Elastic wave forward modeling of simulated micro earthquake

A microseismic and elastic wave technology, applied in seismology, seismic signal processing, geophysical measurement, etc., can solve the problems of large amount of calculation and reduce the simulation accuracy, achieve the effect of rich information and avoid large amount of calculation

Inactive Publication Date: 2016-12-07
CHINA PETROLEUM & CHEM CORP +1
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Problems solved by technology

However, in the process of obtaining the Green's function method, the Green's function needs to be obtained many times, and the calculation amount is large, and the calculation of the Green's function needs to be approximated, which reduces the accuracy of the simulation.

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  • Elastic wave forward modeling of simulated micro earthquake
  • Elastic wave forward modeling of simulated micro earthquake
  • Elastic wave forward modeling of simulated micro earthquake

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Embodiment Construction

[0021] In order to make the above and other objects, features and advantages of the present invention more comprehensible, the preferred embodiments are listed below and shown in the accompanying drawings in detail as follows.

[0022] Such as figure 1 as shown, figure 1 It is a flow chart of the elastic wave forward modeling method for simulating microseismic in the present invention.

[0023] In step 101, according to the actual data of the geological survey, the properties of the rock are analyzed to determine the rock fracture mode. At the same time, through the analysis of the actual microseismic data received during the hydraulic fracturing process, the magnitude of the microseismic is obtained, thereby generating a moment tensor matrix expressing the microseismic source where M ij It is the magnitude of rock fracture. Each element in the moment tensor represents the action of a pair of opposing forces.

[0024] In step 102, read the pre-established geological velo...

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Abstract

The invention provides the elastic wave forward modeling of simulated micro earthquake. The method comprises the steps that the rock property is analyzed according to the actual data of geological survey; the mode of rock fracture is determined; a moment tensor matrix expressing a micro earthquake source is generated; the geological velocity field model of an explored area is established; under a fluctuation theory, an elastic wave fluctuation equation which is suitable for describing the propagation of a micro earthquake wave field is established; under the fluctuation theory, a micro earthquake elastic wave fluctuation equation is solved to realize micro earthquake wave field propagation simulation; simulation is completed; and multi-component recording of micro earthquake ground and in a well and longitudinal and transverse wave energy radiation patterns are output. According to the elastic wave forward modeling of simulated micro earthquake, a simulation result which is more accurate than a ray theory can be quickly acquired; the amount of information is abundant; and better technical means and tools are provided for subsequent characteristic law analysis, location method research and earthquake source parameter inversion.

Description

technical field [0001] The invention relates to the technical field of oilfield development, in particular to an elastic wave forward modeling method for simulating microseismic. Background technique [0002] Since the beginning of the 21st century, unconventional oil and gas resources have shown great development potential. Among many unconventional oil and gas exploration and development methods, microseismic monitoring technology plays a pivotal role. [0003] In order to fully grasp the microseismic technology, it is necessary to conduct in-depth understanding and research on the positive problem and focal mechanism of microseismic, and the most convenient way to achieve this goal is the seismic wave numerical simulation technology. Conventional seismic forward modeling techniques use seismic wavelets as seismic sources, which are only suitable for explosive seismic sources or vibroseis in conventional seismic exploration, but cannot describe microseismic sources well. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01V1/28G01V1/30
CPCG01V1/282G01V1/307G01V2210/63
Inventor 隆文韬廉西猛王延光黄超王修敏陈云峰张猛王修银王贤真
Owner CHINA PETROLEUM & CHEM CORP
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