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A Method for Detecting Reef Reservoir Connectivity

A bio-reef and connectivity technology, applied in the field of development and oil exploration, to achieve the effect of improving accuracy, easy implementation, and strong operability

Active Publication Date: 2018-04-10
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This method predicts the planar distribution of reefs, but further research is needed on the spatial distribution characteristics and development laws

Method used

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  • A Method for Detecting Reef Reservoir Connectivity
  • A Method for Detecting Reef Reservoir Connectivity
  • A Method for Detecting Reef Reservoir Connectivity

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Experimental program
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Embodiment

[0066] Taking a certain reef zone in the YB area as an example, the reef reservoir in this area has been finely described in the early stage of the study, and the development range of the reef has been determined. It is considered that a complete reef zone has developed in this area. And on this basis, the YB28 well was arranged. However, in later studies, the inventors realized that there is no unified gas-water interface in the Changxing Formation gas reservoirs, and that different reefs have different gas-water systems, and the overall distribution of water bodies is edge water or bottom water. The drilling results of Well YB28 produced water. , it is difficult to deploy wells in this reef zone, it is necessary to further study the connectivity of each reef body or reef group in this reef zone, through the present invention, the connectivity of this reef zone is further analyzed, it is considered that the reef zone It is composed of 4 reef groups that are not connected to e...

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Abstract

The invention provides a method for detecting the communication of biological reef reservoirs. The method includes 1), determining spectrum widths and main frequency values of target zones; 2), acquiring at least three amplitude spectrum data volumes; 3), determining amplitude spectrum energy division values of the biological reef reservoirs and non-biological reef reservoirs; 4), filtering out the amplitude spectrum data volumes smaller than or equal to the amplitude spectrum energy division values and retaining the amplitude spectrum data volumes larger than the amplitude spectrum energy division values; 5), analyzing the retained amplitude spectrum data volumes, which are higher than the amplitude spectrum energy division values, on sections and planes, judging the communication of biological reefs and / or biological reef clusters and ultimately determining non-communication ranges of the biological reefs and / or the biological reef clusters.

Description

technical field [0001] The invention belongs to the field of petroleum exploration and development, in particular to a method for detecting the connectivity of reef reservoirs. Background technique [0002] Reefs play an important role in carbonate oil and gas fields because of their good storage properties, and their oil and gas resources have always been a valuable asset that has attracted worldwide attention. Since the first reef-type gas reservoir was discovered in the Jiannan Permian system in eastern Sichuan in the 1970s, such reservoirs have been discovered and put into development one after another, and the research on organic reef-type reservoirs has attracted much attention. [0003] In recent decades of research, with the continuous development of seismic technology, research on various methods has been carried out for reef reservoir prediction, including reef facies seismic pattern recognition technology; seismic attribute analysis and optimization technology; N...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01V1/30
Inventor 刘国萍游瑜春冯琼
Owner CHINA PETROLEUM & CHEM CORP
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