Continental lake basin sedimentation micro-facies plane distribution map compiling method

Abstract

The invention discloses a continental lake basin sedimentation micro-facies plane distribution map compiling method. The method comprises the following steps: 1) five-level sequence framework divisionand sedimentary boundary determination; 2) identification of the sedimentary environment; 3) determination of sediment provenance and range of influence; 4) single well sedimentation micro-facies identification; and 5) sedimentation micro-facies plane mapping. The sedimentation micro-facies spatial distribution characteristic is indicated to be expressed under the scale of the five-level sequenceframework, sedimentation micro-facies identification is faced with the problem of dominant facies selection under the three-level or four-level sequence framework and the sedimentation micro-facies identification result is difficult to be objectively mastered. The geological information expressed by all the data is fully utilized to make good for deficiency, and the key operation steps are quantified so that the standard can be established for concrete operation and the situation of influencing the analysis result because of subjective judgment can be reduced. The mapping process is industrialized, and the compiling work of multiple sedimentation micro-facies maps under the constraint of the five-level sequence framework can be completed within a short period of time through batch statistics and data processing so that seamless connection of the basic research and the production requirements can be realized.

Description

technical field [0001] The invention relates to a method for compiling a planar distribution map, in particular to a method for compiling a planar distribution map of sedimentary microfacies in continental lake basins, and belongs to the technical field of petroleum exploration applications. Background technique [0002] Sedimentary facies map is an important basic support data for target area selection in the process of oil and gas exploration. The distribution characteristics of favorable facies belts can be determined through the plane distribution map of sedimentary facies, and the optimal well location is the basic process of exploration. With the deepening of exploration work, the plane distribution map of the sedimentary system under the third-level and fourth-level sequence frameworks can no longer meet the actual exploration needs, and the drawing of sedimentary microfacies maps under the fifth-level sequence framework has been carried out in key research areas , be...

AI Technical Summary

Problems solved by technology

With the deepening of exploration work, the plane distribution map of the sedimentary system under the third-level and fourth-level sequence frameworks can no longer meet the needs of actual exploration, and the drawing of sedimentary microfacies maps under the fifth-level sequence framework has been carried out in key research areas , because a third-level sequence often contains dozens of five-level sequence units, the workload increases dramatically, and conventional drawing ideas and methods can no longer meet the needs of actual exploration

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