CN104818977A - Single-well parallel crack water injection and oil extraction method of offshore low-permeability reservoir - Google Patents
Single-well parallel crack water injection and oil extraction method of offshore low-permeability reservoir Download PDFInfo
- Publication number
- CN104818977A CN104818977A CN201510103213.1A CN201510103213A CN104818977A CN 104818977 A CN104818977 A CN 104818977A CN 201510103213 A CN201510103213 A CN 201510103213A CN 104818977 A CN104818977 A CN 104818977A
- Authority
- CN
- China
- Prior art keywords
- branch
- water injection
- oil recovery
- water filling
- oil extraction
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/25—Methods for stimulating production
- E21B43/26—Methods for stimulating production by forming crevices or fractures
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/16—Enhanced recovery methods for obtaining hydrocarbons
- E21B43/20—Displacing by water
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/30—Specific pattern of wells, e.g. optimizing the spacing of wells
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Earth Drilling (AREA)
Abstract
The invention relates to a single-well parallel crack water injection and oil extraction method of an offshore low-permeability reservoir. A single well at least consists of a main well hole, and two oil extraction branches, a water injection branch and a set of parallel manual cracks positioned in a reservoir, wherein the oil extraction branches and the water injection branch are horizontal wells, and extend along a maximum main stress direction of a stratum; the water injection branch is positioned between the two oil extraction branches; the water injection branch and the oil extraction branches are subjected to the staged fracturing operation to generate the manual cracks parallel to shafts; the water injection operation is performed by the water injection branch positioned between the two oil extraction branches; and injected water diffuses along crack surfaces and enters the stratum after entering the manual cracks. The method has prominent effects on increment of the controlled reserve, reduction of the cost and improvement of the development effect in the development of the offshore low-permeability reservoir.
Description
Technical field
The present invention relates to a kind of marine LOW PERMEABILITY RESERVOIR individual well parallel fracture water injection oil extraction method.
Technical background
Because offshore oil and gas field is in marine environment, production facility and production well need to concentrate on offshore production platform or wellhead platform, due to platform construction with has bored the conditions such as investment is huge and limit, offshore oil and gas field can only adopt a limited number of well to realize exploitation, and its recovery percent of reserves, rate of oil production and economy are subject to a definite limitation.
When developing marine low-permeability oil deposit, because reservoir permeability is poor, oil gas is more difficult in underground flowing, developable petroleum resources in a bite well control range is less, and the method for land low-permeability oilfield many brills producing well and water injection well cannot be utilized due to offshore oil production facility and brill completion practice investment limitation to carry out the marine LOW PERMEABILITY RESERVOIR of effective exploitation.
Therefore, invent marine LOW PERMEABILITY RESERVOIR to utilize a bite well to control and develop and descend the method for petroleum resources to seem more urgent more.
Summary of the invention
The object of the present invention is to provide a kind of marine LOW PERMEABILITY RESERVOIR individual well parallel fracture water injection oil extraction method.Utilize two of a bite well oil recovery branches, a water filling branch and the man-made fracture group that is parallel to each other to form injection-production relation, increase the water injection oil extraction method of underground oil and gas controlling extent.
Marine LOW PERMEABILITY RESERVOIR individual well parallel fracture water injection oil extraction method of the present invention adopts following technical scheme to realize: a bite individual well forms by least comprising main borehole and being in two oil recovery branches in reservoir, a water filling branch and one group of man-made fracture be parallel to each other, described oil recovery branch and water filling branch are horizontal well and extend along stratum biggest principal stress direction, water filling branch, between two oil recovery branches, is implemented staged fracturing operation to water filling branch and oil recovery branch and is made water filling branch and oil recovery branch produce the man-made fracture parallel with pit shaft; Water injection work is implemented by the water filling branch between two oil recovery branches, spread along fracture surface after injection water enters man-made fracture and enter stratum, the oil on stratum is entered the oil recovery branch of both sides by the man-made fracture on the oil recovery branch of water filling branch both sides by displacement.
The water flooding regime of water filling branch of the present invention closes note or dispensing.
