Processing method of shale refracturing

A technology of refracturing and shale, which is applied in the direction of earthwork drilling, production fluid, wellbore/well components, etc., and can solve the problem of lack of refracturing fractures

Active Publication Date: 2018-11-06
INST OF ROCK AND SOIL MECHANICS - CHINESE ACAD OF SCI +1
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Problems solved by technology

[0005] The present invention provides a treatment method for repeated fracturing of shale to solve or partially solve the technical problem of lack of techniques and means for direct observation of repeated fracturing. Fracturing physical simulation, analysis of repeated

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  • Processing method of shale refracturing

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Embodiment Construction

[0044] In order to enable those skilled in the technical field to which the application belongs to understand the application more clearly, the technical solutions of the application will be described in detail below through specific embodiments in conjunction with the accompanying drawings.

[0045] The embodiment of the present invention provides a treatment method for shale repeated fracturing, which can adjust parameters such as the type of fracturing fluid used, three-dimensional stress conditions, pump pressure displacement, type and amount of temporary plugging agent according to research needs, Obtain the intuitive interference characteristics of the fracture morphology of the second fracturing after shale refracturing, provide support for the design of process parameters for shale reservoir refracturing wells, and help reactivate those shale oil and gas wells that have been abandoned or will soon be abandoned is of great significance. The invention can not only carry ...

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Abstract

The invention discloses a processing method of shale refracturing. The processing method of shale refracturing comprises the steps that shale samples are subjected to initial fracturing and secondaryfracturing, tracks are displayed with different colors, and hydraulic fracture forms is analyzed after two-time fracturing, intuitive interference characteristics of the two fracturing fracture formsafter shale refracturing can be obtained; and in addition, the steering characteristics of initial fracturing fractures of the shale samples under the action of temporary plugging agents are analyzed,the characteristics of initial fracturing pump pressure curves of the shale samples and secondary fracturing pump pressure curves of the first shale sample are analyzed, support for a shale reservoirrefracturing well technological parameter design is provided, and the processing method is of great significance for reactivating shale oil and gas wells which are abandoned or are about to be abandoned. The processing method can be used not only for physical simulation of refracturing shale gas reservoir rock mass, but also for other dense reservoir rock mass, and improves the applicability.

Description

technical field [0001] The present application relates to the technical field of physical simulation test of shale repeated fracturing, in particular to a treatment method for shale repeated fracturing. Background technique [0002] With the adjustment of the global energy structure, the requirements for environmental protection are getting higher and higher. As an efficient and high-quality clean energy, shale gas is the best choice for low-carbon consumption. The recoverable reserves of shale gas in my country are 36.08×10 12 m 3 , ranking first in the world; but because shale gas reservoirs are composed of lithified clay organic matter and minerals, although organic matter can produce rich shale gas, the gaps between these clear-textured rocks are too small, The permeability is low, and it is much more difficult to exploit than conventional natural gas. In order to achieve high-efficiency mining, currently the hydraulic fracturing technology is mainly used for reservoi...

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Application Information

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IPC IPC(8): E21B43/26E21B49/00
CPCE21B43/26E21B49/00
Inventor 郭印同杨春和肖佳林李奎东王磊徐峰
Owner INST OF ROCK AND SOIL MECHANICS - CHINESE ACAD OF SCI
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