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Inversion method and system for microseismic focal mechanism of hydraulic fracturing

A hydraulic fracturing and focal mechanism technology, applied in seismic signal processing, seismology for well logging, special data processing applications, etc., can solve problems such as lack of application examples, and achieve the effect of development promotion

Active Publication Date: 2018-08-31
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, in the entire field of oil and gas exploration and development in China, the research on related methods for hydraulic fracture focal mechanism inversion is still in its infancy, and there is a lack of successful application examples

Method used

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  • Inversion method and system for microseismic focal mechanism of hydraulic fracturing
  • Inversion method and system for microseismic focal mechanism of hydraulic fracturing
  • Inversion method and system for microseismic focal mechanism of hydraulic fracturing

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no. 1 example

[0042] figure 1 It is a flow chart of the inversion method of the microseismic focal mechanism of hydraulic fracturing according to the first embodiment of the present invention. Reference below figure 1 Let's explain in detail the steps of this method.

[0043] Step S110, the step of picking up the P wave amplitude curve, respectively intercept the first arrival P wave waveform of the hydraulic fracturing microseismic event monitored by the geophones, and extract the maximum absolute amplitude corresponding to each of the first arrival P wave waveforms. The amplitude value of P wave is composed of the extracted amplitude value.

[0044] For a pure shear source, the amplitude and polarity of the P waves radiated in various directions around the source are different. Therefore, based on the above-mentioned properties of P waves, the P wave amplitude information in the surface microseismic monitoring data of hydraulic fracturing can be used to invert the focal mechanism of fractur...

no. 2 example

[0075] Figure 7 It is a schematic structural diagram of a rock pore structure parameter inversion system according to the second embodiment of the present invention. Refer to Figure 7 To illustrate the composition of each part of this embodiment.

[0076] Specifically in Figure 7 In this embodiment, the P wave amplitude curve pickup module 71 performs the operation of step S110 of the first embodiment, the P wave amplitude curve correction module 72 performs the operation of step S120 of the first embodiment, and the smoothing processing module of the P wave amplitude curve 73 executes the operation of step S130 of the first embodiment, and the tomographic nodal solution inversion extraction module 74 executes the operation of step S140 of the first embodiment. I will not expand it in detail here.

[0077] Those skilled in the art should understand that the above-mentioned modules or steps of the present invention can be implemented by a general computing device. They can be con...

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Abstract

The invention discloses an inversion method and system for a hydraulic fracturing microseismic source mechanism. The inversion method comprises the following steps: a step of picking up a P-wave amplitude curve, a correction step of the P-wave amplitude curve, and a smoothing of the P-wave amplitude curve Processing steps and inversion extraction steps of the fault nodal solution. The invention processes the picked-up P-wave amplitude curve by establishing an amplitude correction factor and a median filter operator, and uses a grid point search algorithm to reverse the seismic source mechanism of fracturing fractures. The method is stable and efficient, and has a certain role in promoting the development of hydraulic fracturing surface microseismic monitoring data processing technology.

Description

Technical field [0001] The invention relates to the field of petroleum exploitation, and in particular to an inversion method and system for hydraulic fracturing microseismic source mechanism. Background technique [0002] Hydraulic fracturing is a method of fracturing rocks with water pressure to release the natural gas or oil in them. It is widely used in the field of petroleum exploitation, especially the development of unconventional resources such as low permeability reservoirs. Microseismic monitoring technology mainly monitors the fracturing process by monitoring the microseismic signals generated during the hydraulic fracturing process, evaluates the fracturing effect, and then guides the optimization of engineering parameters. In terms of microseismic monitoring technology, foreign countries The development is relatively early and the technology is relatively mature. [0003] The American Microseismic Company (MSI) proposed the hydraulic fracturing fracture imaging techno...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F19/00G01V1/50
Inventor 杨心超朱海波郭全仕
Owner CHINA PETROLEUM & CHEM CORP
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