CN103670353A - Steam assisted gravity drainage technology of double-branch horizontal well - Google Patents
Steam assisted gravity drainage technology of double-branch horizontal well Download PDFInfo
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- CN103670353A CN103670353A CN201310666382.7A CN201310666382A CN103670353A CN 103670353 A CN103670353 A CN 103670353A CN 201310666382 A CN201310666382 A CN 201310666382A CN 103670353 A CN103670353 A CN 103670353A
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Abstract
The invention relates to a thermal recovery technology of a branched horizontal well, in particular to a steam assisted gravity drainage technology of a double-branch horizontal well. The steam assisted gravity drainage technology of the double-branch horizontal well comprises the following steps that (1) in the process of well completion of the double-branch horizontal well, an upper directional horn-shaped opening is installed, and the slope direction of the upper directional horn-shaped opening is kept to be consistent with the direction of a hollow inclination guiding device; (2) a packer and a seal joint are installed in a branch well Z1 and a branch well Z2 respectively, and are used for sealing the branch well Z1 and enabling the branch well Z2 to form an annular space, and pressure leakproofness is kept. According to the steam assisted gravity drainage technology of the double-branch horizontal well, due to the fact that the technical advantages of the double-branch horizontal well are made full use of, the purposes that the recovery ratio of heavy oil and the recovery ratio of super heavy oil are increased, the oil production rate of heavy oil and the oil production rate of super heavy oil are increased, the well drilling cost and the oil production cost are reduced, the hard-to-recover reserve is used economically, and the workload of two common horizontal wells is accomplished through one double-branch horizontal well are achieved. The defects that according to an existing SAGD technology, two horizontal wells need to be drilled, and the well drilling cost and the oil production cost are high are overcome.
Description
Technical field:
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.
Background technology:
In recent years, utilize on a large scale Multilateral Wells exploitation heavy crude reservoir, buried hill oil pool, low-permeability oil deposit and old liberated area Tapping Residual Oil both at home and abroad, increase substantially recovery ratio and rate of oil production, reduce drilling cost and cost for oil production, obtained huge economic benefit and social benefit.
At present, most viscous crude and super viscous crude still need to use thermal process extraction, and SAGD (SAGD) is as the higher a kind of thermal process of recovery ratio, and this technique generally need to bored a pair of horizontal well near oil bearing bed place, flatly upper, flatly under, between keep certain distance.Top well, for to oil-sand steam injection, heats in-place oil, and it is flowed in lower well under the effect of gravity, and lower well is directly exploited.And the feature of two branch horizontal wells is to get out two horizontal holes in a main borehole, can exploit the same oil reservoir on two oil reservoirs or different directions simultaneously.Therefore, the two branch horizontal wells of a bite can meet the requirement of SAGD (SAGD) technology completely.So just save drilling cost, made full use of the technical advantage of two branch horizontal wells.But the current domestic SAGD technology method that also there is no two branch horizontal wells.
Summary of the invention:
The technical problem to be solved in the present invention is to provide the SAGD technique of a kind of pair of branch horizontal well, this technique 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.
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 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; Again, main wellhead packer, note adopt that valve, orientation joint, Z1 insert oil pipe, Z2 inserts oil pipe and goes into the well together, after orientation joint aligns with directed upper horn mouth, after upper lifting pipe post, slowly transfer and Z1 is inserted to oil pipe and Z2 insert oil pipe and be inserted into respectively below the seal nipple of Z1 packer and Z2 packer, main wellhead packer is given up; Finally will arrive pump and be lowered into the above position of main wellhead packer, turn on pump is adopted at note under the effect of valve can carry out Z1 branch oil producing operation, while carrying out SAGD technological operation as need, pump is proposed directly to pit shaft steam injection, by note, adopt valve steam and enter in Z2 branch horizontal segment, so just can realize the SAGD technological operation that the two branch horizontal wells of a bite complete 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, 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.
Accompanying drawing explanation:
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.
