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Method for quantitatively evaluating 3D seismic attribute reservoir parameter prediction effectiveness

A reservoir parameter, three-dimensional seismic technology, applied in seismology, seismic signal processing, measurement devices, etc., can solve the problems of quantitative evaluation of parameters that cannot be predicted in reservoirs, and the dependence of seismic attributes on human subjective experience, so as to reduce the risk of new drilling. Effect

Active Publication Date: 2018-04-10
中国石油化工股份有限公司华北油气分公司勘探开发研究院 +1
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Problems solved by technology

[0004] The purpose of the present invention is to provide a method for quantitatively evaluating the effectiveness of three-dimensional seismic attributes to predict reservoir parameters, thereby solving the problem that the selection of existing seismic attributes relies too much on human subjective experience and cannot quantitatively evaluate reservoir prediction parameters

Method used

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  • Method for quantitatively evaluating 3D seismic attribute reservoir parameter prediction effectiveness
  • Method for quantitatively evaluating 3D seismic attribute reservoir parameter prediction effectiveness
  • Method for quantitatively evaluating 3D seismic attribute reservoir parameter prediction effectiveness

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Embodiment

[0026] The implementation flow chart of the method for quantitatively evaluating the effectiveness of 3D seismic attributes to predict reservoir parameters in this embodiment is as follows figure 1 As shown, taking a certain area as an example, the area has a three-dimensional seismic area of ​​about 500 square kilometers, mainly sandstone reservoirs deposited by alluvial fans and braided rivers, and 42 wells have been drilled, all of which have drilled through the target interval. The method specifically includes the following steps:

[0027] 1) Carry out standardization processing for completed wells in the area, and carry out well seismic time and depth calibration, respectively count the seismic time scale ranges corresponding to the reservoirs in the target intervals of 42 wells, and determine the time window for attribute extraction;

[0028] 2) According to the time window determined in step 1), extract the 3D seismic instantaneous amplitude, instantaneous frequency and...

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Abstract

The invention relates to a method for quantitatively evaluating 3D seismic attribute reservoir parameter prediction effectiveness. The method comprises the following steps: according to the well-seismic time-depth calibration result, extracting same-algorithm and different-type seismic attributes and attribute values of drilled well coordinates; combined with reservoir parameters formed based on reservoir identification standard, establishing a cross-plot pattern and carrying out linear fitting to determine a correlation coefficient, and preferably selecting an effective seismic attribute typeaccording to the correlation coefficient; on the basis of making clear the effective seismic attribute type, extracting same-type and different-algorithm seismic attributes and attribute values of drilled well coordinates; establishing linear fitting relationship with the reservoir parameters again; and taking the correlation coefficient as basis for quantitative evaluation of seismic attribute reservoir parameter prediction effectiveness. The method, through two intersection fitting, makes clear the optimal attribute type and a corresponding optimal calculation method as the basis for quantitative evaluation of 3D seismic attribute prediction effectiveness, thereby reducing later risk of new drilling deployment.

Description

technical field [0001] The invention belongs to the technical field of three-dimensional seismic reservoir prediction, and in particular relates to a method for quantitatively evaluating the effectiveness of three-dimensional seismic attribute prediction reservoir parameters. Background technique [0002] In the process of oil and gas exploration and development, it is usually necessary to clarify the spatial distribution characteristics of reservoirs and the distribution of favorable target areas with the help of drilling and seismic reflection wave amplitude, frequency, phase and other information of the target interval. At present, when using seismic attributes for reservoir prediction, the usual practice is to calibrate the synthetic records based on drilling and 3D seismic, clarify the seismic time range (time window) corresponding to the reservoir, and then extract multiple seismic attributes within the time window , to form a plane distribution map of seismic attribut...

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Application Information

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IPC IPC(8): G01V1/30G01V1/28
CPCG01V1/28G01V1/306G01V2210/61G01V2210/6169G01V2210/624
Inventor 秦雪霏王国壮孙晓归平军孙涵静李灿苏程
Owner 中国石油化工股份有限公司华北油气分公司勘探开发研究院
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