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Microseismic positioning accuracy evaluation method and system based on normal distribution

A positioning accuracy and normal distribution technology, applied in the field of petroleum geophysical exploration, can solve problems such as difficulties in later interpretation, lack of positioning accuracy quality control evaluation technology, fracture length and fracture height errors, etc.

Active Publication Date: 2021-09-17
CHINA PETROLEUM & CHEM CORP +1
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Problems solved by technology

[0003] During the microseismic on-site monitoring process, due to the different processing and interpretation techniques and the lack of quality control and evaluation technology for positioning accuracy, the positioning accuracy of microseismic events is directly affected, and there are large errors in fracture length and fracture height, which cause certain problems for later interpretation. difficulty

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  • Microseismic positioning accuracy evaluation method and system based on normal distribution
  • Microseismic positioning accuracy evaluation method and system based on normal distribution
  • Microseismic positioning accuracy evaluation method and system based on normal distribution

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[0036] The present invention will be described in more detail below with reference to the accompanying drawings. Although preferred embodiments of the invention are shown in the drawings, it should be understood that the invention may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art.

[0037] figure 1 A flow chart showing the steps of the normal distribution-based microseismic positioning accuracy evaluation method according to the present invention.

[0038] In this embodiment, the microseismic positioning accuracy evaluation method based on normal distribution according to the present invention may include: Step 101, according to the microseismic monitoring records, determine the positioning position of the microseismic positioning; Step 102, according to the posi...

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Abstract

A method and system for evaluating microseismic positioning accuracy based on normal distribution are disclosed. The method may include: determining the positioning position of the microseismic positioning according to the monitoring records of the microseismic; calculating the average energy at different offsets according to the positioning position, and then obtaining the average energy characteristic function, and the average energy characteristic function obeys a normal distribution ; Calculate the confidence parameter of the average energy characteristic function, and analyze the microseismic positioning accuracy according to the confidence parameter. The present invention realizes microseismic positioning accuracy evaluation through the law that the average energy characteristic function obeys the normal distribution, has fast calculation speed, high efficiency, and is relatively simple and easy to implement.

Description

technical field [0001] The present invention relates to the field of petroleum geophysical exploration, and more specifically, to a method and system for evaluating microseismic positioning accuracy based on normal distribution. Background technique [0002] In the engineering of hydraulic fracturing and reservoir monitoring, the network fractures formed by fracturing are the key factors for the difference in natural production decline and productivity. Microseismic monitoring technology is used to analyze the expansion law of fracturing fractures and the evaluation of reservoir stimulation effects. Single well production One of the key technologies of difference analysis, the real-time monitoring of cracks is the most important link. Microseismic on-site real-time monitoring can provide real-time fracture geometry, fracture network expansion process, and fracture parameters (length, height, and width), providing an intuitive and accurate basis for real-time adjustment of fr...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01V1/36G01V1/28
CPCG01V1/28G01V1/362
Inventor 王瑜郭全仕
Owner CHINA PETROLEUM & CHEM CORP
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