The effect increasing control reserve, reduce costs and improve development effectiveness in the present invention's LOW PERMEABILITY RESERVOIR exploitation is at sea significant.The present invention implements water injection work by the water filling branch between two oil recovery branches, spread along fracture surface after injection water enters man-made fracture and enter stratum, not only can reduce water injection pressure because injection area increases, also significantly can increase the sweep area injecting water.The oil recovery branch being in water filling branch both sides has due to it fracture surface paralleled with water filling branch man-made fracture section, not only increase the drainage area of oil recovery branch, also can benefit from displacement pressure degree of the passing impact that water filling section is set up, thus overcome switch DP and increase oil recovery effect.Because drilling oil content branch and water filling branch cost are far fewer than independent cost per well drilled, significantly can reduce the operating cost that petroleum resources controls, thus improve the economy of marine LOW PERMEABILITY RESERVOIR exploitation.
Accompanying drawing explanation
Fig. 1 is schematic diagram of the present invention.
Wherein: 1 main borehole, 2 reservoirs, 3 oil recovery branch A, 4 oil recovery branch B, 5 water filling branches, 31 work crack A31,41 work crack B, 51 work crack C.
Detailed description of the invention
The object of the invention can adopt following technical scheme to realize, marine LOW PERMEABILITY RESERVOIR exploitation individual well parallel fracture water injection oil extraction method, at least comprise main borehole 1 and two the oil recovery branch A3 be in reservoir 2 and oil recovery branch B4, a water filling branch 5 and one group of the man-made fracture A31 be parallel to each other, work crack B41, work crack C51 to form, two described oil recovery branches and water filling branch are horizontal well and extend along stratum biggest principal stress direction, water filling branch is between two oil recovery branches, and water filling branch and oil recovery branch are implemented staged fracturing operation and produced man-made fracture.
The length of oil recovery branch of the present invention and water filling branch and distance each other thereof are determined according to yield and Reservoir Scale.
The staged fracturing sum of series crack scale of two oil recovery branches of the present invention and water filling branch is according to horizontal section length 300-500 rice, if 2-3 level pressure break progression, and fracture half-length 50-100 rice.
The water flooding regime of water filling branch of the present invention is for closing note or dispensing.
Claims (1)
1. a marine LOW PERMEABILITY RESERVOIR exploitation individual well parallel fracture water injection oil extraction method, it is characterized in that: a bite individual well forms by least comprising main borehole and being in two oil recovery branches in reservoir, a water filling branch and one group of man-made fracture be parallel to each other, described oil recovery branch and water filling branch are horizontal well and extend along stratum biggest principal stress direction, water filling branch, between two oil recovery branches, is implemented staged fracturing operation to water filling branch and oil recovery branch and is made water filling branch and oil recovery branch produce the man-made fracture parallel with pit shaft; Water injection work is implemented by the water filling branch between two oil recovery branches, spread along fracture surface after injection water enters man-made fracture and enter stratum, the oil on stratum is entered the oil recovery branch of both sides by the man-made fracture on the oil recovery branch of water filling branch both sides by displacement.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510103213.1A CN104818977A (en) | 2015-03-10 | 2015-03-10 | Single-well parallel crack water injection and oil extraction method of offshore low-permeability reservoir |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510103213.1A CN104818977A (en) | 2015-03-10 | 2015-03-10 | Single-well parallel crack water injection and oil extraction method of offshore low-permeability reservoir |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104818977A true CN104818977A (en) | 2015-08-05 |
Family
ID=53729430
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510103213.1A Pending CN104818977A (en) | 2015-03-10 | 2015-03-10 | Single-well parallel crack water injection and oil extraction method of offshore low-permeability reservoir |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104818977A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108999604A (en) * | 2018-07-06 | 2018-12-14 | 中国石油大学(华东) | Fish bone well well construction and method for exploitation of gas hydrate |
