-11-25 | 中国石油天然气股份有限公司 | SAGD well completion structure and exploitation method |
| CN105672967B (en) * | 2016-03-16 | 2018-09-04 | 中国石油天然气股份有限公司 | Tubular column for SAGD (steam assisted gravity drainage) double-horizontal well and oil extraction method thereof |
| CN115929273A (en) * | 2023-01-08 | 2023-04-07 | 西南石油大学 | Shale gas layer high-temperature high-pressure fracturing method based on geothermal energy |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2009126376A2 (en) * | 2008-04-10 | 2009-10-15 | Schlumberger Canada Limited | System and method for drilling multilateral wells using magnetic ranging while drilling |
| CN101855421A (en) * | 2007-07-06 | 2010-10-06 | 哈利伯顿能源服务公司 | Heated fluid injection using multilateral wells |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101855421A (en) * | 2007-07-06 | 2010-10-06 | 哈利伯顿能源服务公司 | Heated fluid injection using multilateral wells |
| WO2009126376A2 (en) * | 2008-04-10 | 2009-10-15 | Schlumberger Canada Limited | System and method for drilling multilateral wells using magnetic ranging while drilling |
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Effective date of registration: 20200928 Address after: 100120 Beijing Xicheng District six laying Kang Patentee after: CHINA NATIONAL PETROLEUM Corp. Patentee after: China National Petroleum Corporation Great Wall Drilling Engineering Co.,Ltd. Address before: 124010 Xinglongtai, Liaoning Province, oil street, No. 96, No. Patentee before: China National Petroleum Corporation Great Wall Drilling Engineering Co.,Ltd. |