CN102943654A - Method for improving recovery efficiency of high-hydrocarbon-content gas deposit by high-CO2-content gas deposit - Google Patents
Method for improving recovery efficiency of high-hydrocarbon-content gas deposit by high-CO2-content gas deposit Download PDFInfo
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- CN102943654A CN102943654A CN201210429546XA CN201210429546A CN102943654A CN 102943654 A CN102943654 A CN 102943654A CN 201210429546X A CN201210429546X A CN 201210429546XA CN 201210429546 A CN201210429546 A CN 201210429546A CN 102943654 A CN102943654 A CN 102943654A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P90/00—Enabling technologies with a potential contribution to greenhouse gas [GHG] emissions mitigation
- Y02P90/70—Combining sequestration of CO2 and exploitation of hydrocarbons by injecting CO2 or carbonated water in oil wells
Abstract
The invention discloses a method for improving the recovery efficiency of a high-hydrocarbon-content gas deposit by a high-CO2-content gas deposit, natural gas in the high-CO2-content gas deposit is transported to a developed high-hydrocarbon-content gas deposit by building an artificial natural gas transportation channel between the high-CO2-content gas deposit and the developed high-hydrocarbon-content gas deposit and fully utilizing the stratum energy of the high-CO2-content gas deposit, so as to implement 'CO2 gas drive' to improve the recovery efficiency of natural gas of the developed high-hydrocarbon-content gas deposit. According to the method, an existing production platform or underwater production system is fully utilized to shorten the development period and reduce the investment cost. In addition, the CO2 removal cost is further lowered, the high-CO2-content natural gas is transported to the developed high-hydrocarbon-content gas deposit through the artificial transportation channel without being limited by the number of the production platforms or underwater wellheads; when the method is adopted to implement 'CO2 gas drive', the stratum energy of the high-CO2-content gas deposit is fully used for improving the stratum pressure of the high- hydrocarbon-content gas deposit and the recovery efficiency of the natural gas of the high- hydrocarbon-content gas deposit.
Description
Technical field
The present invention relates to a kind of method of the construction of natural gas fields, specifically a kind of method that improves the high hydrocarbon-containing gas deposit recovery efficiency.
Background technology
High containing CO
2gas reservoir refers to CO in natural gas
2the gas reservoir of content ﹥ 50%.High containing CO at present
2the CO produced in the gas reservoir development manufacturing process
2the processing mode of emptying after mainly taking decarburization to separate, not only cost height but also fail to take full advantage of, therefore caused some high containing CO
2the gas pool reserve development degree low or be difficult to develop.And general high hydrocarbon-containing gas reservoir is developed as the master with the exhaustion formula, the Main Means that improves its gas recovery factor is to reduce well head pressure by increasing large-scale compressor; Due to the large-scale compression speculative investment and operation cost high, and offshore gas field exploitation also needs to enlarge existing production platform area or newly-built production platform so that large-scale compressor to be installed, cost can be higher, makes the economic recovery of the high hydrocarbon-containing gas reservoir of generally having developed on the low side.Therefore, need a kind of utilization of research high containing CO
2gas reservoir improves the method for the high hydrocarbon-containing gas deposit recovery efficiency of having developed.
As shown in Figure 1, contain CO for height at present
2the development approach of gas reservoir 1 is identical with the normal gas pools development approach, is mainly production platform 8 or bore producing well 7 from subsea production system and directly open high containing CO at sea
2gas reservoir 1 is high containing CO
2natural gas, from producing well 7 extraction, takes off CO by ground installation
2process.Because height contains CO
2cO in the natural gas of gas reservoir 1 output
2content is high, so the development well requirement for anticorrosion is higher, correspondingly also can increase the investment of the relevant tubing of development well and production facility, simultaneously de-CO
2cost is also higher; The high hydrocarbon-containing gas reservoir 4 of having developed is developed as the master with the exhaustion formula, and its exploitation middle and later periods is mainly to reduce well head pressure and improve recovery ratio by increasing large-scale compressor, but large-scale compressor takes up room greatly, and construction investment and operation cost are high.There is following shortcoming in existing development approach:
1) high containing CO
2gas reservoir development brill completion and Development and Production requirement for anticorrosion are high, and brill completion and production facility investment cost are higher, simultaneously natural qi exhaustion CO
2cost is also higher;
2) can not utilize the high CO of containing
2the stratum energy of gas reservoir improves the recovery ratio of the high hydrocarbon-containing gas reservoir of having developed;
3) by increasing large-scale compressor, to reduce the well head pressure cost high, makes the high hydrocarbon-containing gas reservoir economic recovery developed on the low side.
