Identification method for single sand body of reservoir

Abstract

The invention relates to an identification method for a single sand body of a reservoir. The identification method comprises the following steps: 1) selecting a plurality of standard wells; 2) performing fractal reconstruction on the logging curve of each standard well to obtain a fractal reconstruction curve; 3) determining a single-sand-body identification fractal curve of each standard well, and removing non-conforming feature points on the single-sand-body identification fractal curve to obtain a single-sand-body fine identification fractal curve; 4) determining the type of a sensitive logging curve; and 5) determining a single-sand-body identification fractal curve of a non-standard well, comparing the single-sand-body identification fractal curve with the logging curve of the well, carrying out correcting, removing an error interface, and identifying the single sand body of the non-standard well. According to the identification method for the single sand body of the reservoir provided by the invention, the response intensity of logging data information to lithologic changes is amplified through a fractal reconstruction method, the defect of low precision of identifying the single sand body of the reservoir only by utilizing the logging curve is overcome, the identification of the single sand body is simpler and more convenient, and description is finer.

Description

technical field [0001] The invention belongs to the field of petroleum exploration and development, and in particular relates to a method for identifying a single sand body in a reservoir. Background technique [0002] Fluvial sedimentary reservoirs are the main reservoir type, and their oil and gas reserves have accounted for about 65% of the producing reserves of oil and gas fields in my country. With the continuous development of such oil and gas fields, oil and gas resources and reserves are decreasing day by day, and the distribution of remaining oil and gas is more scattered. It is more and more difficult to tap the potential. Unclear inter-well sand body connectivity and unpredictable distribution of physical properties caused by reservoir heterogeneity restrict the tapping of the remaining oil and gas potential and the efficient development of oil and gas fields. [0003] The effect of remaining oil and gas potential tapping prediction depends to a large extent on th...

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to provide an identification method for a single sand body in a reservoir to solve the problem of low identification accuracy of a single sand body in existing identification methods

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