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Method for evaluating complexity of cracks

A technology of complexity and fracture, applied in the field of fracture complexity evaluation, it can solve problems such as three-dimensional fracture network complexity evaluation, and achieve the effect of accurate complexity.

Active Publication Date: 2015-11-25
PETROCHINA CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The above evaluation methods based on fracture parameters such as shape, direction, height and angle cannot accurately evaluate the complexity of the three-dimensional fracture network

Method used

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  • Method for evaluating complexity of cracks
  • Method for evaluating complexity of cracks
  • Method for evaluating complexity of cracks

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Embodiment Construction

[0015] 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, but 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.

[0016] An embodiment of the crack complexity evaluation method of the present application is introduced below. Such as figure 1 As shown, this embodiment includes the following steps:

[0017] S101: Obtain the volume of fracturing fluid used for fracturing the fracturing well, and the volume of horizontal fractures and vertical fracture...

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Abstract

The embodiment of the application discloses a method for evaluating the complexity of cracks. The method comprises the following steps: obtaining the volume of a fracturing fluid, which is used in fracturing of a fracturing well, the volume of a horizontal crack generated through fracturing and the volume of a vertical crack generated through fracturing; calculating a multi-crack coefficient and a crack complexity index through formulas according to the volume of the fracturing fluid, the volume of the horizontal crack and the volume of the vertical crack, wherein R represents the multi-crack coefficient, Ve represents the sum of the volumes of the horizontal crack and the vertical crack, Vi represents the volume of the fracturing fluid, beta represents the crack complexity index, Vh represents the volume of the horizontal crack, and Vv represents the volume of the vertical crack; and evaluating the complexity of the cracks generated through fracturing of the fracturing well. The method, disclosed by the embodiment of the application, can be used for evaluating the complexity of the cracks.

Description

technical field [0001] This application relates to the technical field of oil and gas development, in particular to a method for evaluating the complexity of fractures. Background technique [0002] At present, the development of oil and gas reservoirs generally adopts fracturing technology, through which the fractures generated by fracturing will penetrate the oil and gas reservoirs, improve their permeability, and ensure the smooth exploitation of oil and gas. In the process of fracturing, it is necessary to evaluate the complexity of the cracks produced by fracturing, so as to provide reference for the selection of subsequent construction parameters and process technology. [0003] In the prior art, fracture parameters such as shape, direction, height and angle are generally obtained through far-field monitoring technology and near-wellbore monitoring technology, and the complexity of the fracture is evaluated based on the fracture parameters such as shape, direction, hei...

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Application Information

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IPC IPC(8): E21B43/26E21B47/02E21B49/00
Inventor 王欣修乃岭刘玉章丁云宏严玉忠卢拥军毕国强窦晶晶骆禹卢海兵黄高传
Owner PETROCHINA CO LTD
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