Seismic sedimentology interpretation method based on frequency-scale matching

Abstract

The invention discloses a seismic sedimentology interpretation method based on frequency-scale matching, and belongs to the field of petroleum exploration and development. The seismic sedimentology interpretation method comprises the following steps: (1) loading post-stack seismic data, (2) carrying out phase switching, obtaining a phase seismic data body with the angle of 90 degrees, (3) confirming the average thickness of a main exploration target sand body according to well-point analysis, (4) confirming the tuning frequency of the target sand body, (5) processing the seismic data in a fractional frequency mode, obtaining a fractional frequency seismic data body reflecting the target sand body, (6) manufacturing strata slices of the fractional frequency data body, (7) interpreting the strata slices, obtaining plane distribution and evolution of the target sand body, (8) when sand bodies with various thickness levels exist, carrying out operations on the sand body at each level according to the step (4) to the step (7), (9) combining the interpretation results of the slices with the same depth of various fractional frequency bodies, and interpreting characteristics and evolution of research area sedimentary microfacies. The seismic sedimentology interpretation method based on the frequency-scale matching is used for interpretation of the thin-layer sedimentary characteristics under a seism vertical resolution ratio, remarkably improves thin-layer sedimentary seismic interpretation accuracy and is wide in application prospect.

Description

technical field [0001] The invention relates to the geological field of petroleum exploration and development, and relates to a seismic sedimentology interpretation method and technical process. Background technique [0002] With the continuous deepening of oil reservoir exploration and development, the distribution prediction of narrow and thin sand bodies is becoming more and more important in the geological research of oil and gas exploration and development, and the study of sedimentary microfacies and its evolution is the basis of sand body distribution prediction and fine characterization The key content is the connecting point of sand body genesis and distribution prediction. No matter in the exploration stage or in the reservoir development stage, the distribution and vertical evolution of sedimentary microfacies between wells are the difficulties in the study of oil and gas geology. Since the 1990s, the development of applied geophysical techniques has provided eff...

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Problems solved by technology

[0008] However, the current research on seismic sedimentology is still in its infancy, and there is a lack of operable seismic sedimentology interpretation methods and technical processes. How to carry out seismic sedimentology interpretation work in the actual research area is the current petroleum geology researcher who uses seismic data to study sedimentary facies. The main problems encountered in its evolution restrict the application of seismic sedimentology technology in the actual production research of oilfields

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