CN105332672A - Multi-element composite water-control oil-enhancement method for extracting oil - Google Patents
Multi-element composite water-control oil-enhancement method for extracting oil Download PDFInfo
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- CN105332672A CN105332672A CN201510788735.XA CN201510788735A CN105332672A CN 105332672 A CN105332672 A CN 105332672A CN 201510788735 A CN201510788735 A CN 201510788735A CN 105332672 A CN105332672 A CN 105332672A
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Abstract
The invention relates to the field of technologies for extracting oil from high-turn steam-stimulated wells, in particular to a multi-element composite water-control oil-enhancement method for extracting oil. The multi-element composite water-control oil-enhancement method includes steps of firstly, injecting 0.15-0.3 PV of nitrogen into shafts at the nitrogen injection speeds of 1.5*10<4>-3*10<4> m<3>/d, enabling the nitrogen to force water in the shafts to flow towards the bottoms of the shafts, reducing the edge and bottom water coning speeds and enabling the nitrogen to displace bottom water to flow into water outlet passages to form nitrogen cavities; secondly, injecting water-base plugging agents with the mass percent concentration of 0.5%-1% into the shafts at the water-base plugging agent injection speeds of 15-30 m<3>/h. The multi-element composite water-control oil-enhancement method has the advantages that diversified injectants are effectively combined with one another to be injected into target strata, accordingly, steam channeling passages can be effectively plugged, steam absorption profiles can be adjusted, stratum pressures can be increased, the viscosity of crude oil can be reduced, the flowability of the crude oil can be improved, development effects of high-turn stimulated wells can be ultimately enhanced, and recovery ratios of the high-turn stimulated wells can be increased.
Description
Technical field:
The present invention relates to high round steam-stimulated well oil recovery technique field, particularly a kind of multiple elements design water-control oil-increasing oil production method.
Background technology:
Along with thin oil production decline, 21st century the status of heavy oil development become increasingly conspicuous, its exploitation status will occupy an leading position in the long period.Compared with thin oil, the more difficult exploitation of viscous crude, investment cost and development cost are also higher.The agent technology of current Chinese heavy oil development is still steam soak.
But along with the increase of steam soak round, there is following problem in well of handling up: steam entry profile is uneven, and the steam of the injection height that enters oozes passage more, effectively cannot heat the high Middle-Low Permeability Reservoirs of remaining oil abundance; Near wellbore zone is in debt serious, and edge-bottom water is invaded, and causes oil well High water cut; Light composition in viscous crude is plucked out of, and crude oil becomes thicker, and mobility is poorer, oil pumper card.Above many reasons causes high round to be handled up, and well steam injection is of poor quality, well yield is low, oil pump running efficiency is low, gas oil ratio is low, finally affects Development Response of Oilfield.
Summary of the invention:
The technical problem to be solved in the present invention is to provide a kind of multiple elements design water-control oil-increasing oil production method, the method achieve and effectively combine injection target zone by multiple injectant, effective shutoff vapour alters passage, adjustment steam entry profile, improve strata pressure, reduce viscosity of crude, improve crude oil fluidity, final improve high round and to handle up the development effectiveness of well and recovery ratio.Overcome existing high round well steam entry profile of handling up uneven, formation depletion is serious, and viscosity of crude is high, the deficiency that recovery ratio is low.
The technical solution used in the present invention is: a kind of multiple elements design water-control oil-increasing oil production method, and the method step is as follows: the nitrogen first injecting 0.15 ~ 0.3PV, and nitrogen injection rate is 1.5 × 104 ~ 3 × 104m
3between/d, nitrogen forces water in pit shaft to flows, slows down edge and basal water speed, and nitrogen is displaced Di Shui and entered exhalant canal and form nitrogen air cavity; Then implantation quality percent concentration is the water base plugging agent of 0.5% ~ 1%, and water base plugging agent injection rate is 15 ~ 30m
3/ h, water base plugging agent shutoff nitrogen air cavity, extends the action time of nitrogen setting-out cone, the exhalant canal of shutoff simultaneously; Then inject compound plugging agent, the further shutoff exhalant canal of compound plugging agent, compound plugging agent seals water base plugging agent simultaneously; Compound plugging agent Hou Ning 24 hours, after then injecting liquid carbon dioxide, stewing well, makes liquid carbon dioxide fully be dissolved in crude oil, reduces viscosity of crude, improves crude oil flow performance; Finally inject steam, stewing well back production.
The invention has the beneficial effects as follows: the present invention effectively combines injection target zone by multiple injectant, effective shutoff vapour alters passage, adjustment steam entry profile, improve strata pressure, reduce viscosity of crude, improve crude oil fluidity, final improve high round and to handle up the development effectiveness of well and recovery ratio.
Accompanying drawing illustrates:
Below in conjunction with the drawings and specific embodiments, the present invention will be further described in detail.
Fig. 1 is the schematic diagram of nitrogen injection.
Fig. 2 is the schematic diagram injecting water base plugging agent.
Fig. 3 is the schematic diagram injecting compound plugging agent.
Fig. 4 is the schematic diagram injecting liquid carbon dioxide.
Fig. 5 is the schematic diagram injecting steam.
