Seismic reservoir prediction method by cross analysis based on target analysis

Abstract

The invention provides a seismic reservoir prediction method by cross analysis based on target analysis. The method comprises the following steps of: carrying out attribute calculation and back calculation on original seismic data so as to obtain seism preparation data for seism reservoir prediction and preparation data for well measurement; carrying out the cross analysis on well measuring data, thus determining whether a reservoir section on a cross plot of the well measuring data has obvious characteristics; and if so, defining a rational seismic reservoir prediction result according to the scope of parameters obtained from the cross analysis on the well measuring data and the existing data.

Description

technical field [0001] The invention relates to the technical field of geophysical prospecting seismic data interpretation, more specifically, relates to a seismic reservoir prediction method based on intersection analysis based on target analysis, and the seismic reservoir prediction method can be used for reservoir prediction of seismic data interpretation technology. Background technique [0002] In geophysical prospecting technology, after acquiring seismic data through conventional methods, it is necessary to interpret the seismic data, generally requiring reservoir prediction and interpretation process. In the reservoir prediction and interpretation process, it is necessary to analyze the logging data, perform attribute extraction, seismic inversion and other related calculations on the seismic data, and then use various methods (such as intersection analysis, multi-attribute fusion, principal component analysis, etc.) Perform qualitative and quantitative analysis on t...

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Problems solved by technology

[0009] The existing intersection analysis reservoir prediction technology is more effective for simple reservoirs with obvious characteristics, that is, when the reservoir characteristics on the intersection map can be reflected by independent regional response characteristics, and the response characteristic parameter range can be delineated on the intersection map , can delineate the distribution range of characteristic regions on the corresponding seismic attribute data; but for complex reservoirs with no obvious features on the intersection map, this method cannot complete the reservoir prediction work

[0010] In the existing intersection analysis reservoir prediction technology, the direction of analysis is unidirectional. If the reservoir prediction result is not satisfactory, it is necessary to repeatedly try the range of intersection parameters. The operation is relatively blind, and the selection of intersection parameters and the mapping results are not intuitive. Corresponding relationship, which greatly increases the workload of analysis, and it is difficult to get satisfactory results

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