| CN111946310A (en) * | 2020-08-27 | 2020-11-17 | 中国石油天然气股份有限公司 | Self-driving well for self-injection and self-production in same well layer and production method |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101289932A (en) * | 2007-04-17 | 2008-10-22 | 长江大学 | Straight-line parallel flow water injection oil extraction method |
| US20090283263A1 (en) * | 2008-05-13 | 2009-11-19 | Baker Hughes Incorporated | Systems, methods and apparatuses for monitoring and recovery of petroleum from earth formations |
| CN101806207A (en) * | 2010-04-26 | 2010-08-18 | 徐萍 | Horizontal well three-dimensional intersection well pattern structure |
| CN101855421A (en) * | 2007-07-06 | 2010-10-06 | 哈利伯顿能源服务公司 | Heated fluid injection using multilateral wells |
| CN102628353A (en) * | 2012-03-21 | 2012-08-08 | 中国海洋石油总公司 | Well pattern adjustment and well pattern encryption method applied to on-sea hypotonic oil deposit exploitation |
-
2015
- 2015-03-10 CN CN201510103213.1A patent/CN104818977A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101289932A (en) * | 2007-04-17 | 2008-10-22 | 长江大学 | Straight-line parallel flow water injection oil extraction method |
| CN101855421A (en) * | 2007-07-06 | 2010-10-06 | 哈利伯顿能源服务公司 | Heated fluid injection using multilateral wells |
| US20090283263A1 (en) * | 2008-05-13 | 2009-11-19 | Baker Hughes Incorporated | Systems, methods and apparatuses for monitoring and recovery of petroleum from earth formations |
| CN101806207A (en) * | 2010-04-26 | 2010-08-18 | 徐萍 | Horizontal well three-dimensional intersection well pattern structure |
| CN102628353A (en) * | 2012-03-21 | 2012-08-08 | 中国海洋石油总公司 | Well pattern adjustment and well pattern encryption method applied to on-sea hypotonic oil deposit exploitation |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108999604A (en) * | 2018-07-06 | 2018-12-14 | 中国石油大学(华东) | Fish bone well well construction and method for exploitation of gas hydrate |
| CN111946310A (en) * | 2020-08-27 | 2020-11-17 | 中国石油天然气股份有限公司 | Self-driving well for self-injection and self-production in same well layer and production method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103967472B (en) | A kind of coal bed gas staged fracturing horizontal well enhanced gas extraction method | |
| CN102654049B (en) | Porous linear control hydraulic fracturing method | |
| CN102080526B (en) | Method for extracting gas from bedding level fractured well of ground coal seam roof | |
| CN106194131B (en) | It is spaced CO between multistage fracturing horizontal well seam2Oil flooding method | |
| CN102619552B (en) | Directional hydraulic pressing penetration, permeability increase and outburst elimination method of guide groove | |
| CN110397428B (en) | Displacement coalbed methane yield increasing method for coalbed methane jointly mined by vertical well and U-shaped butt well | |
| CN104963671B (en) | A kind of fracturing reform method of High angle from formula well reservoir | |
| CN102817603B (en) | A kind of method being communicated with ground and underground coal seam gas | |
| EA201692171A1 (en) | METHOD OF PRODUCTION OF HYDROCARBONS | |
| CN105822276B (en) | Interval while water injection oil extraction method between multistage fracturing horizontal well seam | |
| CN104818978A (en) | One-well multi-control method for offshore low-permeability reservoir thick oil layer exploitation | |
| CN104632164A (en) | Method for breaking through interlayer in oil layer during double-horizontal-well SAGD exploiting | |
| CN102720528A (en) | Underground coal mine repeating pulsation hydrofracture strengthened gas extracting method | |
| CN106761612B (en) | The asynchronous water injection oil extraction method of double different wells of pressure break horizontal well of zip mode cloth seam | |
| CN104790931A (en) | On-sea low-permeability reservoir thin interbed injection-recovery branched well control-increased method | |
| CN105587300B (en) | Oil production method for horizontal well | |
| CN105350948B (en) | Shale gas horizontal well fracturing method and shale gas horizontal well completion method | |
| CN106246156A (en) | Method made by a kind of explosion fracturing acidifying connection | |
| CN114135265B (en) | Low-cost and high-efficiency transformation process method for low-permeability reservoir of offshore oil field | |
| CN102767353A (en) | Comprehensive mining technology of drowned well | |
| US20150218886A1 (en) | Penetrating A Subterranean Formation | |
| CN104818977A (en) | Single-well parallel crack water injection and oil extraction method of offshore low-permeability reservoir | |
| CN103628848B (en) | Multidirectional interlayer displacement in flooding oil production method and system | |
| CN105041274A (en) | Short-range two-layer oil-gas reservoir commingled production technique | |
| CN103032059B (en) | A kind of directed hydraulic pressure burst communicatin exploitation method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| EXSB | Decision made by sipo to initiate substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20150805 |
|
| WD01 | Invention patent application deemed withdrawn after publication |