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Fracturing horizon optimization method and device for coalbed methane wells

A technology for coalbed methane wells and coal seams, which is applied in the field of fracturing horizon selection methods and devices for coalbed methane wells, and can solve the problems of no layer selection method, difficulty in determining the optimal fracturing horizon, large randomness of layer selection and fracturing effect, etc. , to achieve the effect of reducing downhole complexity, reducing impact and improving success rate

Active Publication Date: 2021-11-02
PETROCHINA CO LTD
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  • Abstract
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Problems solved by technology

[0004] However, at present, the fracturing layer selection of coalbed methane wells mainly relies on fracturing experience or refers to adjacent well data, and there is no quantitative layer selection method. Production practice shows that it is often difficult to determine the optimal fracturing layer location by relying on experience, resulting in layer selection and fracturing. The randomness of the cracking effect is very large

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  • Fracturing horizon optimization method and device for coalbed methane wells
  • Fracturing horizon optimization method and device for coalbed methane wells
  • Fracturing horizon optimization method and device for coalbed methane wells

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[0062] In order to enable those skilled in the art to better understand the technical solutions in the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described The embodiments are only some of the embodiments of the present application, not all of them. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without creative efforts shall fall within the scope of protection of this application.

[0063] refer to figure 1 As shown, the method for optimizing the fracturing horizon of a coalbed methane well in the embodiment of the present application may include the following steps:

[0064] S101. Identify the gas-producing potential coal seam in the target coalbed methane well based on well logging data and gas logging data.

[0065]...

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Abstract

The embodiment of the present application provides a method and device for optimizing the fracturing layer of a coalbed methane well. The coal-rock mechanical parameters of the gas-potential coal seam; the coal seam fracturing index corresponding to the gas-producing potential coal seam is determined according to the coal-rock mechanical parameter; and the preferred fracturing horizon is determined according to the coal seam fracturing index. The embodiment of the present application can realize the quantitative optimization of the fracturing layer of the coalbed methane well.

Description

technical field [0001] The present application relates to the technical field of fracturing of coalbed methane wells, in particular to a method and device for optimizing fracturing layers of coalbed methane wells. Background technique [0002] As an efficient and clean unconventional natural gas, coalbed methane is a new energy type encouraged by the state. At present, there are three low problems of "low pressure, low permeability, and low saturation" in the domestic coalbed methane mining process, and it is difficult to achieve industrial gas flow by relying on the natural permeability of coal seams. Therefore, hydraulic fracturing is the most effective production stimulation method for coalbed methane wells at present. Production practice shows that the fracturing effect of fracturing a specific layer of coal seam is better than that of fracturing the entire coal seam section. The fracturing energy will be dispersed, and the extension range of the fracture length will be...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06Q50/02E21B43/26
CPCE21B43/26G06Q50/02
Inventor 东振鲍清英孙粉锦张继东穆福元李五忠陈姗姗张义姜馨淳
Owner PETROCHINA CO LTD