Depth domain stratal configuration inversion method based on geological information mapping

Abstract

The invention provides a depth domain stratal configuration inversion method based on geological information mapping. The method comprises steps of inputting a prestack depth migration seismic data volume; inputting logging data and interpretation horizon; establishing a speed model and extracting a depth domain wavelet; making a depth domain synthetic record and conducting horizon calibration; establishing a reasonable construction frame geological model; establishing a depth deviation obligatory point based on the geological model; and adopting a rapid threshold convergence iterative algorithm to achieve basis pursuit stratal configuration inversion based on geological information mapping. The depth domain stratal configuration inversion method based on geological information mapping can obtain a data volume of directly representing vertical and horizontal change of a geological body by means of seismic data of the depth domain, overcomes high frequency information loss caused by resampling in the logging curve time-depth conversion process, effectively ensures high resolution of seismic inversion, and finally achieves an object of directly predicting reservoir lithology, physical properties and oil-gas possibility by means of depth domain data.

Description

technical field [0001] The invention relates to the technical field of oil field development, in particular to a depth-domain formation structure inversion method based on geological information mapping. Background technique [0002] The inversion of seismic parameters in time domain started in the early 1900s and became popular in the 1980s. In the early stage, it was mainly common inverse regression method (such as VELOG, SEISLOG, etc.) and sparse pulse method (such as MED, AR, MLD, BED, etc.). The resolution of inversion results is directly limited by the frequency bandwidth of seismic data. From the late 1980s to the early 1990s, a combination of seismic, logging and geology appeared, based on convolution models and geological models, using linear and generalized linear inversion methods. It is called "model inversion method" (such as HGS's BCI, Russia's PARM, CGG's PROVIM, etc.). The resolution of drilling results is affected by the combination of seismic resolution a...

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Problems solved by technology

[0006] However, the above studies did not solve the problems of depth mismatch in the conversion from depth domain to time domain and time-depth conversion in the inversion process.

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