Oil reservoir reconstruction microseism event scatter clustering analysis method and system

A cluster analysis and micro-seismic technology, applied in seismology, seismic signal processing, geophysical measurement, etc., can solve problems such as source vector angle error, low reliability of micro-seismic monitoring results, unsatisfactory temporal and spatial distribution of geophones, etc. To achieve the effect of improving reliability

Active Publication Date: 2020-05-15
CHINA PETROLEUM & CHEM CORP +1
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Problems solved by technology

At present, due to problems such as the first arrival time error of the longitudinal wave (P wave) or shear wave (S wave) of the microseismic event, the uncertainty of the velocity model, the error of the source vector angle, and the unsatisfactory spatial and temporal distribution of the geophone, the microseismic monitoring results are inconsistent. Low reliability, large error, and the divergence of microseismic event points, it is difficult to effectively extract the skeleton structure of artificial fractures in reservoir stimulation, which restricts the popularization and application of microseismic monitoring technology in unconventional oil and gas exploration and development

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  • Oil reservoir reconstruction microseism event scatter clustering analysis method and system
  • Oil reservoir reconstruction microseism event scatter clustering analysis method and system
  • Oil reservoir reconstruction microseism event scatter clustering analysis method and system

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[0028] 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.

[0029] like figure 1 as shown, figure 1 It is a flowchart of the scatter-point clustering analysis method for reservoir stimulation microseismic events of the present invention.

[0030] In step 101, the scattered points of microseismic events of reservoir stimulation are obtained in real time. The microseismic events are obtained through the positioning of multiple geophones recorded in the well or on the ground, including the occurrence time, spatial location and source parameter information of the microseismic events. .

[0031] Reservoir stimulation over a period of time will generate dozens or hundreds of microseismic events, which are distributed within the stimulated formation. The occurrence time of microseismic events can reflect the openin...

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Abstract

The invention provides an oil reservoir reconstruction microseism event scatter clustering analysis method and system. The method comprises: 1, acquiring oil reservoir reconstruction microseism eventscatter in real time; 2, calculating error ellipses of all microseism events; 3, performing weighting operation according to the moment magnitude of the microseism event; 4, calculating the geometriccenter of the microseism event in the range of the error ellipse; and 5, minimizing the target function through continuous iteration, and carrying out accurate description and fine description of theoil reservoir reconstruction artificial fracture. According to the oil reservoir reconstruction micro-seismic event scatter clustering analysis method and system, the oil reservoir reconstruction effect can be effectively evaluated, optimization and perfection of the reconstruction process are guided, and the method and system play an important role in efficient exploration and development of unconventional oil and gas resources.

Description

technical field [0001] The invention relates to the technical field of microseismic monitoring for oil and gas reservoir reformation, in particular to a method and system for scatter-point clustering analysis of microseismic events for reservoir reformation. Background technique [0002] Reservoir stimulation operations such as hydraulic fracturing, water injection, gas injection, and heavy oil thermal recovery will induce microseismic events, and these microseismic activities have an important impact on the exploration and development of unconventional oil and gas fields. In order to effectively evaluate and optimize oil and gas stimulation measures, it is necessary to quickly and timely grasp the effect of reservoir stimulation, so as to optimize the process technology and stimulation parameters. Microseismic monitoring is one of the most effective technologies to evaluate the effect of reservoir stimulation. At present, due to problems such as the first arrival time error...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01V1/28
CPCG01V1/288
Inventor 刁瑞尚新民张云银芮拥军隆文韬柳光华揭景荣
Owner CHINA PETROLEUM & CHEM CORP
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