CN102926719A - Method for exploiting abnormally high-pressure gas deposit - Google Patents
Method for exploiting abnormally high-pressure gas deposit Download PDFInfo
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- CN102926719A CN102926719A CN2012104295050A CN201210429505A CN102926719A CN 102926719 A CN102926719 A CN 102926719A CN 2012104295050 A CN2012104295050 A CN 2012104295050A CN 201210429505 A CN201210429505 A CN 201210429505A CN 102926719 A CN102926719 A CN 102926719A
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- 238000000034 method Methods 0.000 title claims abstract description 13
- 239000007789 gas Substances 0.000 claims abstract description 123
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims abstract description 76
- 238000004519 manufacturing process Methods 0.000 claims abstract description 68
- 239000003345 natural gas Substances 0.000 claims abstract description 38
- 230000005012 migration Effects 0.000 claims abstract description 17
- 238000013508 migration Methods 0.000 claims abstract description 17
- 230000037361 pathway Effects 0.000 claims abstract description 17
- 238000005553 drilling Methods 0.000 claims abstract description 9
- 230000002159 abnormal effect Effects 0.000 claims description 66
- 238000011161 development Methods 0.000 claims description 23
- 238000013459 approach Methods 0.000 claims description 16
- 238000010276 construction Methods 0.000 claims description 15
- 239000004576 sand Substances 0.000 claims description 13
- 230000000694 effects Effects 0.000 claims description 4
- 230000009467 reduction Effects 0.000 claims description 4
- 238000012856 packing Methods 0.000 claims description 3
- 239000012224 working solution Substances 0.000 claims description 3
- 230000002706 hydrostatic effect Effects 0.000 claims description 2
- 230000008569 process Effects 0.000 abstract description 2
- 241001074085 Scophthalmus aquosus Species 0.000 description 5
- 230000008901 benefit Effects 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000000605 extraction Methods 0.000 description 2
- 206010020852 Hypertonia Diseases 0.000 description 1
- 230000035508 accumulation Effects 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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Abstract
The invention discloses a method for exploiting abnormally high-pressure gas deposits. The method ensures that a natural gas contained in the selected abnormally high-pressure gas deposits to be exploited flows to exploited production gas deposits with lower strata pressure through a natural gas migration pathway under the action of pressure difference by building the artificial natural gas migration pathway by drilling on an appropriate ground position, the flowed abnormally high-pressure gas deposits and a relatively low-pressure natural gas contained in the exploited production gas deposits with lower strata pressure are mixed, lowered in pressure and together flow into a production well, and the natural gas flows out of the production well, so that the exploitation of the abnormally high-pressure gas deposits is realized through the traditional production platform or underwater production system. According to the invention, the work process of drilling and completion operation and the completion pipe string structure are simplified, the operation difficulty and the workload are reduced, and the cost is greatly lowered; and besides, high-pressure gas deposit exploitation is transmitted into general normal-pressure gas deposit exploitation, therefore the annular under-pressure risk in the production process can be prevented and the safety production is ensured.
Description
Technical field
The present invention relates to a kind of method of the construction of natural gas fields, specifically a kind of development approach of Abnormal High Pressure Gas Reservoirs.
Background technology
Abnormal High Pressure Gas Reservoirs refers to that gas reservoir pressure is higher than hydrostatic pressure, and pressure coefficient is greater than 1.2 gas reservoir.Because of the Abnormal High Pressure Gas Reservoirs pressure coefficient high, part gas reservoir pressure coefficient even reach more than 2.0, for the security development Abnormal High Pressure Gas Reservoirs, the producing well of existing exploitation method need adopt many sleeve pipes sequence, high material tubing and gas recovery facility, well head and ground installation safe class also need greatly to improve, the individual well investment is about 3 times of conventional well, has increased considerably development investment, so that part abnormal pressure natural gas resource is difficult to economic producing.
As shown in Figure 1, at present identical with the normal gas pools development approach for the development approach of Abnormal High Pressure Gas Reservoirs 1, mainly be on ground or offshore production platform 8 or from subsea production system brill producing well 7, directly to open gas reservoir, make the natural gas of Abnormal High Pressure Gas Reservoirs 1 under the effect of pressure reduction, flow to producing well 7 pit shafts and directly extraction of quilt.There is following shortcoming in existing development approach:
1) all need brill completion material and the well head facility of the high material of a cover from production platform or subsea production system every brill a bite directional well or extended reach well, bore the completion cost high, the individual well investment is about 3 times of conventional well.
2) exploitation of marine Abnormal High Pressure Gas Reservoirs need rely on or newly-built production platform or subsea production system, when the gas accumulations distribution area is large, need build a plurality of production platforms or subsea production system, production platform or subsea production system investment are very expensive, and each production platform or subsea production system can with well slot or underwater well head number and can to control the gas reservoir scope be limited, for increasing well slot or underwater well head number or enlarging the newly-built production platform of gas reservoir control range or subsea production system will cause development investment sharply to rise.
