CN101956544A - Method for oil extraction in multi-bottom and multi-branch well by artesian injection - Google Patents
Method for oil extraction in multi-bottom and multi-branch well by artesian injection Download PDFInfo
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- CN101956544A CN101956544A CN2009100551145A CN200910055114A CN101956544A CN 101956544 A CN101956544 A CN 101956544A CN 2009100551145 A CN2009100551145 A CN 2009100551145A CN 200910055114 A CN200910055114 A CN 200910055114A CN 101956544 A CN101956544 A CN 101956544A
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Abstract
The invention relates to a method for oil extraction in a multi-bottom and multi-branch well by artesian injection. The method is realized through the following steps of: digging a first well and a second well; drilling injection branches in the first well by utilizing a general drilling technology, wherein the injection branches penetrate through a water layer and an oil layer below the water layer; putting down a slotted pipe to communicate the water layer and the oil layer, wherein water of the water layer naturally flows to the oil layer to complement the energy of the oil layer because the water layer has high pressure and the oil layer has low pressure; making a cement plug to plug the joint of a branch and a first borehole; extracting oil from the oil layer by adopting the second well; and drilling a first oil extraction branch and a second oil extraction in the first well by utilizing the general drilling technology to utilize the oil extraction function of the first well. The invention has the advantages of improving the strata pressure of the oil layer with poor water body energy, increasing the yield of the oil layer, realizing the two functions of oil extraction and artesian injection, saving well slots and providing convenience for subsequent production increase.
Description
Technical field
The present invention relates to a kind of method of oil recovery.
Background technology
Crude oil can be divided into two flowing stages from the underground process that flows to well head, and the one, flow to the shaft bottom from the stratum, the 2nd, flow to well head from the shaft bottom.
Crude oil flows to the shaft bottom energy mainly by the expansion of formation fluid, the compression and the water body support of rock from the stratum, wherein the elastic energy that provides of rock and formation fluid is little, and oil production is few.If do not have water body or water energy very little, strata pressure descends fast, and crude output successively decreases soon, and recovery ratio is very low, at this moment just needs to adopt artificial recharge that the energy displacement of reservoir oil is provided.
Artificial recharge need seek sources of water, water treatment facilities, supercharging equipment, and beats water injection well in addition, and this water-filling method investment is big, and is uneconomical to the oil field that crude output is less.How utilizing flood suction and same well thereof that the method for recovering the oil is arranged is the problem that the technician will solve.
Summary of the invention
The technical issues that need to address of the present invention have provided the method that multilateral well of a kind of many ends utilizes flood suction to recover the oil, and are intended to solve the above problems.
In order to solve the problems of the technologies described above, the present invention realizes by following steps:
Make a call to first mouthful of well and second mouthful of well;
Utilize the conventional drilling technology to bore water filling branch at first mouthful of well, the oil reservoir under water layer and the water layer passes through in water filling branch;
Water filling branch is lowered to slot pipe trench water flowing layer and oil reservoir after boring; Because the aquifer pressure height, formation pressure is low, and the water of water layer flow into oil reservoir automatically, is the oil reservoir makeup energy;
After water filling branch slot pipe is lowered to, the cementing plug shutoff branch and the first well binding site;
Adopt second mouthful of well that oil reservoir is recovered the oil;
Utilize the conventional drilling technology to bore the first oil recovery branch horizontal segment at the First well, be lowered to the slot pipe after the finishing drilling;
Be lowered to then whipstock and block the first oil recovery branch, utilize the drill bit window sidetracking second oil recovery branch horizontal segment, be lowered to the slot pipe after brill is good, take out at last whipstock, link up the first oil recovery branch and the second oil recovery branch, realize the oil recovery function of this First well.
Compared with prior art, the invention has the beneficial effects as follows: improved the weak oil reservoir strata pressure of water energy, improved the recovery ratio of this layer; A bite well is realized two kinds of functions of oil-extracting and water-injecting, has saved well slot, for follow-up well stimulation is provided convenience.
Description of drawings
Fig. 1 adopts schematic diagram of the present invention.
