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A fracturing method for normal pressure shale gas horizontal wells

A technology for shale gas and horizontal wells, which is applied in earth-moving drilling, wellbore/well components, and production fluids, etc. It can solve the problems that cannot be well adapted to normal pressure shale gas fracturing construction, fracture complexity and effective reconstruction The problem of high volume is achieved to ensure economical and effective development, improve fracture complexity, and increase the effect of reformation volume

Active Publication Date: 2021-01-05
CHINA PETROLEUM & CHEM CORP +1
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Problems solved by technology

However, compared with high-pressure shale gas, normal-pressure shale gas has higher requirements for fracture complexity and effective stimulation volume, and the fracturing parameters of high-pressure marine shale gas cannot be well adapted to normal-pressure shale gas. fracturing construction

Method used

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  • A fracturing method for normal pressure shale gas horizontal wells
  • A fracturing method for normal pressure shale gas horizontal wells

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Embodiment Construction

[0025] The implementation of the present invention will be described in detail below in conjunction with the accompanying drawings and examples, so that implementers of the present invention can fully understand how the present invention uses technical means to solve technical problems, and achieve the realization process of technical effects and according to the above-mentioned realization process The present invention is implemented concretely. It should be noted that, as long as there is no conflict, each embodiment and each feature in each embodiment of the present invention can be combined with each other, and the formed technical solutions are all within the protection scope of the present invention.

[0026] At present, the resources of atmospheric shale gas (formation pressure coefficient 0.9-1.2) are huge. In the prior art, the successful fracturing experience of high-pressure marine shale gas is generally referred to for the fracturing of normal-pressure shale gas. ...

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Abstract

The invention discloses a fracturing method for an atmospheric pressure shale gas horizontal well. The method comprises: constructing a tree-shaped crack system comprising a main crack, branch cracksand micro cracks, wherein the main crack, the branch cracks and the micro cracks are sequentially constructed on the basis of fracturing fluid with different property characteristics, the branch cracks communicate with the main crack, and the micro cracks communicate with the branch cracks; and injecting a propping agent into the tree-shaped crack system. According to the method, the tree-shaped crack system for normal-pressure shale gas fracturing exploitation can be constructed, the crack complexity and the transformation size are improved, and economic and effective development of the normal-pressure shale gas horizontal well is ensured.

Description

technical field [0001] The invention relates to the field of oil and gas exploitation, in particular to a fracturing method for normal-pressure shale gas horizontal wells. Background technique [0002] With the continuous development of oil and gas, conventional oil and gas resources are gradually exhausted. In order to effectively exploit existing oil and gas resources and improve the exploitation efficiency of oil and gas resources, many new oil and gas extraction technologies have been proposed in the prior art. Among them, one of the more mature mining technologies is fracturing mining technology. [0003] Fracturing refers to a method that uses hydraulic action to form cracks in oil and gas layers during the process of oil or gas recovery, also known as hydraulic fracturing. Fracturing is to artificially create fractures in the formation, improve the flow environment of oil underground, increase the production of oil wells, and play an important role in improving the ...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B43/26E21B43/267
Inventor 蒋廷学卫然路保平卞晓冰王海涛苏瑗李双明肖博左罗
Owner CHINA PETROLEUM & CHEM CORP
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