3) can not take full advantage of and developed gas field production platform or subsea production system, waste greatly the facility resource, and new production platform or subsea production system are long from being built into production cycle.
4) because the Abnormal High Pressure Gas Reservoirs pressure coefficient is high, ubiquity casing annulus hypertonia causes controlling difficulty large in the manufacturing process, has production safety hidden danger.
Summary of the invention
In order to overcome above-mentioned deficiency, the object of the invention is to provide a kind of development approach of Abnormal High Pressure Gas Reservoirs.The method by in suitable ground location drilling well between the lower production gas reservoir of selected Abnormal High Pressure Gas Reservoirs to be developed and the strata pressure developed, to set up the artificial natural gas migration pathway with the exploitation Abnormal High Pressure Gas Reservoirs, the PRESSURE GAS RESERVOIR exploitation is converted into general normal pressure gas reservoir development, both simplify development well and bored completion practice working programme and completion tubular column structure, task difficulty and workload have been reduced, decrease cost, can evade again annular space risk with pressure in the manufacturing process, ensure safety in production.
To achieve these goals, the technical solution used in the present invention is as follows:
A kind of development approach of Abnormal High Pressure Gas Reservoirs comprises the following steps:
1. according to the spatial relationship of the lower production gas reservoir of selected Abnormal High Pressure Gas Reservoirs to be developed and the strata pressure developed, at suitable ground location drill ship in place, to ocean floor drilling, form the well of constructing;
2. in the construction well, carry out drilling well, and drill selected Abnormal High Pressure Gas Reservoirs to be developed and the lower production Gas Reservoir sand body of strata pressure developed makes and forms bore hole between the two;
3. determine the sand control completion mode of two gas reservoir well sections according to the reservoir properties feature selecting of the lower production gas reservoir of selected Abnormal High Pressure Gas Reservoirs to be developed and the strata pressure developed, and by the completion mode of selecting two gas reservoir well sections are carried out sand control completion;
4. behind sand control completion, the working solution in the two gas reservoir well sections can be discharged in case of necessity;
5. behind the sand control completion on the two gas reservoir well sections or before beat bridging plug and carry out packing, namely between two gas reservoirs, set up the artificial natural gas migration pathway with the exploitation Abnormal High Pressure Gas Reservoirs, simultaneously the well section on the discarded construction well bridging plug;
6. the natural gas in the Abnormal High Pressure Gas Reservoirs by above-mentioned artificial natural gas migration pathway, flows to the lower production gas reservoir of strata pressure of having developed under the effect of pressure reduction;
7. the interior relatively low pressure natural gas of the production gas reservoir that the abnormal pressure natural gas that flows into and the strata pressure of having developed are lower mixes, step-down, jointly flow to producing well;
8. natural gas flows out from producing pattern, thereby realizes by the exploitation to Abnormal High Pressure Gas Reservoirs of existing production platform or subsea production system.
Described step 5. in, before the well section on the discarded construction well bridging plug, can utilize a plurality of Multilateral Wells of construction well sidetracking, and with reference to above-mentioned steps 2. to 5. setting up a plurality of new artificial natural gas migration pathways with the exploitation Abnormal High Pressure Gas Reservoirs by a plurality of Multilateral Wells, the last well section on discarded each Multilateral Wells bridging plug.
Large or when having another Abnormal High Pressure Gas Reservoirs need adopt the inventive method exploitation when the distribution area of selected Abnormal High Pressure Gas Reservoirs to be developed, drill ship moves on to new correct position, sets up new artificial natural gas migration pathway by above-mentioned steps between the lower production gas reservoir of Abnormal High Pressure Gas Reservoirs and the strata pressure developed.
Beneficial effect of the present invention: owing to adopting above-mentioned development approach, the present invention has widened the method for Abnormal High Pressure Gas Reservoirs exploitation, because greatly having reduced the risk that exists in development cost and the production management, can effectively employ the Abnormal High Pressure Gas Reservoirs that to develop because of reasons such as economy, technology, safety at the lower production gas reservoir periphery of the strata pressure of having developed, improve the use rate of Abnormal High Pressure Gas Reservoirs.Its beneficial effect is embodied in following several respects:
1) directly do not bore producing well at selected Abnormal High Pressure Gas Reservoirs to be developed, and the lower production gas reservoir of strata pressure of the natural gas transport of Abnormal High Pressure Gas Reservoirs extremely having been developed by setting up the artificial natural gas migration pathway, reach the purpose of exploiting after the first step-down, brill completion practice working programme and completion tubular column structure have been simplified, task difficulty and workload have been reduced, decrease brill completion cost, improved the economic benefit of Abnormal High Pressure Gas Reservoirs exploitation.