The specific embodiment
Below in conjunction with the accompanying drawing and the specific embodiment the present invention is described in further detail:
As seen from Figure 1: the present invention realizes by following steps:
Beat First well A and second mouthful of well B;
Utilize the conventional drilling technology to bore water filling branch 1 at first mouthful of well, the oil reservoir 3 under water layer 20 and the water layer 20 passes through in water filling branch;
After water filling branch bores, be lowered to slot pipe trench water flowing layer 20 and oil reservoir 3; Because the aquifer pressure height, oil reservoir 3 pressure are low, and the water of water layer flow into oil reservoir 3 automatically, is oil reservoir 3 makeup energy;
After water filling branch 1 slot pipe is lowered to, the cementing plug 4 shutoff branches and the first well binding site;
Adopt second mouthful of well B that oil reservoir 3 is recovered the oil;
Utilize the conventional drilling technology to bore the first oil recovery branch, 30 horizontal segments at the First well, be lowered to the slot pipe after the finishing drilling;
Be lowered to then whipstock and block the first oil recovery branch 30, utilize the drill bit window sidetracking second oil recovery branch 40 horizontal segments, be lowered to the slot pipe after brill is good, take out at last whipstock, link up the first oil recovery branch 30 and the second oil recovery branch 40, realize the oil recovery function of this First well.
The present invention realizes the flood suction function, is subjected to the influence of water filling, and the multiple-limb producing well well head pressure of exploitation oil reservoir 3 raises, and daily oil production increases.After water filling branch 1 slot pipe was lowered to, cementing plug shutoff branch and main borehole binding site were realized the flood suction function.Position, length for water filling branch 1 can in conjunction with geology, Reservoir Data analysis-by-synthesis, propose optimum results.
The oil recovery function of multiple-limb water flood recovery well of many ends of the present invention utilizes the conventional drilling technology to bore the first oil recovery branch horizontal segment, is lowered to the slot pipe after the finishing drilling; Be lowered to then whipstock and block the first oil recovery branch, utilize the drill bit window sidetracking second oil recovery branch horizontal segment, be lowered to the slot pipe after brill is good, take out at last whipstock, link up the first oil recovery branch 30 and the second oil recovery branch 40, realize the oil recovery function of this well.
The present invention can realize:
Improve the weak oil reservoir strata pressure of water energy, improved the recovery ratio of this layer;
Save ground water injection equipment investment and the new expense of boring water injection well of part, improved Project Economy Benefit;
A bite well has been linked up a plurality of oil reservoirs, has improved the reserves development degree, has realized the exploitation to oil sheet, poor connectivity oil reservoir, little reserves oil reservoir;
A bite well is realized two kinds of functions of oil-extracting and water-injecting, has saved well slot, for follow-up well stimulation is provided convenience.
Claims (1)
1. end multilateral well more than a kind utilizes the method that flood suction recovers the oil, and realizes by following steps:
Make a call to first mouthful of well and second mouthful of well;
Utilize the conventional drilling technology to bore water filling branch at first mouthful of well, the oil reservoir under water layer and the water layer passes through in water filling branch;
Water filling branch is lowered to slot pipe trench water flowing layer and oil reservoir after boring; Because the aquifer pressure height, formation pressure is low, and the water of water layer flow into oil reservoir automatically, is the oil reservoir makeup energy;
After water filling branch slot pipe is lowered to, the cementing plug shutoff branch and the first well binding site;
Adopt second mouthful of well that oil reservoir is recovered the oil;
Utilize the conventional drilling technology to bore the first oil recovery branch horizontal segment at the First well, be lowered to the slot pipe after the finishing drilling;
