Method for physically simulating sectional hydrofracture of different well types of perforated well shafts

A technology of hydraulic fracturing and physical simulation, which is applied in the direction of wellbore/well components, earthwork drilling and production, and production fluid, etc. Interference between fracturing and multi-stage hydraulic fracturing
CN104060976AActive Publication Date: 2014-09-24CHINA UNIV OF PETROLEUM (BEIJING)
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Patent Information

Authority / Receiving Office
CN Β· China
Patent Type
Applications(China)
Current Assignee / Owner
CHINA UNIV OF PETROLEUM (BEIJING)
Publication Date
2014-09-24

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Abstract

The invention belongs to the field of technical research on oil and gas reservoir development and particularly relates to a method for physically simulating sectional hydrofracture of different well types of perforated well shafts. The method comprises the following steps of: (1) processing a simulated shaft and arranging bullet holes on the well wall of the simulated shaft; (2) prefabricating the simulated shaft in the step (1) into an artificial core test sample and developing a hydrofracture physical simulation experiment by utilizing a true triaxial hydrofracture device system; and (3) observing fracture initiation and extension forms of hydraulic fractures at the positions of the bullet holes on the well wall of the simulated shaft by the hydrofracture physical simulation experiment in the step (2). According to the method, aiming at geological development blocks with different reservoir structures, different well types and fracture processes can be selected to carry out effective indoor simulation evaluation research; and the theoretical foundation is provided for design and scheme optimization of the hydrofracture process of conventional or unconventional dense oil and gas reservoirs and complex oil-gas blocked deposits.
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Description

technical field

[0001] The invention belongs to the technical research field of oil and gas reservoir development, and in particular relates to a physical simulation method for segmental hydraulic fracturing of perforated well bores of different well types. Background technique

[0002] my country's land shale gas, coalbed methane, tight oil and gas and other unconventional oil and gas reservoirs and offshore oil and gas reservoirs are widely distributed, with huge prospective reserves. Efficient development of such oil and gas reservoirs has been the long-term focus of the petroleum industry. Unconventional oil and gas reservoirs are characterized by low porosity and low permeability. Efficient development of such unconventional oil and gas reservoirs requires large-scale hydraulic fracturing operations. However, offshore and coastal oil and gas reservoirs have limited drilling platforms, and at the same time, there are many layers of underground reservoirs, uneven horizont...

Claims

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