Reservoir prediction method guided by facies-controlled rock physics model

Abstract

The invention provides a reservoir prediction method under guidance of a phase control rock physical model. The reservoir prediction method under guidance of a phase control rock physical model includes the steps: dividing sedimentary facies; obtaining difference of the main mineral components of the reservoir in each sedimentary facies; preliminarily determining the rock physical modeling parameter in each sedimentary facies; establishing a preliminary rock physical model for the reservoir in each sedimentary facies; obtaining difference between the analog data and the measured data, and if the difference is greater than the preset error allowable value, adjusting the modeling parameter and reestablishing the final rock physical model until obtaining the rock physical model in each sedimentary facies; determining two elastic parameters which are most sensitive to changes of characteristic minerals; obtaining the relation curve of the two elastic parameters through calculation; obtaining distribution of the two elastic parameters of the whole three-dimensional earthquake region; and dividing distribution of the two elastic parameters of the whole three-dimensional earthquake region into a reservoir and a non-reservoir, and obtaining reservoir distribution of the whole three-dimensional earthquake region. The reservoir prediction method under guidance of a phase control rock physical model can improve the accuracy of reservoir prediction under complicated geological conditions.

Description

technical field [0001] The invention relates to the technical field of petroleum exploration, in particular to a reservoir prediction method under the guidance of a phase-controlled rock physics model. Background technique [0002] With the increasing demand for oil and gas resources in modern society, the degree of oil and gas exploration and development continues to deepen. complex, gradually turning to lithologic traps, composite traps, and non-"bright spot" oil and gas reservoirs, etc., which makes it difficult for conventional exploration techniques to identify oil and gas distribution, such as conventional wave impedance inversion and pre-stack inversion. In complex structures and sedimentary conditions, reservoirs are often not identified or have multiple solutions. Therefore, certain methods are needed to improve the accuracy of reservoir prediction technology, which plays an important role in reducing exploration risks and improving the success rate of exploration. ...

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Problems solved by technology

[0004] However, the geological conditions are usually complex and changeable. In a research block, the reservoir may be divided into many types vertically and horizontally, and the lithology or mineral composition of the reservoir are different. In this case, the same Petrophysical models cannot accurately predict the distribution of reservoirs across the region

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