Be lowered to then whipstock and block the first oil recovery branch, utilize the drill bit window sidetracking second oil recovery branch horizontal segment, be lowered to the slot pipe after brill is good, take out at last whipstock, link up the first oil recovery branch and the second oil recovery branch, realize the oil recovery function of this First well.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200910055114 CN101956544B (en) | 2009-07-21 | 2009-07-21 | Method for oil extraction in multi-bottom and multi-branch well by artesian injection |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN 200910055114 CN101956544B (en) | 2009-07-21 | 2009-07-21 | Method for oil extraction in multi-bottom and multi-branch well by artesian injection |
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| CN101956544A true CN101956544A (en) | 2011-01-26 |
| CN101956544B CN101956544B (en) | 2013-01-02 |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102650205A (en) * | 2012-04-27 | 2012-08-29 | 中国石油天然气股份有限公司 | Method for producing oil by changing bottom water reservoir oil well into water dumping well and oil production well system |
| CN104612637A (en) * | 2015-02-16 | 2015-05-13 | 中国海洋石油总公司 | Dump injection process of separate-layer distributional injection oilfield |
| CN104695926A (en) * | 2014-12-30 | 2015-06-10 | 王作韬 | Low temperature geothermal energy production technique method |
| CN104790931A (en) * | 2015-03-10 | 2015-07-22 | 中国海洋石油总公司 | On-sea low-permeability reservoir thin interbed injection-recovery branched well control-increased method |
| CN106368654A (en) * | 2016-09-05 | 2017-02-01 | 中国石油化工股份有限公司 | Oil extraction control tubular column and method of multilateral well |
| CN109236249A (en) * | 2018-11-05 | 2019-01-18 | 中国石油天然气股份有限公司 | Bi-lateral horizontal well changes shaft bottom production method |
| CN110984917A (en) * | 2019-11-15 | 2020-04-10 | 中国海洋石油集团有限公司 | Production-increasing water-controlling sand-preventing well completion method for low-permeability reservoir |
| CN111456694A (en) * | 2019-01-17 | 2020-07-28 | 中国石油天然气股份有限公司 | Method and device for determining pressure limiting of artesian water injection water source layer door of carbonate rock oil well |
| CN114320240A (en) * | 2021-12-30 | 2022-04-12 | 中国石油大学(北京) | Marine hydrate gathering and injecting system and method |
| CN115614009A (en) * | 2021-07-13 | 2023-01-17 | 中国石油天然气股份有限公司 | Method for improving recovery ratio of four-high reservoir artesian injection with large bottom water |
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102650205A (en) * | 2012-04-27 | 2012-08-29 | 中国石油天然气股份有限公司 | Method for producing oil by changing bottom water reservoir oil well into water dumping well and oil production well system |
| CN104695926A (en) * | 2014-12-30 | 2015-06-10 | 王作韬 | Low temperature geothermal energy production technique method |
| CN104612637A (en) * | 2015-02-16 | 2015-05-13 | 中国海洋石油总公司 | Dump injection process of separate-layer distributional injection oilfield |
| CN104790931A (en) * | 2015-03-10 | 2015-07-22 | 中国海洋石油总公司 | On-sea low-permeability reservoir thin interbed injection-recovery branched well control-increased method |
| CN106368654A (en) * | 2016-09-05 | 2017-02-01 | 中国石油化工股份有限公司 | Oil extraction control tubular column and method of multilateral well |
| CN106368654B (en) * | 2016-09-05 | 2021-04-23 | 中国石油化工股份有限公司 | Multi-branch well control oil production pipe column and method |
| CN109236249A (en) * | 2018-11-05 | 2019-01-18 | 中国石油天然气股份有限公司 | Bi-lateral horizontal well changes shaft bottom production method |
| CN111456694A (en) * | 2019-01-17 | 2020-07-28 | 中国石油天然气股份有限公司 | Method and device for determining pressure limiting of artesian water injection water source layer door of carbonate rock oil well |
| CN111456694B (en) * | 2019-01-17 | 2022-05-06 | 中国石油天然气股份有限公司 | Method and device for determining pressure limiting of artesian water injection water source layer door of carbonate rock oil well |
| CN110984917A (en) * | 2019-11-15 | 2020-04-10 | 中国海洋石油集团有限公司 | Production-increasing water-controlling sand-preventing well completion method for low-permeability reservoir |
| CN115614009A (en) * | 2021-07-13 | 2023-01-17 | 中国石油天然气股份有限公司 | Method for improving recovery ratio of four-high reservoir artesian injection with large bottom water |
| CN114320240A (en) * | 2021-12-30 | 2022-04-12 | 中国石油大学(北京) | Marine hydrate gathering and injecting system and method |
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| CN101956544B (en) | 2013-01-02 |
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