Seismic-data-based thin layer automatic interpretation and thickness prediction method and device

Abstract

The embodiment of the invention discloses a seismic-data-based thin layer automatic interpretation and thickness prediction method and a seismic-data-based thin layer automatic interpretation and thickness prediction device. The method comprises the following steps of: acquiring seismic data, processing the seismic data to acquire superposed seismic data, determining a target layer which corresponds to the thin layer, and extracting seismic wavelets; preliminarily interpreting the top or the bottom of the thin layer, and determining an automatic tracking time window [t-T1, t+T2] of the thin layer; for each channel of the seismic data of the superposed seismic data, intercepting the current seismic channel data according to the automatic tracking time window of the thin layer in the current seismic channel, and recording the intercepted seismic channel data to be f; setting N reflection coefficient position modes, and uniquely determining each reflection coefficient position mode according to a matrix Hi=[hi1, hi2, ..., and hiMi], wherein i is equal to 1,2, ..., and N; acquiring the optimized reflection coefficient amplitude combination ai and the optimized synthesized seismic record fi which correspond to each reflection coefficient position mode; acquiring the optimized reflection coefficient position mode Hi; acquiring the automatic interpretation time tup and tdown on the top or at the bottom of the thin layer; and acquiring the time thickness delta t of the thin layer according to the tup and tdown. By the method, the top and bottom of the thin layer can be interpreted, and the interpretation precision is high.

Description

technical field [0001] The invention relates to a geophysical prospecting method, in particular to a thin layer automatic interpretation and thickness prediction method and device based on seismic data. Background technique [0002] Seismic data is to excite an artificial seismic source on the surface, and the vibration caused by the seismic source propagates underground in the form of seismic waves, and under certain conditions, it is reflected upwards and sent back to the surface, and then the reflected seismic waves are recorded by surface instruments (receivers). resulting in seismic records. Seismic exploration refers to the targeted acquisition, processing, and interpretation of seismic data to realize the exploration of geological targets such as underground oil and gas resources. [0003] With the deepening of oil and gas exploration, there are fewer and fewer easily identifiable structural oil and gas reservoirs, and traps with thin reservoirs and strong concealmen...

AI Technical Summary

Problems solved by technology

To sum up, most of the existing thin-bed interpretation methods have the following deficiencies: ①Seismic wavelets are too idealized; ②Only consider the problem of a single thin-bed; , the specific position of the bottom

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