Method, device and system for determination of effective stress based on three-dimensional seismic data

Abstract

The embodiment of the invention discloses a method, a device and a system for determination of effective stress based on three-dimensional seismic data. The method comprises the steps of: performing elastic parameter inversion for three-dimensional prestack seismic data to obtain elastic parameter data; performing inversion according to core test data and acoustic logging data to obtain construction strain coefficient data; obtaining formation pressure data through inversion of three-dimensional post-stack seismic data; calculating and obtaining thermal stress data according to a coefficient of thermal expansion, a geothermal gradient and the elastic parameter data; and according to the data of elastic parameters, the construction strain coefficient, the formation pressure and the coefficient of thermal expansion, calculating and determining three-dimensional effective stress data of a target area. According to the embodiment of the invention, the method, the device and the system fordetermination of effective stress based on three-dimensional seismic data can provide a new technical means for the quantitative prediction for the three-dimensional geology effective stress space distribution rule and can reduce the risk cost of oil-gas exploration and development.

Description

technical field [0001] The invention relates to the technical field of oil and gas geophysical exploration, in particular to a method, device and system for determining effective stress based on three-dimensional seismic data. Background technique [0002] The effective stress refers to the stress borne by the rock skeleton, which is the most direct factor affecting the strength and deformation of the rock. The change of the effective stress field will cause the deformation of the porous medium of the rock, resulting in the change of the porosity and permeability of the reservoir rock, thus affecting the seepage and production of the reservoir. [0003] The distribution law of 3D effective stress is an important geological basis for the evaluation of unconventional oil and gas engineering sweet spot and the deployment of tight low permeability reservoir development plan. In the past research on reservoir stress, only the stress in the original state before the reservoir was...

AI Technical Summary

Problems solved by technology

In the past research on reservoir stress, only the stress in the original state before the reservoir was exploited was studied, and the effective stress of the reservoir was rarely studied, and there is no quantitative prediction method for the three-dimensional effective stress at present.

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