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Recognition and interpreting evaluation method for shale reservoir fractured fractures

A technology for shale reservoir and fracture identification, which is applied in earth-moving drilling, wellbore/well components, and production fluids, etc., to improve fracturing stimulation effect, reduce production cost, and optimize shale fracturing design.

Active Publication Date: 2017-07-28
BC P INC CHINA NAT PETROLEUM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] At present, there is no indoor quantitative evaluation method for the identification and interpretation of fracturing fractures in shale reservoirs at home and abroad, so the present invention has certain innovation and forward-looking

Method used

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  • Recognition and interpreting evaluation method for shale reservoir fractured fractures
  • Recognition and interpreting evaluation method for shale reservoir fractured fractures
  • Recognition and interpreting evaluation method for shale reservoir fractured fractures

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Embodiment 1

[0040] A shale reservoir fracturing fracture identification and interpretation evaluation method, comprising the following steps:

[0041] Dynamic identification of hydraulic fractures in shale reservoirs under different formation stress conditions: the true triaxial hydraulic fracturing test device is used to simulate the stress state of shale samples under formation conditions, and the acoustic emission test device is used to obtain the shale test results during the injection process. The AE event points generated by the tensile and shear failures of the sample represent the hydraulic fracture expansion process of the shale sample;

[0042] Three-dimensional natural fracture and hydraulic fracture network reconstruction: CT scanning of shale samples after fracturing is completed to obtain images of natural fractures and artificial hydraulic fractures caused by hydraulic fracturing, and grayscale processing is performed on the entire image and point-by-point Scanning, extract...

Embodiment 2

[0087] The invention mainly includes three parts: dynamic identification of hydraulic fractures of shale reservoirs under different formation stress conditions, reconstruction of three-dimensional natural fractures and hydraulic fracture networks, and identification and interpretation of fracture networks based on microseismic monitoring. The main steps are: ① Use the true triaxial hydraulic fracturing test device to simulate the stress state of the shale sample under formation conditions, and use the acoustic emission test device to obtain the shale sample due to tension and shear damage during the injection process. These event points characterize the hydraulic fracturing fracture expansion process of shale samples; ②CT scans the shale samples after fracturing to obtain natural fractures and artificial hydraulic fractures caused by hydraulic fracturing image, grayscale processing is performed on the entire image and scanned point by point, and fracture network curves with dif...

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Abstract

The invention discloses a recognition and interpreting evaluation method for shale reservoir fractured fractures. The recognition and interpreting evaluation method mainly comprises the steps of hydraulic fracture dynamic recognition of a shale reservoir under different stratum prestress conditions, three-dimensional natural fracture and hydraulic fracture network reconstruction and fracture network recognition and interpretation based on microseismic monitoring. The recognition and interpreting evaluation method achieves complex fracture network distribution form cognition and evaluation on the basis of hydraulic fractured fracture dynamic recognition and fracture comprehensive correction of microseismic monitoring interpretation to guide a fracture optimally designed fracture-microseism integrated fracture network prediction and evaluation technology and has important production significance for optimizing fracture construction parameters such as the fracture construction scale, the discharge capacity and the sand adding quality, reducing production cost and improving the fracture improvement effect.

Description

technical field [0001] The invention relates to a shale reservoir fracturing fracture identification and interpretation evaluation method, which belongs to the field of shale reservoir fracturing fracture evaluation. Background technique [0002] Shale gas is a typical type of "self-generation and self-storage" reservoir, which generally has the characteristics of low porosity and low matrix permeability. Difficult; natural fracture fracture zones are well developed in shale blocks in southern my country, and the relationship between natural fractures and hydraulic fractures is intricate, which largely affects the effect of fracturing stimulation; the current reservoir stimulation volume (SRV) of microseismic interpretation is relatively low. The actual proppant-supported fractures are large in volume, and it is difficult to effectively reflect the authenticity of the stimulated fracture network. This determines that shale reservoir stimulation requires a different fracturing...

Claims

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Application Information

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IPC IPC(8): E21B49/00E21B43/26
CPCE21B43/26E21B49/00
Inventor 李彦超尹丛彬何封王素兵肖剑锋钱斌陈明忠熊雨然李莹
Owner BC P INC CHINA NAT PETROLEUM CORP
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