Method for quantifying classification reservoir space distribution characteristics

Abstract

The invention relates to a method for quantifying classification reservoir space distribution characteristics. The method comprises the following steps: 1) determining parameter items for classification reservoir division in a target area and establishing a parameter standard; 2) evaluating a well-drilled single-well small-layer classification reservoir according to the parameter standard to obtain evaluation result data; 3) loading the result data into a three-dimensional structure model of the target area, and discretizing the result data; 4) performing correlation analysis on the discretized data in the three-dimensional construction model, and determining quantitative simulation parameters of each type of reservoir of each small layer; and 5) according to the quantitative simulation parameters, respectively simulating the distribution characteristics of different reservoir types of each small layer in a three-dimensional space by using a geostatistical simulation algorithm. According to the method, the change rules of the classification reservoir in the transverse direction and the longitudinal direction between wells can be well revealed, the distribution characteristics of the classification reservoir in the three-dimensional space are visually displayed, formulation of a development scheme and adjustment and deployment of an injection-production well pattern are facilitated, and the development effect of an oil reservoir is improved.

Description

technical field [0001] The invention relates to a method for quantifying and classifying spatial distribution characteristics of reservoirs, which belongs to the field of petroleum and natural gas exploration and development. Background technique [0002] Affected by reservoir heterogeneity, oilfields at home and abroad show certain interlayer and plane contradictions in the development process. When the distribution characteristics of classified reservoirs are not clear, with water injection development, reservoirs with good physical properties The breakthrough of layer water injection is becoming more and more obvious, the difficulty of water injection in reservoirs with poor physical properties is becoming more and more serious, and the contradictions between layers and planes are becoming more and more prominent. Reservoir classification research based on the spatial distribution characteristics of quantitatively classified reservoirs plays a greater role in oilfield deve...

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Problems solved by technology

[0007] The purpose of the present invention is to provide a method for quantifying the spatial distribution characteristics of classified reservoirs, so as to solve the problem that the existing technology only qualitatively describes the distribution characteristics of the classified reservoir interpretation model and reservoir parameters in three-dimensional space, but cannot quantitatively represent Problems of Reservoir Distribution Characteristics in Interwell Classification

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