Method and device for evaluating stratum hydrofracturing effect

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: 2019-12-03
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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  • Method and device for evaluating stratum hydrofracturing effect
  • Method and device for evaluating stratum hydrofracturing effect
  • Method and device for evaluating stratum hydrofracturing effect

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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 invention provides a method and device for evaluating a stratum hydrofracturing effect. The method comprises the steps that array acoustic logging is carried out in a depth interval, and dipole acoustic logging data at different azimuths is built; the dipole acoustic logging data at different azimuths is subjected to filtering processing and normalization processing, scattered wave energy envelopes before and after fracturing are calculated, and the dipole acoustic logging shear wave velocity difference before and after fracturing and the difference of scattered wave energy are utilized for being united to evaluate the circum-well fracturing effect. Compared with the existing fracturing effect evaluating effect, the method has the advantages that the fracturing effect in the shaft direction can be evaluated, and the fracturing effect within the range of tens of meters in the circum-well radial direction can be evaluated.

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...

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Application Information

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Patent Type & Authority Applications(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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