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Carving method of fault-karst rock mass of carbonate rock

A carbonate rock and solution technology, applied in measurement devices, instruments, scientific instruments, etc., can solve the problems of inability to characterize the degree of fragmentation, inability to simultaneously characterize reservoirs and fracture shapes, and inability to characterize reservoirs, so as to improve prediction. effect of ability

Inactive Publication Date: 2017-11-21
CHINA PETROLEUM & CHEM CORP
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Problems solved by technology

However, it is impossible to characterize the degree of fragmentation of the fracture;
[0007] (4) Using tensor attributes (Li Yi et al., Application of Gradient Structure Tensor Analysis Method in the Prediction of Channel Sand Body from 3D Seismic Data, Natural Gas Industry, 2011), calculate the discontinuity of underground space, and combine with the above-hole data to make fractures Fragmentation zone characterization, but not reservoir characterization
The above methods all characterize the carbonate reservoirs from different aspects, but none of the techniques can characterize the reservoirs and faults at the same time

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  • Carving method of fault-karst rock mass of carbonate rock
  • Carving method of fault-karst rock mass of carbonate rock
  • Carving method of fault-karst rock mass of carbonate rock

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[0032] Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited by the embodiments set forth herein. Rather, these embodiments are provided for more thorough understanding of the present disclosure and to fully convey the scope of the present disclosure to those skilled in the art.

[0033] figure 1 A flowchart showing a method for describing a carbonate fault-karst body according to the present invention, the method includes the following steps:

[0034] Step S101: Post-stack inversion is performed on the seismic data to obtain subsurface wave impedance data, the purpose of which is to characterize the reservoir body of the carbonate rock fault-karst body.

[0035] Optionally, post-stack inversion of the seis...

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Abstract

The invention discloses a carving method of the fault-karst rock mass of the carbonate rock. The method comprises steps of carrying out post-stack inversion on seismic data to obtain underground wave impedance data; calculating ant attributes of the seismic data; determining an ant attribute threshold representing fracture growth, and according to the ant attribute threshold, carrying out hollowing carving processing on the ant attribute threshold; and by taking the underground wave impedance data as background data, superposing the ant attribute threshold subjected to the hollowing carving processing on the underground wave impedance data, thereby achieving carving of a reservoir body and the fractures. According to the invention, the method is capable of helping oil reservoir geological workers to quite clearly know the underground oil reservoir distribution and filling paths, and data basis is provided for following well position deployment and oil reservoir modeling.

Description

technical field [0001] The invention relates to a development seismic method in oil reservoir development, in particular to a method for describing carbonate rock fault-karst body. Background technique [0002] The storage space of fault-karst reservoirs is dominated by large caves or dissolved pores and caves. Due to the influence of karst water and fault development characteristics, the internal structure of fault-karst reservoirs is extremely complex, and the vertical and horizontal heterogeneity of storage space is extremely strong. In addition, reservoir development shows that wells deployed away from faults often have poor productivity, even if the reservoir body is well developed, affected by the reservoir charging path. Therefore, the characterization of fault-karst reservoirs requires simultaneous characterization of reservoirs and faults. [0003] The current fault-karst reservoir characterization methods are mainly divided into the following categories: [0004]...

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Application Information

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IPC IPC(8): G01V1/30
CPCG01V1/307G01V2210/63G01V2210/641G01V2210/645
Inventor 邓光校刘韬丁维文欢杨德斌
Owner CHINA PETROLEUM & CHEM CORP
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