Shale oil and gas reservoir seismic reservoir prediction method

Abstract

The invention relates to a shale oil and gas reservoir seismic reservoir prediction method. the method comprises steps: 1) logging data are used, and petrophysical parameters are calculated and obtained; 2) intersection analysis is carried out on the petrophysical parameters , and effective parameters are selected; 3) the effective parameters are combined for forward simulation and analysis, geophysical response characteristics of the shale reservoir are determined, and seismic sensitive attributes for solving the underground shale reservoir in a research area are determined; 4) post-stack seismic data are used for extracting the seismic sensitive attributes of the shale reservoir, and spatial distribution prediction is carried out; and 5) sweet point distribution in the shale reservoir is predicted comprehensively. The method starts from the characteristics of the shale oil and gas reservoir, various seismic prediction technical means are made full use of, target evaluation is carried out on sweet points, a forceful means is provided for shale reservoir description, the shale oil and gas reservoir exploration success rate can be improved basically, and the exploration risk and the development risk are reduced maximally.

Description

technical field [0001] The invention belongs to the field of geophysical exploration, and in particular relates to a seismic reservoir prediction method for shale oil and gas reservoirs. Background technique [0002] As a new oil and gas resource, shale oil and gas reservoirs are a brand-new field in China. Exploration and development started relatively late, with immature theories and inadequate technologies. In order to convert resources into production as soon as possible, effectively explore shale oil and gas, and relieve the pressure of conventional oil and gas exploration, it is urgent to carry out in-depth and detailed research and exploration, and realize large-scale and effective development of shale oil and gas as soon as possible. [0003] Shale oil and gas reservoirs are different from conventional oil and gas reservoirs. They have the characteristics of low porosity and low permeability, and the reservoirs have obvious anisotropy. Many factors make the predictio...

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Problems solved by technology

[0003] Shale oil and gas reservoirs are different from conventional oil and gas reservoirs. They have the characteristics of low porosity and low permeability, and the reservoirs have obvious anisotropy. Many factors make the prediction of shale oil and gas reservoirs very difficult.

Conventional reservoir prediction methods, such as attribute analysis, post-stack wave impedance inversion, etc., are mostly aimed at clastic rock reservoirs, and the effect of direct application to shale oil and gas exploration is not ideal

In the case of relatively few well data, only using attribute analysis or wave impedance inversion method, the result is often multi-solution, it is difficult to predict it accurately, and it is difficult to obtain satisfactory results

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