A modeling method for reservoir architecture of sand-mudstone interbedded sedimentary body

Abstract

The invention discloses a modeling method for a sand shale interbed type sedimentary body reservoir architecture. The method comprises three aspects of hard data control, layered modeling, and reservoir and interlayer nesting, wherein the layered modeling mainly comprises reservoir modeling, spacing layer modeling, and interlayer modeling. According to the modeling method, thin layer division is performed by adopting a half amplitude point based thin layer division principle, so that the defect that true thicknesses and depths of a reservoir and a spacing layer cannot be obtained in a conventional method for determining a boundary line of a thin layer based on relative maximum of natural gamma and / or positive anomaly of natural potential is overcome; and the hard data control is adopted for architecture modeling, so that a demarcation point of sand shale is accurately positioned, three-dimensional spatial distribution of single sand bodies and sub sand bodies is accurately depicted, the architecture effect is good, the precision is high, the difficulty in development is lowered, and the development benefits are increased.

Description

technical field [0001] The invention belongs to the technical field of reservoir configuration modeling, in particular to a modeling method for the reservoir configuration of a sand-shale interbedded sedimentary body. Background technique [0002] With the continuous deepening of oilfield exploration and development, reservoir description has become one of the routine research contents, and 3D geological modeling is a visual representation of reservoir description results, which has become the focus of reservoir geological research. In recent years, many scholars have conducted a lot of exploratory research on the methods and techniques of delta modeling, and achieved a series of results, which are mainly based on the principle of small-layer comparison of the relative maximum value of natural gamma or the positive anomaly of spontaneous potential Reservoir geological model (this is essentially different from configuration modeling), the middle part of the sublayers drawn by...

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Problems solved by technology

[0005] The purpose of the embodiments of the present invention is to provide a modeling method for sand-mudstone interbedded sedimentary body reservoir architecture, aiming to solve the problem that the traditional reservoir architecture modeling method cannot accurately locate the boundary point of sand-mudstone, and the precision is low , the effect is poor, multi-provenance leads to complex characteristics of oilfield reservoirs, and the distribution of single sand bodies is unclear, which makes development difficult

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