2) adopt the method exploitation Abnormal High Pressure Gas Reservoirs, can rely on existing production platform or subsea production system to realize building less production platform or subsea production system, greatly reduce construction investment.
3) high-pressure natural gas of Abnormal High Pressure Gas Reservoirs is migrated to the lower production gas reservoir of strata pressure of having developed by the artificial natural gas passage, adopt the lower existing producing pattern extraction of production gas reservoir of strata pressure of having developed, take full advantage of existing utility, realize low cost development.
4) exploit after Abnormal High Pressure Gas Reservoirs is converted into the relatively low pressure gas reservoir, evaded in process of production annular space risk with pressure of Abnormal High Pressure Gas Reservoirs tradition development approach, ensure safety in production.
Description of drawings
The present invention is described in further detail below in conjunction with accompanying drawing.
Fig. 1 is the structural representation of the development approach of existing Abnormal High Pressure Gas Reservoirs;
Fig. 2 is the structural representation that the present invention develops.
Among the figure: 1, selected Abnormal High Pressure Gas Reservoirs to be developed; 2, artificial natural gas migration pathway; 3, bridging plug; 4, the production gas reservoir that the strata pressure of having developed is lower; 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, a kind of development approach of Abnormal High Pressure Gas Reservoirs comprises the following steps:
1. according to the spatial relationship of the lower production gas reservoir 4 of selected Abnormal High Pressure Gas Reservoirs 1 and the strata pressure developed, at 10 positions, suitable ground drill ship 9 in place, to ocean floor drilling, form the well 5 of constructing;
2. in construction well 5, carry out drilling well, and drill selected Abnormal High Pressure Gas Reservoirs to be developed 1 and lower production gas reservoir 4 sandstone reservoirs of strata pressure developed make and form bore hole 11 between the two;
3. determine the sand control completion mode of two gas reservoir well sections according to the reservoir properties feature selecting of the lower production gas reservoir 4 of selected Abnormal High Pressure Gas Reservoirs to be developed 1 and the strata pressure developed, and by the completion mode of selecting two gas reservoir well sections are carried out sand control completion;
4. behind sand control completion, the working solution in the two gas reservoir well sections can be discharged in case of necessity;
5. behind the sand control completion on the two gas reservoir well sections or before beat bridging plug 3 and carry out packing, namely between two gas reservoirs, set up artificial natural gas migration pathway 2 with exploitation Abnormal High Pressure Gas Reservoirs 1, simultaneously the well section on discarded construction well 5 bridging plugs 3;
6. in case of necessity above-mentioned steps 5. in, before the well section on discarded construction well 5 bridging plugs 3, in drill ship 9 non-wiping situations, can utilize a plurality of Multilateral Wells 6 of construction well 5 sidetrackings, and with reference to above-mentioned steps 2. to 5. setting up a plurality of new artificial natural gas migration pathways 2 with exploitation Abnormal High Pressure Gas Reservoirs 1 by a plurality of Multilateral Wells 6, the last well section on discarded each Multilateral Wells 6 bridging plug 3;
7. large when the distribution area of selected Abnormal High Pressure Gas Reservoirs to be developed 1 or when having another Abnormal High Pressure Gas Reservoirs 1 to need to adopt the inventive method exploitation, drill ship 9 moves on to new correct position, sets up new artificial natural gas migration pathway 2 by above-mentioned steps between the lower production gas reservoir 4 of Abnormal High Pressure Gas Reservoirs 1 and the strata pressure developed;
8. the natural gas in the Abnormal High Pressure Gas Reservoirs by above-mentioned artificial natural gas migration pathway, flows to the lower production gas reservoir of strata pressure of having developed under the effect of pressure reduction;
9. the interior relatively low pressure natural gas of the production gas reservoir that the abnormal pressure natural gas that flows into and the strata pressure of having developed are lower mixes, step-down, jointly flow to producing well;
10. natural gas flows out from producing pattern, thereby realizes by the exploitation to Abnormal High Pressure Gas Reservoirs of existing production platform or subsea production system.
The above is preferred embodiment of the present invention, certainly can not limit with this interest field of the present invention.Should be pointed out that for those skilled in the art, technical scheme of the present invention is made amendment or is equal to replacement, do not break away from protection scope of the present invention.