Summary of the invention
In order to overcome above-mentioned deficiency, the object of the invention is to provide a kind of utilization high containing CO
2gas reservoir improves the method for high hydrocarbon-containing gas deposit recovery efficiency, and the method is by containing CO at height
2set up the artificial natural gas migration pathway between gas reservoir and the high hydrocarbon-containing gas reservoir developed, and take full advantage of high containing CO
2the stratum energy of gas reservoir, contain CO by height
2gas migration in gas reservoir, to the high hydrocarbon-containing gas reservoir of having developed, is realized " CO
2gas drive ", can improve the gas recovery factor of the high hydrocarbon-containing gas reservoir of having developed.
To achieve these goals, the technical solution used in the present invention is as follows:
Utilize high containing CO
2gas reservoir improves the method for high hydrocarbon-containing gas deposit recovery efficiency, and its feature comprises the following steps:
A, at sea developed in gas field and to have selected the sandstone reservoir physical property to belong to middle and high infiltration to be permeability ﹥ 10mD and the high hydrocarbon-containing gas reservoir that distributes the exploitation of exhaustion formula more stable, to select to be applicable to the selected height to be developed of development approach of the present invention containing CO simultaneously around the high hydrocarbon-containing gas reservoir of having developed
2gas reservoir;
B, the selected height to be developed of basis contain CO
2the spatial relationship of gas reservoir and the high hydrocarbon-containing gas reservoir developed, at suitable ground location drill ship in place, to ocean floor drilling, form the construction well;
C, in the construction well, carry out drilling well, and drill selected height to be developed containing CO
2gas reservoir and the high hydrocarbon-containing Gas Reservoir sand body of having developed make between the two to form bore hole;
D, the selected height to be developed of basis contain CO
2the reservoir properties feature selecting of gas reservoir and the high hydrocarbon-containing gas reservoir developed is determined the sand control completion mode of two gas reservoir well sections, and by selected completion mode, two gas reservoir well sections is carried out to sand control completion;
After E, sand control completion on two gas reservoir well sections or before beat bridging plug and carry out packing, between two gas reservoirs, set up the artificial natural gas migration pathway high containing CO to utilize
2the gas reservoir natural gas drive, for the high hydrocarbon-containing gas reservoir development of having developed, is discarded the well section on construction well bridging plug simultaneously;
F, high containing CO
2height in gas reservoir is containing CO
2natural gas by above-mentioned artificial natural gas migration pathway, flows to the high hydrocarbon-containing gas reservoir of having developed under the effect of pressure reduction, is high hydrocarbon-containing gas reservoir makeup energy;
The larger height of proportion of G, inflow high hydrocarbon-containing gas reservoir contains CO
2natural gas drive, for high hydrocarbon-containing gas reservoir natural gas, makes more high hydrocarbon-containing natural gas flow have the producing pattern of production platform or subsea production system to sea, and high containing CO
2natural gas is stayed in the high hydrocarbon-containing gas reservoir mostly, thereby realizes the displacement exploitation of the high hydrocarbon-containing gas reservoir to having developed.
After described step D completes, the working solution in two gas reservoir well sections can be discharged.
