A method and device for determining the location of a microseismic source
A technology of microseismic and hypocenter, applied in seismology, measurement device, seismic signal processing, etc., can solve problems such as amazing calculation amount and difficult real-time location of construction site.
Active Publication Date: 2018-02-02
BC P INC CHINA NAT PETROLEUM CORP +1
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Problems solved by technology
The higher the monitoring accuracy of the seismic source position, the finer the grid division of the observation area is required, and the resulting calculation amount is also staggering, making it difficult to realize real-time positioning of the construction site; the lower the monitoring accuracy, the faster the calculation speed, However, it often fails to meet the needs of monitoring
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[0040] In order to enable those skilled in the art to better understand the technical solutions in the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described The embodiments are only some of the embodiments of the present application, but not all of them. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without creative efforts shall fall within the scope of protection of this application.
[0041] The specific implementation of the embodiment of the present application will be described in detail below with several specific examples.
[0042]An embodiment of a method for determining the source location of a microseismic event of the present application is firstly introduced below. figure 1 It is a flow chart of an embodimen...
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The embodiments of the invention provide a method and apparatus for determining a hypocenter position of a micro earthquake. The method comprises the following steps: performing multi-grid dissection processing on an observation area successively according to a decreasing sequence in terms of sizes in accordance with multiple preset grid lengths until the grid lengths are preset hypocenter position detection precision; determining first arrival time when grid nodes obtained after the multi-grid dissection processing arrive at observation points, and a micro earthquake record corresponding to the first arrival time; based on the first arrival time when the grid nodes arrive at the observation points and the corresponding micro earthquake record, according to the grid lengths corresponding to the multi-grid dissection processing, in accordance with a decreasing sequence in terms of sizes, performing multi-space scanning processing on the grid nodes, and determining grid nodes corresponding to maximum superposition energy in the observation area; and according to the grid nodes corresponding to the maximum superposition energy, determining the hypocenter position of the micro earthquake. By using the technical scheme provided by the embodiments of the invention, under the condition that the positioning precision of the hypocenter position is ensured, the automatic positioning operation speed is improved.
Description
technical field [0001] The invention relates to the technical field of microseismic monitoring, in particular to a method and a device for determining the location of a microseismic source. Background technique [0002] Microseismic monitoring technology is a new geophysical technology that has emerged in the past 20 years. With the development and maturity of microseismic monitoring theory, microseismic monitoring technology is widely used in hydraulic fracturing fracture monitoring, oil field safety monitoring, oil field dynamic monitoring, and mine safety. There are important applications in other fields. The key to microseismic monitoring technology is to accurately determine the source location. [0003] The methods for determining the source location of microseismic earthquakes in the prior art mainly include the source location location based on model forward modeling. This method can determine the source location by comparing the correlation between model forward mo...
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IPC IPC(8): G01V1/28
CPCG01V1/288
Inventor 金其虎李飞刘臣刘聪伟衡峰王高成
Owner BC P INC CHINA NAT PETROLEUM CORP