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Low permeating oil layer vertical crack directional perforating crushing method

A technology of directional perforation and vertical fracture, which is applied in the direction of earthwork drilling, production fluid, wellbore/well components, etc. It can solve the problems of high development cost, low natural production capacity, low permeability and so on, so as to avoid the difficult effect of water injection , Improve the seepage capacity and increase the effect of oil drainage area

Inactive Publication Date: 2007-07-18
DAQING OILFIELD CO LTD
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AI Technical Summary

Problems solved by technology

[0002] Due to poor reservoir physical properties, low permeability, and low natural production capacity in low-permeability oilfields, reservoir fracturing must be performed. According to conventional fracturing methods, the oil increase effect is poor, the development cost is high, and the benefit is poor

Method used

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  • Low permeating oil layer vertical crack directional perforating crushing method
  • Low permeating oil layer vertical crack directional perforating crushing method
  • Low permeating oil layer vertical crack directional perforating crushing method

Examples

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Embodiment 1

[0028] Example 1. The thickness of sandstone in layer PI7 of Well G155-80 is 1.3m, and the effective thickness is 0.6m.

[0029] 1. Determine the perforation azimuth:

[0030] According to the XMAC logging interpretation results of this block, the direction of the maximum horizontal principal stress is NE80°, the maximum horizontal principal stress is 31MPa, and the minimum horizontal principal stress is 28MPa. Run the "Directional Perforation Hydraulic Fracture Steering Curvature and Extension Path Software", input horizontal maximum stress 31MPa, horizontal minimum stress 28MPa, perforation azimuth angle (10.0, 20.0, 30.0 or 40.0) degrees, perforation length 0.65 m, The perforation density is 16.0 holes / m, the perforation diameter is 12.00 mm, the wellbore diameter is 0.13970 meters, and the depth of the fractured oil layer is 1820 meters. The fracture shape under different perforation azimuths can be obtained. According to the perforation direction, it should be set close t...

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Abstract

The present invention relates to vertical joint directional perforating and pressure fracturing process for low penetration oil reservoir. The process includes the following steps: determining perforation direction, determining perforation phase, determining pressure fracturing construction displacement, and determining the perforation portion. The process can produce two fractures in once pressure fracturing in one stratum, and can raise the effluent capacity of stratum, increase drainage area and raise output.

Description

Technical field: [0001] The invention relates to a downhole rock fracturing method in the field of oil production in an oil field, and belongs to a directional perforation fracturing method for vertical fractures in a low-permeability oil layer. Background technique: [0002] Due to poor reservoir physical properties, low permeability and low natural production capacity, low-permeability oilfields must undergo reservoir fracturing. According to conventional fracturing methods, the effect of increasing oil production is poor, the development cost is high, and the benefit is poor. The reason for fracturing stimulation is that artificial fractures pass through the damaged area and communicate with new oil-producing areas, and the seepage mode of formation fluid changes from radial flow to linear flow. If multiple fractures can be opened in a single oil layer, the seepage resistance of the formation can be greatly reduced, more new oil-producing areas can be added, the productio...

Claims

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Application Information

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IPC IPC(8): E21B43/17E21B43/117
Inventor 王岩楼张传绪柴立新赵艳波尹喜永于永波
Owner DAQING OILFIELD CO LTD
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