Thin sand body plane distribution prediction method based on fractional order Hilbert transform

Abstract

The invention discloses a thin sand body plane distribution prediction method based on fractional order Hilbert transform. The thin sand body plane distribution prediction method comprises the following steps: firstly, calculating fractional order Hilbert transform of three-dimensional seismic data of 10 orders; and dividing the sand body development section into a plurality of sand body development small layer sections in the longitudinal direction, extracting an attribute plane graph of each sand body development small layer section, and optimizing an amplitude attribute plane graph corresponding to the optimal order based on the development condition of the actual drilling well in each sand body development small layer section to perform thin sand body plane distribution prediction. Thethin sand body plane distribution prediction method makes full use of the advantages that fractional order Hilbert transform can improve the longitudinal resolution, can realize perfect correspondence of the event and the acoustic logging curve on the seismic profile, effectively predicts the plane distribution characteristics of the thin sand body, and improves the accuracy of the plane distribution prediction of the thin sand body.

Description

Technical field [0001] The invention relates to the technical field of oil and gas field exploration, in particular to a method for predicting the plane distribution of thin sand bodies based on fractional Hilbert transform. Background technique [0002] The importance of thin sand body prediction: conventional oil and gas exploration reservoirs are mainly sand bodies. With the continuous deepening of exploration in recent years, it has become more difficult to exploit thick sand bodies and the degree of water flooding has become higher and higher. Thin sand bodies have become the current key targets for oil and gas exploration. They are mainly developed at the end of river-delta deposits, mainly at the end of delta distributary plain and inner front. The skeleton sand bodies are composed of small distributary channel sand bodies and underwater channel deposits. the Lord. At present, the academic circles generally define sand bodies with a thickness of less than 5 meters as thin...

AI Technical Summary

Problems solved by technology

[0005] Disadvantages of the conventional Hilbert transform method: using the Hilbert transform phase shift method of 900, the polarity can be used to indicate the lithology, and the seismic data processed by the 900 phase wavelet can overcome the deficiency of the zero phase wavelet data

There is no research on thin sand body prediction based on fractional Hilbert transform

Images