CN105201449A - Water plugging method for thickened oil thermal recovery horizontal well - Google Patents
Water plugging method for thickened oil thermal recovery horizontal well Download PDFInfo
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- CN105201449A CN105201449A CN201510659056.2A CN201510659056A CN105201449A CN 105201449 A CN105201449 A CN 105201449A CN 201510659056 A CN201510659056 A CN 201510659056A CN 105201449 A CN105201449 A CN 105201449A
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Abstract
The invention relates to the technical field of water plugging for horizontal wells, in particular to a water plugging method for a thickened oil thermal recovery horizontal well. The method comprises the steps that firstly, nitrogen is injected to push stratum water to an oil-water boundary by means of the oil-water fluidity difference; secondly, a lignin water plugging agent is injected, polyacrylamide is adopted as carrier fluid, at the moment, the nitrogen injected in the first step can play a role in isolating stratum water from the lignin water plugging agent, and the lignin water plugging agent enters a stratum water onrush channel; thirdly, nitrogen is injected to eject the lignin water plugging agent to the bottom end of the stratum water onrush channel; fourthly, well shut-in and soak are carried out, and the lignin water plugging agent swells when encountering water to plug the stratum water onrush channel; fifthly, well opening and production are carried out. According to the water plugging method, oil production increment and water cut declination are achieved, the water cut declination effect is obvious, the application range is wide, the requirement for a completion method and water exit points is low, and the defects that an existing water plugging technology cannot meet the water plugging requirement of the thickened oil horizontal well and the phenomenon that oil production increment is not achieved during water plugging is likely to occur are overcome.
Description
Technical field:
The present invention relates to water plugging of horizontal well technical field, particularly a kind of heavy crude heat extraction water plugging of horizontal well method.
Background technology:
Horizontal well, as the mode improving exploitation heavy crude reservoir efficiency, achieves very good effect in early stage.In the whole nation and even world wide, obtain large-scale application, achieve outstanding economic benefit.China's viscous crude distribution is extensive, and North China, Xinjiang, the Liaohe River, triumphantly each elephant are all faced with a difficult problem for heavy oil development.For horizontal well due to casing programme own and formation anisotropy, the drainage area of horizontal well is far longer than straight well, and cause horizontal well edge-bottom water to advance by leaps and bounds excessive velocities, the water breakthrough time is short, occurs the situation of High water cut closing well.Causing horizontal well can not long term stable production high yield.Therefore be badly in need of for the effective water-plugging technique of horizontal well.But existing shutoff method has strict requirement to completion mode or Water breakthrough characteristics, scope on probation is restricted, or can not meet thick oil horizontal well water blockoff needs, and existing water-plugging technique has more the phenomenon that existing water blockoff does not increase oil.
Summary of the invention:
The technical problem to be solved in the present invention is to provide a kind of heavy crude heat extraction water plugging of horizontal well method, the method achieves oil increasing precipitation, and dewatering effect is obvious, applied widely, low to the requirement of completion mode and EXIT POINT.Overcome existing water-plugging technique and can not meet thick oil horizontal well water blockoff needs, easily occur that water blockoff does not increase the deficiency of the phenomenon of oil.
The technical solution used in the present invention is: a kind of heavy crude heat extraction water plugging of horizontal well method, and the method step is as follows:
One, nitrogen injection, utilizes profit mobility difference that formation water is pushed into oils water boundary place;
Two, injecting lignin water shutoff agent, adopting polyacrylamide as carrying liquid, the nitrogen now injected in step one can play the object by formation water and the isolation of lignin water shutoff agent, and lignin water shutoff agent enters formation water and to advance by leaps and bounds passage;
Three, lignin water shutoff agent top to formation water is advanced by leaps and bounds passage bottom by nitrogen injection;
Four, closing well boils in a covered pot over a slow fire well, and lignin water shutoff agent water-swellable blocks formation water and to advance by leaps and bounds passage;
Five, drive a well operation.
Concentration of polyacrylamide is 0.8%.
Lignin water shutoff agent concentration is 1%.
The invention has the beneficial effects as follows: the object that invention achieves oil increasing precipitation, dewatering effect is obvious, applied widely, low to the requirement of completion mode and EXIT POINT.
Accompanying drawing illustrates:
Below in conjunction with the drawings and specific embodiments, the present invention will be further described in detail.
Fig. 1 is nitrogen kill-job schematic diagram.
Fig. 2 is that lignin water shutoff agent shutoff formation water is advanced by leaps and bounds access diagram.
Detailed description of the invention:
A kind of heavy crude heat extraction water plugging of horizontal well method, the method step is as follows:
One, nitrogen injection, NPU1200 type nitrogen generating vehicle is with 1200m
3/ h (mark condition discharge capacity) injects, and utilizes profit mobility difference that formation water is pushed into oils water boundary place, as shown in Figure 1;
Two, lignin water shutoff agent is injected, adopt polyacrylamide as carrying liquid, lignin water shutoff agent concentration is 1%, concentration of polyacrylamide is 0.8%, the nitrogen now injected in step one can play the object by formation water and the isolation of lignin water shutoff agent, and lignin water shutoff agent enters formation water and to advance by leaps and bounds passage;
Three, lignin water shutoff agent top to formation water is advanced by leaps and bounds passage bottom by nitrogen injection;
Four, closing well boils in a covered pot over a slow fire well, and lignin water shutoff agent water-swellable blocks formation water and to advance by leaps and bounds passage, as shown in Figure 2;
Five, drive a well operation.