In described step e, before the well section on discarded construction well bridging plug, can utilize a plurality of Multilateral Wells of construction well sidetracking, and it is high containing CO to utilize to set up a plurality of new artificial natural gas migration pathways with reference to above-mentioned steps C to E by a plurality of Multilateral Wells
2the gas reservoir natural gas drive, for the high hydrocarbon-containing gas reservoir development of having developed, is finally discarded the well section on each Multilateral Wells bridging plug.
It is in place that drill ship can move on to new correct position in case of necessity, sets up new artificial natural gas migration pathway by above-mentioned steps B to E high containing CO to utilize
2the gas reservoir natural gas drive is for the high hydrocarbon-containing gas reservoir development of having developed.
Beneficial effect of the present invention: the present invention has widened the method for construction of natural gas fields raising recovery ratio, has reduced development cost and CO
2discharge value, and improved the recovery ratio of the high hydrocarbon-containing gas reservoir of having developed.Its beneficial effect is embodied in following several respects:
1) reduce CO in the output natural gas of gas field
2content, reduce de-CO
2cost;
2) high containing CO
2the natural gas of gas reservoir to the high hydrocarbon-containing gas reservoir of having developed, can not be subject to the restriction of platform space or subsea production system underwater well head quantity, and cost is lower by artificial migration pathway migration;
3) adopt the method to realize " CO
2gas drive ", can take full advantage of high containing CO
2the stratum energy of gas reservoir, the strata pressure of the high hydrocarbon-containing gas reservoir that raising has been developed, the gas recovery factor of the high hydrocarbon-containing gas reservoir that raising has been developed, economic benefits.
The accompanying drawing explanation
Below in conjunction with accompanying drawing, the present invention is described in further detail.
Fig. 1 is for existing high containing CO
2the structural representation of gas reservoir development method;
Fig. 2 is the structural representation that the present invention develops.
In figure: 1, selected height to be developed is containing CO
2gas reservoir; 2, artificial natural gas migration pathway; 3, bridging plug; 4, the high hydrocarbon-containing gas reservoir of having developed; 5, construction well; 6, Multilateral Wells; 7, producing well; 8, production platform; 9, drill ship; 10, sea; 11, bore hole.
The specific embodiment
As shown in Figure 2, utilize the high CO of containing
2gas reservoir improves the method for high hydrocarbon-containing gas deposit recovery efficiency, comprises the following steps:
1) the suitable stage of gas field development at sea, from developing in gas field, select the sandstone reservoir physical property to belong to the high hydrocarbon-containing gas reservoir 4 that middle and high infiltration is the more stable exhaustion formula exploitation of permeability ﹥ 10mD and distribution, around the high hydrocarbon-containing gas reservoir of having developed, select the selected height to be developed of applicable development approach of the present invention containing CO simultaneously
2 gas reservoir 1;
2) contain CO according to selected height to be developed
2the spatial relationship of gas reservoir 1 and the high hydrocarbon-containing gas reservoir 4 developed, at suitable ground location drill ship 9 in place, to ocean floor drilling, form construction well 5;
3) in construction well 5, carry out drilling well, and drill selected height to be developed containing CO
2gas reservoir 1 and high hydrocarbon-containing gas reservoir 4 sandstone reservoirs of having developed make between the two to form bore hole 11;
4) contain CO according to selected height to be developed
2the reservoir properties feature selecting of gas reservoir 1 and the high hydrocarbon-containing gas reservoir 4 developed is determined the sand control completion mode of two gas reservoir well sections, and by selected completion mode, two gas reservoir well sections are carried out to sand control completion, after sand control completion, the working solution in two gas reservoir well sections can be discharged in case of necessity;
5) after sand control completion on two gas reservoir well sections or before beat bridging plug 3 and carry out packing, between two gas reservoirs, set up artificial natural gas migration pathway 2 high containing CO to utilize
2 gas reservoir 1 natural gas drive, for high hydrocarbon-containing gas reservoir 4 exploitations of having developed, is discarded the well section on construction well 5 bridging plugs 3 simultaneously;