Detailed description of the invention:
As shown in Figure 1, Figure 2, shown in Fig. 3, Fig. 4, Fig. 5, a kind of multiple elements design water-control oil-increasing oil production method, the method step is as follows: the nitrogen 1 first injecting 0.15 ~ 0.3PV, and nitrogen 1 injection rate is 1.5 × 104 ~ 3 × 104m
3between/d, nitrogen 1 forces water in pit shaft to flows, slows down edge and basal water speed, and nitrogen 1 is displaced Di Shui and entered exhalant canal 2 and form nitrogen air cavity 4; Then implantation quality percent concentration is the water base plugging agent 3 of 0.5% ~ 1%, and water base plugging agent 3 injection rate is 15 ~ 30m
3/ h, water base plugging agent 3 shutoff nitrogen air cavity 4, extends the action time of nitrogen 1 setting-out cone, the exhalant canal of shutoff simultaneously 2; Then inject compound plugging agent 5, compound plugging agent 5 is shutoff exhalant canal 2 further, and compound plugging agent 5 seals water base plugging agent 3 simultaneously; Compound plugging agent 5 Hou Ning 24 hours, after then injecting liquid carbon dioxide 6, stewing well, makes liquid carbon dioxide 6 fully be dissolved in crude oil, reduces viscosity of crude, improves crude oil flow performance; Finally inject steam 7, stewing well back production.
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 (1)
1. a multiple elements design water-control oil-increasing oil production method, is characterized in that: the method step is as follows: the nitrogen (1) first injecting 0.15 ~ 0.3PV, nitrogen (1) injection rate is 1.5 × 104 ~ 3 × 104m
3between/d, nitrogen (1) forces water in pit shaft to flows, slows down edge and basal water speed, and nitrogen (1) is displaced Di Shui and entered exhalant canal (2) and form nitrogen air cavity (4); Then implantation quality percent concentration is the water base plugging agent (3) of 0.5% ~ 1%, and water base plugging agent (3) injection rate is 15 ~ 30m
3/ h, water base plugging agent (3) shutoff nitrogen air cavity (4), extends the action time of nitrogen (1) setting-out cone, shutoff exhalant canal simultaneously (2); Then inject compound plugging agent (5), compound plugging agent (5) is shutoff exhalant canal (2) further, and compound plugging agent (5) seals water base plugging agent (3) simultaneously; Compound plugging agent (5) Hou Ning 24 hours, then injects liquid carbon dioxide (6) stewing well afterwards, liquid carbon dioxide (6) is fully dissolved in crude oil, reduces viscosity of crude, improve crude oil flow performance; Finally inject steam (7), stewing well back production.
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| CN201510788735.XA CN105332672A (en) | 2015-11-17 | 2015-11-17 | Multi-element composite water-control oil-enhancement method for extracting oil |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105863581A (en) * | 2016-05-11 | 2016-08-17 | 中国石油天然气股份有限公司 | Oil extraction method for controlling water and increasing oil of high-water-content oil well of buried hill oil reservoir |
| CN109538175A (en) * | 2017-09-22 | 2019-03-29 | 中国石油化工股份有限公司 | The resident method sealed up for safekeeping of LOW PERMEABILITY RESERVOIR water slug auxiliary nitrogen soak |
| CN110630234A (en) * | 2018-06-21 | 2019-12-31 | 中国石油天然气股份有限公司 | Steam injection method for heavy oil thermal recovery well |
| CN111577224A (en) * | 2019-02-19 | 2020-08-25 | 中国石油化工股份有限公司 | Method for improving bottom water gas reservoir recovery ratio by controlling water with carbon dioxide in horizontal well |
| CN112145140A (en) * | 2019-06-28 | 2020-12-29 | 中国石油化工股份有限公司 | Gas injection method in thermal recovery process |
| CN114427428A (en) * | 2020-10-14 | 2022-05-03 | 中国石油化工股份有限公司 | Method for improving recovery ratio by controlling water under stable pressure in bottom water heavy oil reservoir |
| CN115478818A (en) * | 2021-05-31 | 2022-12-16 | 中国石油化工股份有限公司 | CO (carbon monoxide) 2 And N 2 Method for improving recovery ratio by composite huff and puff |
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| US20070068674A1 (en) * | 2005-09-23 | 2007-03-29 | Alberta Research Council, Inc. | Toe-To-Heel Waterflooding With Progressive Blockage Of The Toe Region |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105863581A (en) * | 2016-05-11 | 2016-08-17 | 中国石油天然气股份有限公司 | Oil extraction method for controlling water and increasing oil of high-water-content oil well of buried hill oil reservoir |
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| CN109538175B (en) * | 2017-09-22 | 2021-06-01 | 中国石油化工股份有限公司 | Method for assisting nitrogen gas huff-puff resident sealing storage of low-permeability reservoir water slug |
| CN110630234A (en) * | 2018-06-21 | 2019-12-31 | 中国石油天然气股份有限公司 | Steam injection method for heavy oil thermal recovery well |
| CN110630234B (en) * | 2018-06-21 | 2021-11-02 | 中国石油天然气股份有限公司 | Steam injection method for heavy oil thermal recovery well |
| CN111577224A (en) * | 2019-02-19 | 2020-08-25 | 中国石油化工股份有限公司 | Method for improving bottom water gas reservoir recovery ratio by controlling water with carbon dioxide in horizontal well |
| CN111577224B (en) * | 2019-02-19 | 2022-07-08 | 中国石油化工股份有限公司 | Method for improving bottom water gas reservoir recovery ratio by controlling water with carbon dioxide in horizontal well |
| CN112145140A (en) * | 2019-06-28 | 2020-12-29 | 中国石油化工股份有限公司 | Gas injection method in thermal recovery process |
| CN112145140B (en) * | 2019-06-28 | 2022-12-02 | 中国石油化工股份有限公司 | Gas injection method for thermal recovery process |
| CN114427428A (en) * | 2020-10-14 | 2022-05-03 | 中国石油化工股份有限公司 | Method for improving recovery ratio by controlling water under stable pressure in bottom water heavy oil reservoir |
| CN115478818A (en) * | 2021-05-31 | 2022-12-16 | 中国石油化工股份有限公司 | CO (carbon monoxide) 2 And N 2 Method for improving recovery ratio by composite huff and puff |
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Application publication date: 20160217 |
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