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Non-uniform clustering perforation optimization method for non-homogeneous shale

A non-uniform clustering and heterogeneity technology, which is applied in the fields of earthwork drilling, fluid production, measurement, etc., can solve the problem of difficulty in realizing the optimization method of non-uniform clustering perforation in heterogeneous shale, and achieve a certain Conducive to large-scale synthesis, avoiding large-scale pouring, and the effect of simple and convenient methods

Active Publication Date: 2019-07-12
CHINA UNIV OF PETROLEUM (BEIJING)
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Problems solved by technology

[0007] The main purpose of the present invention is to provide a non-uniform cluster perforation optimization method for heterogeneous shale to solve the technical problem that it is difficult to realize the non-uniform cluster perforation optimization method for heterogeneous shale in the prior art

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[0048] In order to enable those skilled in the art to better understand the solutions of the present invention, the following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only It is an embodiment of a part of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present invention.

[0049] It should be noted that the terms "comprising" and "having" in the description and claims of the present invention and the above drawings, as well as any variations thereof, are intended to cover a non-exclusive inclusion, for example, including a series of steps or units A process, method, system, product or device is not ne...

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Abstract

The invention discloses a non-uniform clustering perforation optimization method for non-homogeneous shale. The non-uniform clustering perforation optimization method comprises the steps that a plurality of shale targets are manufactured according to the reservoir shale characteristics of different well segments of shale horizontal wells, wherein the reservoir shale characteristics comprise the shale bedding inclination angle, the mechanical properties of the shale, the crack characteristics and the lithologic characteristic, and one or more reservoir shale characteristics of any two shale targets are different; and the multiple shale targets are subjected to a perforation test through multiple perforation modes and multiple perforation parameters, and the hole quality parameters, the rockpermeability and the development situation of impact cracks around a hole after perforation are detected so as to determine the influence law of different influence factors on the hole quality parameters, the rock permeability and the development situation of impact cracks around the hole; and non-uniform clustering perforation optimization of the non-homogeneous shale is conducted according to the influence law. According to the non-uniform clustering perforation optimization method, the technical problem that a non-uniform clustering perforation optimization method of the non-homogeneous shale is difficult to realize in the prior art is solved.

Description

technical field [0001] The invention relates to the technical field of volume fracturing stimulation of shale gas reservoirs, in particular to a non-uniform cluster perforation optimization method for heterogeneous shale. Background technique [0002] Shale gas refers to unconventional natural gas that occurs in organic-rich shale and its interlayers, mainly in the state of adsorption and free. It is a clean and efficient energy resource and chemical raw material. Compared with conventional natural gas Shale gas resources mainly have the following characteristics: (1) Abundant reserves. It is estimated that the world's shale gas resources are 457 trillion cubic meters, equivalent to conventional natural gas resources, of which shale gas technically recoverable resources are 187 trillion cubic meters. The top five countries in terms of technically recoverable shale gas resources in the world are: China (36 trillion cubic meters, accounting for about 20%), the United States (...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B43/116E21B43/26E21B47/00
CPCE21B43/116E21B43/26E21B47/00
Inventor 李军王滨张辉柳贡慧翟文宝颜辉
Owner CHINA UNIV OF PETROLEUM (BEIJING)
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