6), in described step 5), before the well section on discarded construction well 5 bridging plugs 3, can utilize a plurality of Multilateral Wells 6 of construction well 5 sidetracking, and with reference to above-mentioned steps 3) to 5) a plurality of new artificial natural gas migration pathways 2 set up to utilize the high CO of containing by a plurality of Multilateral Wells 6
2 gas reservoir 1 natural gas drive is for high hydrocarbon-containing gas reservoir 4 exploitations of having developed, finally the well section on discarded each Multilateral Wells 6 bridging plugs 3;
7), high containing CO
2height in gas reservoir 1 is containing CO
2natural gas by above-mentioned artificial natural gas migration pathway 2, flows to the high hydrocarbon-containing gas reservoir 4 of having developed under the effect of pressure reduction, is high hydrocarbon-containing gas reservoir 4 makeup energy;
8) height that the proportion of inflow high hydrocarbon-containing gas reservoir 4 is larger is containing CO
2natural gas drive, for the high hydrocarbon-containing natural gas, makes more high hydrocarbon-containing natural gas flow have the producing pattern of production platform 8 or subsea production system to sea, and high containing CO
2natural gas is stayed in high hydrocarbon-containing gas reservoir 4 mostly;
9) the high hydrocarbon-containing natural gas flows out from existing producing pattern 7, enters existing surface production platform 8 or subsea production system, thereby realizes utilizing high containing CO
2high hydrocarbon-containing gas reservoir 4 exploitations that gas reservoir 1 displacement has been developed, and the recovery ratio of raising high hydrocarbon-containing gas reservoir 4.
The above is the preferred embodiment of the present invention, certainly can not limit with this interest field of the present invention.It should be pointed out that for those skilled in the art, technical scheme of the present invention is modified or is equal to replacement, do not break away from protection scope of the present invention.
Claims (5)
1. one kind is utilized high containing CO
2gas reservoir improves the method for high hydrocarbon-containing gas deposit recovery efficiency, and its feature comprises the following steps:
A. at sea developed in gas field and selected the sandstone reservoir physical property to belong to the high hydrocarbon-containing gas reservoir that middle and high infiltration is the more stable exhaustion formula exploitation of permeability ﹥ 10mD and distribution, around the high hydrocarbon-containing gas reservoir of having developed, selected the selected height to be developed of applicable development approach of the present invention containing CO simultaneously
2gas reservoir;
B. contain CO according to selected height to be developed
2the spatial relationship of gas reservoir and the high hydrocarbon-containing gas reservoir developed, at suitable ground location drill ship in place, to ocean floor drilling, form the construction well;
C. in the construction well, carry out drilling well, and drill selected height to be developed containing CO
2gas reservoir and the high hydrocarbon-containing Gas Reservoir sand body of having developed make between the two to form bore hole;
D. contain CO according to selected height to be developed
2the reservoir properties feature selecting of gas reservoir and the high hydrocarbon-containing gas reservoir developed is determined the sand control completion mode of two gas reservoir well sections, and by selected completion mode, two gas reservoir well sections is carried out to sand control completion;
E. after sand control completion on two gas reservoir well sections or before beat bridging plug and carry out packing, between two gas reservoirs, set up the artificial natural gas migration pathway high containing CO to utilize
2the gas reservoir natural gas drive, for the high hydrocarbon-containing gas reservoir development of having developed, is discarded the well section on construction well bridging plug simultaneously;
F. high containing CO
2height in gas reservoir is containing CO
2natural gas by above-mentioned artificial natural gas migration pathway, flows to the high hydrocarbon-containing gas reservoir of having developed under the effect of pressure reduction, is high hydrocarbon-containing gas reservoir makeup energy;
G. the larger height of proportion that flows into the high hydrocarbon-containing gas reservoir contains CO
2natural gas drive, for high hydrocarbon-containing gas reservoir natural gas, makes more high hydrocarbon-containing natural gas flow have the producing pattern of production platform or subsea production system to sea, and high containing CO
2natural gas is stayed in the high hydrocarbon-containing gas reservoir mostly, thereby realizes the displacement exploitation of the high hydrocarbon-containing gas reservoir to having developed.
