A retrieval method and system for a hydrofracture microseism focal mechanism

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

Active Publication Date: 2016-04-27
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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  • A retrieval method and system for a hydrofracture microseism focal mechanism
  • A retrieval method and system for a hydrofracture microseism focal mechanism
  • A retrieval method and system for a hydrofracture microseism focal mechanism

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no. 1 example

[0042]figure 1 It is a flow chart of the inversion method of the hydraulic fracturing microseismic source mechanism according to the first embodiment of the present invention. Refer below figure 1 Each step of this method will be described in detail.

[0043] Step S110, the step of picking up the P-wave amplitude curve, respectively intercepts the first-arrival P-wave waveforms of hydraulic fracturing microseismic events monitored by each channel geophone, and extracts the corresponding maximum absolute amplitude from each first-arrival P-wave waveform. The amplitude value of , and the P wave amplitude curve is composed of the extracted amplitude values.

[0044] For a pure shear source, the amplitude and polarity of the P waves radiated in various directions centered on the source are different. Therefore, based on the properties of the above-mentioned P-wave, the focal mechanism of the fracture can be inverted by using the P-wave amplitude information in the ground microse...

no. 2 example

[0075] Figure 7 is a schematic diagram of the structure of the 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 Among them, the P wave amplitude curve picking module 71 of this embodiment executes the operation of step S110 of the first embodiment, the P wave amplitude curve correction module 72 executes 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 inversion extraction module 74 of the fault node solution executes the operation of step S140 of the first embodiment. It will not be expanded in detail here.

[0077] Those skilled in the art should understand that each module or each step of the present invention described above can be realized by a general-purp...

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Abstract

The invention provides a retrieval method and system for a hydrofracture microseism focal mechanism. The retrieval method comprises the steps of P wave amplitude curve pickup, P wave amplitude curve correction, P wave amplitude curve smoothing and fault nodal plane solution retrieval extraction. By establishing an amplitude correction factor and a median filter operator, a pickup P wave amplitude curve is processed and a grid point search algorithm is used for retrieval of a fractured fissure foal mechanism. The method is stable and effective and can promote the development of the hydrofracture ground microseism monitoring data processing technology to a certain extent.

Description

technical field [0001] The invention relates to the field of petroleum exploitation, in particular to an inversion method and system for a hydraulic fracturing microseismic source mechanism. Background technique [0002] Hydraulic fracturing is a method of fracturing rock formations with water pressure to release natural gas or oil in them. It is widely used in the field of oil extraction, especially in the development of unconventional resources such as low-permeability oil reservoirs. The 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] Microseismic Inc. (MSI) of the United States proposed the hydraulic fracture imagin...

Claims

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Application Information

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Patent Type & Authority Applications(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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