A Method of Searching for Fractured-Vuggy Reservoirs Near Wells Using Multi-trace Accumulated Amplitude Difference Decomposition Spectrum

Abstract

The method for finding fractured-vuggy reservoirs beside wells by accumulating amplitude difference decomposition spectra with multiple seismic traces belongs to the technical field of underground reservoir exploration by seismic technology. Perform data processing and data interpretation on the original seismic data to obtain the three-dimensional data volume after stacking and migration processing and the horizon data picked up by interpretation; starting from the horizon data picked up by seismic interpretation, obtain the target layer data of adjacent seismic traces beside the well ; apply the dynamic waveform matching algorithm to calculate the accumulated amplitude difference between the starting point and the end point of the horizon data picked up by seismic interpretation, and obtain the accumulated amplitude difference curve; the multi-scale decomposition of the accumulated amplitude difference of the dynamic waveform matching is carried out, and a The dynamic accumulation amplitude difference curve is changed into multiple curves; these multi-resolution decomposition curves are converted into time and depth, and analyzed and compared with the reservoirs divided by logging data; research and investigation of seismic attributes with different resolutions and logging data storage The thickness corresponding relationship of stratum evaluation and division can be determined, and then the attribute of seismic lateral tracing can be determined.

Description

technical field [0001] The invention relates to the technical field of exploration of underground reservoirs by using seismic technology, in particular to a method for finding fracture-vug reservoirs beside wells by accumulating amplitude differential spectrum with multiple seismic traces. Background technique [0002] The basic goal of petroleum seismic exploration is to understand the subsurface structure and corresponding formation properties based on the seismic reflection waves excited by artificial seismic sources. The original seismic data are processed through a series of filtering, stacking, and migration to form the corresponding self-excited and self-collecting reflected wave recording data volume. On this basis, combined with the regional geological background, horizon tracing, fault interpretation and reservoir prediction are carried out on the profile drawn according to the data volume, so as to find underground structures and traps that are favorable for oil a...

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Problems solved by technology

[0004] The main purpose of the present invention is to provide a method for finding fractured-vuggy reservoirs beside wells through multi-trace accumulation amplitude difference decomposition spectrum, so as to solve the problem that fracture-vuggy reservoirs cannot be obtained simultaneously in the fracture-vuggy reservoir prediction method in the prior art The problem of vertical and horizontal changes

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