2. a kind of utilization according to claim 1 is high containing CO
2gas reservoir improves the method for high hydrocarbon-containing gas deposit recovery efficiency, it is characterized in that: described height is containing CO
2gas reservoir refers to CO in natural gas
2the gas reservoir of content ﹥ 50%.
3. a kind of utilization according to claim 1 is high containing CO
2gas reservoir improves the method for high hydrocarbon-containing gas deposit recovery efficiency, it is characterized in that: after described step D completes, the working solution in two gas reservoir well sections can be discharged.
4. a kind of utilization according to claim 1 is high containing CO
2gas reservoir improves the method for high hydrocarbon-containing gas deposit recovery efficiency, it is characterized in that: in described step e, before well section on discarded construction well bridging plug, can utilize a plurality of Multilateral Wells of construction well sidetracking, and it is high containing CO to utilize to set up a plurality of new artificial natural gas migration pathways with reference to above-mentioned steps C to E by a plurality of Multilateral Wells
2the gas reservoir natural gas drive, for the high hydrocarbon-containing gas reservoir development of having developed, is finally discarded the well section on each Multilateral Wells bridging plug.
5. a kind of utilization according to claim 1 is high containing CO
2gas reservoir improves the method for high hydrocarbon-containing gas deposit recovery efficiency, and it is characterized in that: it is in place that drill ship can move on to new correct position, sets up new artificial natural gas migration pathway by above-mentioned steps B to E high containing CO to utilize
2the gas reservoir natural gas drive is for the high hydrocarbon-containing gas reservoir development of having developed.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210429546XA CN102943654A (en) | 2012-11-01 | 2012-11-01 | Method for improving recovery efficiency of high-hydrocarbon-content gas deposit by high-CO2-content gas deposit |
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| CN201210429546XA CN102943654A (en) | 2012-11-01 | 2012-11-01 | Method for improving recovery efficiency of high-hydrocarbon-content gas deposit by high-CO2-content gas deposit |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107621350A (en) * | 2016-07-15 | 2018-01-23 | 中国石油化工股份有限公司 | One kind simulation supercritical CO2The method of displacement natural gas flow |
| CN108487883A (en) * | 2017-10-12 | 2018-09-04 | 天翊科技有限公司 | A kind of technique using natural gas and the carbon dioxide mix displacement of reservoir oil |
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| CN1238824A (en) * | 1996-11-27 | 1999-12-15 | 挪威国家石油公司 | System, vessel, seabed installation and method for producing oil or gas |
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| CN2818771Y (en) * | 2005-05-27 | 2006-09-20 | 中国石化集团胜利石油管理局钻井工艺研究院 | Petroleum production safeguarding system under water |
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2012
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Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0435727A1 (en) * | 1989-12-29 | 1991-07-03 | Institut Français du Pétrole | Method and device for stimulation of an underground formation by injection of a fluid coming from an adjacent zone being connected to the first one by a drain hole transversing a low-permeable intermediate layer |
| CN1143992A (en) * | 1994-03-10 | 1997-02-26 | 国际壳牌研究有限公司 | Method of producing fluid from earth formation |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107621350A (en) * | 2016-07-15 | 2018-01-23 | 中国石油化工股份有限公司 | One kind simulation supercritical CO2The method of displacement natural gas flow |
| CN107621350B (en) * | 2016-07-15 | 2019-11-05 | 中国石油化工股份有限公司 | A kind of simulation supercritical CO2The method of displacement natural gas flow |
| CN108487883A (en) * | 2017-10-12 | 2018-09-04 | 天翊科技有限公司 | A kind of technique using natural gas and the carbon dioxide mix displacement of reservoir oil |
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Application publication date: 20130227 |