Sand body plane shape determining method and system thereof

Abstract

The invention provides a sand body plane shape determining method and a system thereof. The sand body plane shape determining method comprises the steps of determining thickness of a growth layer segment of a construction type sedimentarystructure according to the thickness of trough cross bedding, the thickness of plate cross bedding, the thickness of an erosion surface and retention conglomerate, the thickness of a parallel layer, the thickness of water ripple cross bedding, the thickness of a first thin-layer mudstone and the thickness of a coal layer; determining the thickness of the growth layer segment of a reconstruction type sedimentarystructure according to the thickness of a flushing cross bedding, the thickness of water ripple cross bedding and the thickness of wavemark; obtaining the distribution frequency of the construction type sedimentary structure or the reconstruction type sedimentary structure according to the thickness of the growth layer segment of the constructiontype sedimentary structure and the thickness of the growth layer segment of the reconstruction type sedimentary structure; and determining the sand body plane shape according to the distribution frequency of the construction type sedimentary structure or the distribution frequency of the reconstruction type sedimentary structure. The method and the system have advantages of accurately determiningthe sand body plane shape, improving reservoir prediction precision, improving well drilling success rate and exploration success rate, and satisfying a requirement for high-efficiency exploration.

Description

technical field [0001] The invention relates to the technical field of geological research, in particular to a method and system for determining the plane shape of a sand body. Background technique [0002] The plane shape of sand bodies is directly related to the area of ​​oil and gas reservoirs, the size of reserves, and the deployment plan of wells. Whether the plane shape of underground reservoir sand bodies can be accurately defined is crucial to improving the drilling success rate and exploration effectiveness. [0003] At present, the technology for determining the planar shape of sand bodies is mainly based on indirect evidence such as seismic attribute slices, seismic inversion of sand and mudstone distribution, and the subjective knowledge of researchers to determine the planar shape of sand bodies. Reservoir prediction accuracy and exploration success rate are low, and drilling fails, which cannot meet the needs of efficient exploration. Contents of the inventio...

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Problems solved by technology

[0003] At present, the technology for determining the planar shape of sand bodies is mainly based on indirect evidence such as seismic attribute slices, seismic inversion of sandstone and mudstone distribution, and the subjective knowledge of researchers to determine the planar shape of sand bodies. Reservoir prediction accuracy and exploration success rate are low, and drilling fails, which cannot meet the needs of efficient exploration

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