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Pre-stack crack prediction method for contiguous data

A fracture prediction and data technology, which is applied in the field of oil and gas exploration and development, can solve the pre-stack fracture prediction of difficult-to-connect data, cannot eliminate the differences in azimuth, offset and coverage times, and does not consider the multi-block offset. , coverage times, azimuth distribution inconsistency, etc., to avoid spatial aliasing and achieve the effect of consistent correction

Active Publication Date: 2018-11-13
CHINA PETROLEUM & CHEM CORP +1
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Problems solved by technology

Although the current contiguous processing technology can effectively eliminate inconsistency problems such as wavelet, amplitude (energy), frequency, and phase in multiple blocks by using advanced consistency processing technology, which basically meets the needs of subsequent oil and gas reservoir interpretation, but these The technology cannot eliminate the differences in the distribution of azimuths, offsets and coverage times caused by different observing systems
The impact of different acquisition parameters on pre-stack fracture prediction still exists after contiguous processing, which needs to be solved by subsequent fracture prediction technology. However, the existing technology does not consider the offset distance, coverage times, and azimuth angle distribution between multiple blocks. Therefore, it is difficult to apply to the pre-stack fracture prediction of continuous data

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  • Pre-stack crack prediction method for contiguous data

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Embodiment Construction

[0038] The present invention will be further described below in conjunction with accompanying drawing.

[0039] figure 1 It is a flow chart of a pre-stack fracture prediction method for contiguous data in an embodiment of the present invention; figure 1 As shown, the present invention provides a pre-stack fracture prediction method for contiguous data with different acquisition parameters. The method includes: the first step, analyzing the contiguous data, including analyzing the azimuth and offset of each block, In this way, the effective azimuth angle range and the uniform distribution range of offsets can be obtained; in the second step, on the premise of ensuring uniform offset distribution, the azimuth angle gather data is divided, and the method of bin dynamic averaging is used to make The coverage times of the azimuth gathers in different blocks are consistent; in the third step, for the above-mentioned azimuth gathers with uniform offset distribution and consistent co...

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Abstract

The invention relates to a pre-stack crack prediction method for contiguous data, relates to the technical field of oil and gas exploration and development, and solves a technical problem in the priorart that pre-stack crack prediction in contiguous data of different acquisition parameters is difficult. The method comprises steps of analyzing the contiguous data with inconsistent acquisition parameters among different blocks, to obtain gather data; dividing gathers of each block to make the number of times of gather in different blocks consistent; extracting orientation properties, to obtaina crack relative density body, and performing consistency correction on the crack density body of the plurality of blocks. Through using the above method, a technical effect of contiguous depiction ofcracks can be achieved aimed at the contiguous data of different acquisition parameters.

Description

technical field [0001] The invention relates to the technical field of oil and gas exploration and development, in particular to a pre-stack fracture prediction method for continuous data. Background technique [0002] In the early and mid-term of exploration, each oilfield in the same large structural block used different observation systems to collect multiple small block data at different periods according to different exploration targets. Block data cannot fully meet the research needs. At present, in order to meet the needs of overall exploration and development deployment, integrating multiple adjacent small-scale seismic survey areas to form regional large-scale 3D seismic exploration has gradually become the key direction of future seismic exploration. At the same time, the proportion of fractured oil and gas reservoirs in newly proven oil and gas reserves is increasing, highlighting the importance of fracture prediction based on seismic continuous data. [0003] S...

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Application Information

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IPC IPC(8): G01V1/30G01V1/36
CPCG01V1/306G01V1/362G01V2210/52G01V2210/646
Inventor 魏水建王丹贾跃玮王鹏
Owner CHINA PETROLEUM & CHEM CORP
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