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A stratigraphic slicing method based on multi-wave data

A technique of stratigraphic slice and multi-wave data, which is applied in the field of petroleum geophysical exploration and can solve the problem of unsuitability of formation slice.

Active Publication Date: 2017-10-27
PETROCHINA CO LTD
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Problems solved by technology

[0004] In order to solve the problem that stratigraphic slices based on 90-degree phase shift data and post-stack inversion data are not suitable for areas such as complex lithology areas and tight oil and gas areas, the present invention provides a stratum slice method based on multi-wave data. The application of wave data to seismic sedimentology research can effectively overcome the shortcomings of existing technologies and improve the applicability of stratigraphic slices in different regions

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  • A stratigraphic slicing method based on multi-wave data
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  • A stratigraphic slicing method based on multi-wave data

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Embodiment Construction

[0016] The technical means adopted by the present invention to achieve the intended invention purpose are further described below in conjunction with the drawings and preferred embodiments of the present invention.

[0017] figure 1 It is a flowchart of a stratum slice method based on multi-wave data according to an embodiment of the present invention. Such as figure 1 As shown, the method includes:

[0018] Step 1, performing amplitude-preserving processing on seismic data including PP waves and PS waves, and obtaining PP (longitudinal wave) wavelength offset data and PS (converted wave) wavelength offset data of the prestack gather;

[0019] Step 2, combining the full wave train logging data, according to the joint simultaneous inversion method of the PP wavelength division offset data and the PS wavelength division offset data to obtain at least the compressional wave impedance, shear wave impedance, and Poisson's ratio Elastic parameter body;

[0020] Step 3, under the...

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Abstract

The invention provides a stratum slicing method based on multi-wave data. The method comprises the steps that 1) the amplitude of PP wave and PS wave earthquake data is preserved; and PP wavelength division offset data and PS wavelength division offset data of pre-stack gather are obtained; 2) full-waveform logging data is combined, and the PP wavelength division offset data and PS wavelength division offset data are combined with a simultaneous inversion method to obtain elastic parameters including the vertical wave impedance, the horizontal wave impedance and the Poisson's ratio at least; 3) the PP wavelength division offset data is tracked under control of isochronism analysis to obtain an isochronisms marker layer; 4) the elastic parameters are converted to obtain geological ages; and 5) the stratum is sliced in a proportion-equivalent interpolation manner among the isochronisms marker layers according to the geological ages stratum slices approximate to age stratum meanings are obtained, and the plane phases of the stratum slices are interpreted to reflect the deposition characteristic of sand group scales and recover the evolution process of deposition.

Description

technical field [0001] The invention relates to the field of petroleum geophysical prospecting, in particular to a stratum slicing method based on multi-wave data. Background technique [0002] At present, seismic sedimentology is a new discipline after seismic stratigraphy and sequence stratigraphy. Scholars at home and abroad have carried out extensive research in recent years. In a nutshell, seismic sedimentology is a discipline that mainly uses seismic information and techniques to study sedimentary rocks and their formation processes. Specifically, it focuses on the study of seismic petrology, seismic geomorphology, sedimentary structure, sedimentary history, sedimentary system, and plane distribution of sedimentary facies (Zeng Hongliu, Zhu Xiaomin, Zhu Rukai, etc., Standards for Seismic Sedimentology of Continental Depressed Basins , Petroleum Exploration and Development, 2012, 39(3): 275-284; Dong Chunmei, Zhang Xianguo, Lin Chengyan, Discussion on Several Issues o...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01V1/30
CPCG01V1/30
Inventor 窦玉坛
Owner PETROCHINA CO LTD