Glutenite sedimentary facies seismic prediction method based on complete ensemble empirical mode decomposition

Abstract

The invention discloses a glutenite sedimentary facies seismic prediction method based on complete ensemble empirical mode decomposition. The method comprises the following steps that: S1: aiming at apost-stack three-dimensional seismic data volume, adopting a complete ensemble empirical mode decomposition method to decompose the seismic data into a plurality of natural mode function components;S2: adopting a reconfiguration algorithm to obtain each mode function component with certain frequency ingredients; S3: carrying out protection construction smooth filtering on each mode function component obtained by reconstruction in a time-space domain; S4: carrying out horizon seismic attribute extraction algorithm researching, and establishing a glutenite seismic facies identification mark; and S5: constructing a glutenite seismic facies sensitive characteristic parameter to realize glutenite sedimentary facies seismic prediction. By use of the glutenite sedimentary facies seismic prediction method based on the complete ensemble empirical mode decomposition, the inherent rich information of the seismic data is used, and a glutenite sedimentary facies prediction ability is improved.

Description

technical field [0001] The invention relates to the field of geological exploration and development of glutenite seismic identification and prediction, in particular to a glutenite sedimentary facies seismic prediction method based on complete overall empirical mode decomposition. Background technique [0002] Glutenite reservoirs are very complex, with large differences in reservoir physical properties, oil content and productivity, making efficient exploration and development difficult. For example, Well Daxie 722 in the Taoerhe area of ​​the Chengnan fault zone saw good industrial oil flow in the Lower Sha 3, but then in Well Da 722-1 drilled in its northeast, the reservoir thinned rapidly and its physical properties deteriorated lead to failure. According to the analysis, the drastic vertical and horizontal changes of glutenite sedimentary sub-(micro) facies lead to strong heterogeneity of reservoirs and large differences in productivity. The key to glutenite reservoir...

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Problems solved by technology

[0009] (1) The sedimentary sub-(micro) facies of glutenite have small differences in well logging and various petrophysical parameters, and there is a lack of fine facies belt identification and division standards

[0010] (2) The seismic response characteristics of various sedimentary sub (micro) facies of glutenite are unclear, and the differences in sensitive characteristic parameters are unclear

[0011] (3) Seismic prediction technology for sedimentary sub-(micro) facies is lacking

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