Seismic facies and sedimentary facies determination method and apparatus

Abstract

The embodiments of the invention provide a seismic facies and sedimentary facies determination method and apparatus. The method includes the following steps: determining the seismic facies of a first testing point of a research area; based on the seismic facies and seismic material of the first measuring point, determining the sedimentary facies and the sand body distribution range of the seismic facies of the first testing point; after determining the sedimentary facies and the sand body distribution range of the seismic facies of the first testing point, picking up one point in the boundary of the seismic facies area of the first testing point as a second testing point, determining the seismic facies of the second testing point, the range area of the seismic facies area, and the sedimentary facies and the sand body distribution range of the seismic facies; based on the sedimentary facies and the sand body distribution range of the seismic facies of the first testing point and the second testing point, determining the sedimentary facies and the sand body distribution range of the research area. According to the embodiments of the invention, the method addresses the problem of inaccurate sedimentary facies type and boundary division in mechanical facies transformation of prior art, and increases the accuracy in determining sedimentary facies.

Description

technical field [0001] The invention relates to the technical field of seismic exploration, in particular to a method and device for determining seismic facies and sedimentary facies. Background technique [0002] At present, oil and gas-bearing basins are dominated by continental basins, among which continental faulted basins are extremely complex in structure, with many provenance directions and depositional types, narrow facies bands, and rapid facies change, making reservoir prediction difficult. Therefore, how to accurately determine its seismic facies, determine its sedimentary facies type, and accurately predict the spatiotemporal distribution of its sand bodies, so as to provide a basis for subsequent reservoir evaluation and identification of oil and gas reservoirs, is an important issue in actual oil and gas exploration. more important content. In particular, most of the oil-gas-bearing basins in continental rift depressions are discovered early, have a high degre...

AI Technical Summary

Problems solved by technology

[0006] In actual application, due to the limitations of the above two types of methods, there are many shortcomings and deficiencies in the actual implementation.

First of all, when the above two types of seismic facies division methods are implemented, most of them focus on how to divide the seismic facies, and then mechanically "transfer" the seismic facies into sedimentary facies. This unified mechanical phase transformation often leads to sedimentary facies. Inaccurate classification of types and boundaries; secondly, the above two types of methods generally use segments or sub-members as the basic stratigraphic unit. , cannot accurately determine the distribution of sand bodies in the sand group; in addition, the first type of method still has a certain degree of subjectivity, and is time-consuming and laborious, while the second type of method has the technical problem of overly cumbersome classification

[0007] For the above technical problems, no effective solution has been proposed yet

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