Conversion method and apparatus of lithologic data volumes

Abstract

The invention provides a conversion method and apparatus of lithologic data volumes, and relates to the technical field of earthquake sedimentology. The method comprises the following steps: obtaining first post-stack seismic data volumes, and performing phase estimation and correction on the first post-stack seismic data volumes to generate first zero-phase post-stack seismic data volumes; performing resampling on the first zero-phase post-stack seismic data volumes at a first preset sampling rate to form second zero-phase post-stack seismic data volumes; performing reflection coefficient inversion on the second zero-phase post-stack seismic data volumes to form broadband seismic data volumes; performing phase estimation and correction on the broadband seismic data volumes to generate third zero-phase post-stack seismic data volumes; and through a colored inversion method, performing lithologic data volume conversion on the third zero-phase post-stack seismic data volumes to generate the lithologic data volumes. According to the invention, the problem of difficulty in converting the seismic data volumes into the lithologic data volumes due to incapability of realization of a lithology distinguishing function simply by use of a 90-degree phase conversion technology in the prior art can be solved.

Description

Technical field [0001] The invention relates to the technical field of seismic sedimentology, in particular to a method and device for converting a lithological data volume in seismic sedimentology. Background technique [0002] At present, seismic sedimentology is a new method of fine oil and gas exploration developed in recent years. It is based on high-precision three-dimensional seismic data, using fine sedimentology models, combined with geophysical techniques, to analyze the distribution characteristics and evolution of sedimentary systems An emerging discipline for fine research; it is the inheritance and development of seismic stratigraphy, sequence stratigraphy and high-resolution sequence stratigraphy. Of course, due to the limitations of seismic resolution and research methods, seismic sedimentology has not yet formed a systematic theoretical system. Although the use of earthquakes to identify sedimentary facies and stratigraphic lithology has been widely carried out i...

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Problems solved by technology

[0004] Embodiments of the present invention provide a method and device for converting a lithology data volume to solve the problem that in the prior art, the function of distinguishing lithology cannot be achieved simply through the 90° phase conversion technology, and it is difficult to convert a seismic data volume into a lithology data volume. data body problem

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