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A method and device for evaluating the effect of formation hydraulic fracturing

A hydraulic fracturing and fracturing technology, which is applied in the field of methods and devices, can solve the problems of inability to detect the radial fracturing effect of the formation, technical failure, etc., and achieve the effect of reliable method and technical support

Active Publication Date: 2021-11-05
YANGTZE UNIVERSITY
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Problems solved by technology

However, this method can only evaluate the effect of fracturing in the direction of the wellbore, but cannot detect the radial fracturing effect of the formation, and when the fracturing around the wellbore is a network of fractures, the technology fails

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  • A method and device for evaluating the effect of formation hydraulic fracturing
  • A method and device for evaluating the effect of formation hydraulic fracturing
  • A method and device for evaluating the effect of formation hydraulic fracturing

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Embodiment Construction

[0055] The present invention proposes a method for evaluating the effect of wellbore fracturing by using the energy difference of dipole acoustic logging scattered waves before and after fracturing. Compared with the existing fracturing effect evaluation technology, this method has the advantage of The fracturing effect in the wellbore direction can also realize the fracturing effect evaluation within the range of ten meters in the radial direction of the well circumference.

[0056] In order to make the purpose, features and advantages of the present invention more obvious and understandable, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the following The described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiment...

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Abstract

The present invention proposes a method and device for evaluating the effect of formation hydraulic fracturing. The method includes: performing array acoustic logging in a depth interval to construct dipole acoustic logging data in different azimuths; Filter and normalize the sonic logging data, calculate the energy envelope of scattered waves before and after fracturing, and use the difference in shear wave velocity and scattered wave energy of dipole acoustic logging before and after fracturing to jointly evaluate the wellbore pressure cracking effect. Compared with the existing fracturing effect evaluation technology, the advantage of this method is that it can not only evaluate the fracturing effect along the wellbore direction, but also realize the fracturing effect evaluation within tens of meters in the radial direction of the wellbore.

Description

technical field [0001] The invention belongs to the technical field of acoustic logging, and in particular relates to a method and device for evaluating hydraulic fracturing effects by using dipole shear wave scattering effects. Background technique [0002] Unconventional reservoirs (such as shale gas) have low permeability, and the main way to increase reservoir permeability is to generate complex network fractures. As an important means of developing tight reservoirs, fracturing stimulation has become an unconventional oil and gas reservoir. One of the key technologies developed. After fracturing measures are implemented in unconventional reservoirs, effective methods are needed to determine the effect of fracturing operations, obtain information such as the conductivity, geometry, complexity, and orientation of fracturing-induced fractures, and improve fracturing in shale gas reservoirs. Stimulation operation effect and gas well productivity, and enhanced natural gas re...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B43/26E21B47/00E21B47/14G06Q50/02
CPCE21B43/26E21B47/00E21B47/14G06Q50/02
Inventor 黑创罗明璋李修权张磊邹骁张玉龙谢小东
Owner YANGTZE UNIVERSITY
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