Claims (5)
1. the development approach of an Abnormal High Pressure Gas Reservoirs, its feature comprises the following steps:
1. according to the spatial relationship of the lower production gas reservoir of selected Abnormal High Pressure Gas Reservoirs to be developed and the strata pressure developed, at suitable ground location drill ship in place, to ocean floor drilling, form the well of constructing;
2. in the construction well, carry out drilling well, and drill selected Abnormal High Pressure Gas Reservoirs to be developed and the lower production Gas Reservoir sand body of strata pressure developed makes and forms bore hole between the two;
3. determine the sand control completion mode of two gas reservoir well sections according to the reservoir properties feature selecting of the lower production gas reservoir of selected Abnormal High Pressure Gas Reservoirs to be developed and the strata pressure developed, and by the completion mode of selecting two gas reservoir well sections are carried out sand control completion;
4. behind the sand control completion on the two gas reservoir well sections or before beat bridging plug and carry out packing, namely between two gas reservoirs, set up the artificial natural gas migration pathway with the exploitation Abnormal High Pressure Gas Reservoirs, simultaneously the well section on the discarded construction well bridging plug;
5. the natural gas in the Abnormal High Pressure Gas Reservoirs by above-mentioned artificial natural gas migration pathway, flows to the lower production gas reservoir of strata pressure of having developed under the effect of pressure reduction;
6. the interior relatively low pressure natural gas of the production gas reservoir that the abnormal pressure natural gas that flows into and the strata pressure of having developed are lower mixes, step-down, jointly flow to producing well;
7. natural gas flows out from producing pattern, thereby realizes by the exploitation to Abnormal High Pressure Gas Reservoirs of existing production platform or subsea production system.
2. the development approach of Abnormal High Pressure Gas Reservoirs according to claim 1 is characterized in that: after 3. described step is finished, the working solution in the two gas reservoir well sections can be discharged.
3. the development approach of Abnormal High Pressure Gas Reservoirs according to claim 1, it is characterized in that: described step 4. in, before the top well section on the discarded construction well bridging plug, can utilize a plurality of Multilateral Wells of construction well sidetracking, and with reference to above-mentioned steps 2. to 4. setting up a plurality of new artificial natural gas migration pathways with the exploitation Abnormal High Pressure Gas Reservoirs by a plurality of Multilateral Wells, the last well section on discarded each Multilateral Wells bridging plug.
4. the development approach of Abnormal High Pressure Gas Reservoirs according to claim 1, it is characterized in that: large or when having another Abnormal High Pressure Gas Reservoirs need adopt the inventive method exploitation when the distribution area of selected Abnormal High Pressure Gas Reservoirs to be developed, drill ship can move on to new correct position, sets up new artificial natural gas migration pathway with the exploitation Abnormal High Pressure Gas Reservoirs by above-mentioned steps.
5. the development approach of Abnormal High Pressure Gas Reservoirs according to claim 1, it is characterized in that: described Abnormal High Pressure Gas Reservoirs refers to that gas reservoir pressure is higher than hydrostatic pressure, and pressure coefficient is greater than 1.2 gas reservoir.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2012104295050A CN102926719A (en) | 2012-11-01 | 2012-11-01 | Method for exploiting abnormally high-pressure gas deposit |
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| CN2012104295050A CN102926719A (en) | 2012-11-01 | 2012-11-01 | Method for exploiting abnormally high-pressure gas deposit |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2736381A (en) * | 1953-10-26 | 1956-02-28 | Texas Co | Method of increasing recovery from a subsurface oil or condensate reservoir |
| 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 |
| US5842518A (en) * | 1997-10-14 | 1998-12-01 | Soybel; Joshua Richard | Method for drilling a well in unconsolidated and/or abnormally pressured formations |
| RU2295632C1 (en) * | 2006-03-13 | 2007-03-20 | Закрытое акционерное общество научно-производственное предприятие ЗАО НПП "СибБурМаш" | Method for well drilling and development of multihorizon hydrocarbon field characterized by non-uniform geological conditions of productive bed attitudes |
-
2012
- 2012-11-01 CN CN2012104295050A patent/CN102926719A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2736381A (en) * | 1953-10-26 | 1956-02-28 | Texas Co | Method of increasing recovery from a subsurface oil or condensate reservoir |
| 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 |
| US5842518A (en) * | 1997-10-14 | 1998-12-01 | Soybel; Joshua Richard | Method for drilling a well in unconsolidated and/or abnormally pressured formations |
| RU2295632C1 (en) * | 2006-03-13 | 2007-03-20 | Закрытое акционерное общество научно-производственное предприятие ЗАО НПП "СибБурМаш" | Method for well drilling and development of multihorizon hydrocarbon field characterized by non-uniform geological conditions of productive bed attitudes |
Non-Patent Citations (2)
| Title |
|---|
| 李传亮: "《异常高压气藏开发上的错误认识》", 《西南石油大学学报》 * |
| 李凌云等: "《胜坨油田异常高压低渗透油藏的高效开发》", 《胜利油田职工大学学报》 * |
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Application publication date: 20130213 |