Be understandable that, above about specific descriptions of the present invention, the technical scheme described by the embodiment of the present invention is only not limited to for illustration of the present invention, those of ordinary skill in the art is to be understood that, still can modify to the present invention or equivalent replacement, to reach identical technique effect; Needs are used, all within protection scope of the present invention as long as meet.
Claims (3)
1. a heavy crude heat extraction water plugging of horizontal well method, is characterized in that: the method step is as follows:
One, nitrogen injection, utilizes profit mobility difference that formation water is pushed into oils water boundary place;
Two, injecting lignin water shutoff agent, adopting polyacrylamide as carrying liquid, the nitrogen now injected in step one can play the object by formation water and the isolation of lignin water shutoff agent, and lignin water shutoff agent enters formation water and to advance by leaps and bounds passage;
Three, lignin water shutoff agent top to formation water is advanced by leaps and bounds passage bottom by nitrogen injection;
Four, closing well boils in a covered pot over a slow fire well, and lignin water shutoff agent water-swellable blocks formation water and to advance by leaps and bounds passage;
Five, drive a well operation.
2. according to heavy crude heat extraction water plugging of horizontal well method according to claim 1, it is characterized in that: described concentration of polyacrylamide is 0.8%.
3. according to heavy crude heat extraction water plugging of horizontal well method according to claim 1, it is characterized in that: described lignin water shutoff agent concentration is 1%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510659056.2A CN105201449A (en) | 2015-10-14 | 2015-10-14 | Water plugging method for thickened oil thermal recovery horizontal well |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510659056.2A CN105201449A (en) | 2015-10-14 | 2015-10-14 | Water plugging method for thickened oil thermal recovery horizontal well |
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| CN105201449A true CN105201449A (en) | 2015-12-30 |
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| CN201510659056.2A Pending CN105201449A (en) | 2015-10-14 | 2015-10-14 | Water plugging method for thickened oil thermal recovery horizontal well |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106589257A (en) * | 2016-12-09 | 2017-04-26 | 孙安顺 | Preparation method of lignin grafted and copolymerized polymer flocculation type profile modifying/water plugging agent |
| CN106639977A (en) * | 2016-12-12 | 2017-05-10 | 张会利 | Selective water plugging method of oil well in oil extraction process |
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| US6910537B2 (en) * | 1999-04-30 | 2005-06-28 | The Regents Of The University Of California | Canister, sealing method and composition for sealing a borehole |
| CN101139920A (en) * | 2007-10-26 | 2008-03-12 | 辽河石油勘探局 | Dibasic composite horizontal well bottom water plugging technique |
| CN102587873A (en) * | 2011-12-01 | 2012-07-18 | 中国石油天然气股份有限公司 | Carbon oxide huff-n-puff, water control and oil increment method for horizontal well |
| CN102926701A (en) * | 2012-10-31 | 2013-02-13 | 中国石油集团川庆钻探工程有限公司 | Continuous mixing type water plugging technique |
| CN104121000A (en) * | 2014-07-11 | 2014-10-29 | 中国石油集团川庆钻探工程有限公司工程技术研究院 | Low-permeability fractured reservoir cased hole completion horizontal well water plugging method |
| CN104629698A (en) * | 2015-01-19 | 2015-05-20 | 中国石油天然气股份有限公司 | Water plugging agent and water plugging method of thick oil buried hill edge-bottom water reservoir |
-
2015
- 2015-10-14 CN CN201510659056.2A patent/CN105201449A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6910537B2 (en) * | 1999-04-30 | 2005-06-28 | The Regents Of The University Of California | Canister, sealing method and composition for sealing a borehole |
| CN101139920A (en) * | 2007-10-26 | 2008-03-12 | 辽河石油勘探局 | Dibasic composite horizontal well bottom water plugging technique |
| CN102587873A (en) * | 2011-12-01 | 2012-07-18 | 中国石油天然气股份有限公司 | Carbon oxide huff-n-puff, water control and oil increment method for horizontal well |
| CN102926701A (en) * | 2012-10-31 | 2013-02-13 | 中国石油集团川庆钻探工程有限公司 | Continuous mixing type water plugging technique |
| CN104121000A (en) * | 2014-07-11 | 2014-10-29 | 中国石油集团川庆钻探工程有限公司工程技术研究院 | Low-permeability fractured reservoir cased hole completion horizontal well water plugging method |
| CN104629698A (en) * | 2015-01-19 | 2015-05-20 | 中国石油天然气股份有限公司 | Water plugging agent and water plugging method of thick oil buried hill edge-bottom water reservoir |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106589257A (en) * | 2016-12-09 | 2017-04-26 | 孙安顺 | Preparation method of lignin grafted and copolymerized polymer flocculation type profile modifying/water plugging agent |
| CN106639977A (en) * | 2016-12-12 | 2017-05-10 | 张会利 | Selective water plugging method of oil well in oil extraction process |
| CN106639977B (en) * | 2016-12-12 | 2019-04-02 | 张会利 | A kind of selective water plugging method of oil well in oil recovery process |
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