Rapid seismic random inversion method based on horizontal constraint

A stochastic inversion and horizontal technology, applied in the field of exploration geophysics, can solve problems such as inability to effectively reflect the geological characteristics of underground reservoirs, poor horizontal continuity, and low calculation efficiency, and achieve enhanced horizontal continuity, high vertical resolution, and horizontal good continuity effect
CN108318921AActive Publication Date: 2018-07-24CHINA UNIV OF PETROLEUM (EAST CHINA)
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Patent Information

Authority / Receiving Office
CN Β· China
Patent Type
Applications(China)
Current Assignee / Owner
CHINA UNIV OF PETROLEUM (EAST CHINA)
Publication Date
2018-07-24

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Abstract

The invention discloses a rapid seismic random inversion method based on the horizontal constraint. The method comprises the steps of performing spatial structure analysis on the well data to obtain the variation function, solving the target interval horizontal correlation function, non-conditional simulation implementation, conditional processing and disturbance optimization for obtaining the optimal solution. The problems that the horizontal continuity of conventional random inversion is poor, the geological characteristics of the underground reservoirs cannot be effectively reflected, the operation speed is slow and the calculation efficiency is low can be solved. The horizontal correlation function is added in the covariance function of conventional calculation to act as the constraint, and random inversion is realized by using fast Fourier sliding mean spectral simulation with combination of the progressive deformation update method so that the inversion result is enabled to achieve the effect of high longitudinal resolution and great horizontal continuity. Compared with the conventional random inversion, the horizontal continuity of the inversion result can be enhanced, the calculation efficiency can be enhanced and the method plays an important role in subsequent reservoir identification and oil reservoir description.
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Description

technical field

[0001] The invention belongs to the field of exploration geophysics, in particular to a fast seismic random inversion method based on lateral constraints. Background technique

[0002] Seismic inversion can be divided into two categories: deterministic inversion and stochastic inversion. Deterministic inversion uses seismic data as conditional data, and the inversion solution given has uniqueness and smoothness. Its advantages are small amount of calculation and fast calculation speed. It is characterized by taking well logging data as hard data and using seismic data as constraints, making full use of high-frequency information in well logging data, and using variogram to simulate randomly to obtain multiple simulation realizations, and it is compatible with seismic inversion Combining multiple inversion solutions and making a reasonable estimate of the uncertainty of the inversion results at the same time, it has the advantage of being able to simulate inf...

Claims

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