The specific embodiment:
As shown in Figure 1, a SAGD technique for pair branch horizontal well, needs to use following instrument in this technique implementation procedure: main wellhead packer 1, note are adopted horn mouth 4 in valve 2, orientation joint 3, orientation, hollow wedge deflection tool 5, hanger 6, Z2 insertion oil pipe 7, Z2 packer 8, seal nipple II 9, base 10, sleeve pipe 11, seal nipple I 12, Z1 packer 13, Z1 and inserted 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 the orientation, inclined-plane of directed upper horn mouth 4 consistent with hollow wedge deflection tool 5 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; Again, main wellhead packer 1, note adopt that valve 2, orientation joint 3, Z1 insert oil pipe 14, Z2 inserts oil pipe 7 and goes into the well together, after orientation joint 3 aligns with directed upper horn mouth 4, after upper lifting pipe post, slowly transfer and Z1 is inserted to oil pipe 14 and Z2 insert oil pipe 7 and be inserted into respectively below the seal nipple of Z1 packer 13 and Z2 packer 8, main wellhead packer 1 is given up; Finally will arrive pump and be lowered into the above position of main wellhead packer 1, turn on pump is adopted at note under the effect of valve 2 can carry out Z1 branch oil producing operation, while carrying out SAGD technological operation as need, pump is proposed directly to pit shaft steam injection, by note, adopt valve 2 steam and enter in Z2 branch horizontal segment, so just can realize the SAGD technological operation that the two branch horizontal wells of a bite complete conventional two mouthfuls of water horizontal wells.
Be understandable that, above about specific descriptions of the present invention, only for being described, the present invention is not limited to the described technical scheme of the embodiment of the present invention, those of ordinary skill in the art is to be understood that, still can modify or be equal to replacement the present invention, to reach identical technique effect; As long as meet, use needs, all within protection scope of the present invention.
Claims (1)
1. the SAGD technique of two branch horizontal wells, it is characterized in that: this processing step is as follows: in two branch horizontal well Completion Operations, directed upper horn mouth (4) is first installed, and is kept the orientation, inclined-plane of directed upper horn mouth (4) consistent with hollow wedge deflection tool (5) 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; Again, main wellhead packer (1), note adopt that valve (2), orientation joint (3), Z1 insert oil pipe (14), Z2 inserts oil pipe (7) and goes into the well together, after orientation joint (3) aligns with directed upper horn mouth (4), after upper lifting pipe post, slowly transfer and Z1 is inserted to oil pipe (14) and Z2 insert oil pipe (7) and be inserted into respectively below the seal nipple of Z1 packer (13) and Z2 packer (8), main wellhead packer (1) is given up; Finally will arrive pump and be lowered into the above position of main wellhead packer (1), turn on pump is adopted at note under the effect of valve (2) can carry out Z1 branch oil producing operation, while carrying out SAGD technological operation as need, pump is proposed directly to pit shaft steam injection, by note, adopt valve (2) steam and enter in Z2 branch horizontal segment, so just can realize the SAGD technological operation that the two branch horizontal wells of a bite complete 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 true CN103670353A (en) | 2014-03-26 |
| CN103670353B CN103670353B (en) | 2016-05-11 |
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Cited By (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 | In-the-same-well injection-production thermal production method for horizontal well and pipe column for method |
| CN104895535A (en) * | 2015-05-12 | 2015-09-09 | 中国石油天然气股份有限公司 | Buried hill oil pool branch well gas cap energy replenishment process string |
| 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 mining method |
| CN105672967A (en) * | 2016-03-16 | 2016-06-15 | 中国石油天然气股份有限公司 | Tubular column for SAGD double horizontal well and oil production method of tubular column |
| 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 |
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| 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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2013
- 2013-12-09 CN CN201310666382.7A patent/CN103670353B/en active Active
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 |
Cited By (7)
| 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 | In-the-same-well injection-production thermal production method for horizontal well and pipe column for method |
| CN104895535A (en) * | 2015-05-12 | 2015-09-09 | 中国石油天然气股份有限公司 | Buried hill oil pool branch well gas cap energy replenishment process string |
| CN104895535B (en) * | 2015-05-12 | 2017-07-07 | 中国石油天然气股份有限公司 | Buried hill oil pool Multilateral Wells pneumatic jack complementary energy process pipe string |
| 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 mining method |
| CN105672967A (en) * | 2016-03-16 | 2016-06-15 | 中国石油天然气股份有限公司 | Tubular column for SAGD double horizontal well and oil production method of tubular column |
| CN105672967B (en) * | 2016-03-16 | 2018-09-04 | 中国石油天然气股份有限公司 | The tubing string and its oil production method of SAGD dual horizontal wells |
| 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 |
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| CN103670353B (en) | 2016-05-11 |
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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. |