Method and device for evaluating fluid factors based on rock physical models

Abstract

The invention provides a method and device for evaluating fluid factors based on rock physical models. The evaluation method comprises the following steps: acquiring the physical property parameter information of rock in a researched work area; calculating the elastic parameters of a sandstone reservoir under the conditions different porosity and saturation of different fluids based on a White model by using input rock physical property parameters; selecting a plurality of conventional reservoir fluid factors in combination with the researched work area and carrying out analysis and evaluation; constructing porosity-fluid factor domain rock physical models corresponding to different fluid factors based on the calculated elastic parameters; and performing evaluation based on the rock physical models so as to obtain an optimal reservoir fluid factor. The optimal fluid factor selected by using the method of the invention can adapt to the fluid detection tasks of reservoirs of different pore development types; and the method overcomes the problems of limitation and multiple solutions of conventional fluid factor evaluation methods, and improves the accuracy of fluid detection and the precision of reservoir prediction.

Description

technical field [0001] The invention belongs to the field of petroleum geophysical exploration, and relates to a method and device for evaluating fluid factors based on rock physics models. Background technique [0002] With the continuous deepening of seismic exploration, the accuracy of reservoir prediction is getting higher and higher. How to extract reservoir physical properties and pore fluid information from seismic data volumes has become the focus of reservoir prediction research in recent years. For oil and gas exploration, reservoir porosity and water saturation determine the exploration and development potential of the reservoir, and are key parameters for evaluating reservoir traps. Conventional methods for predicting reservoir porosity and water saturation include: AVO analysis to identify specific types of hydrocarbon-bearing sandstone reservoirs, seismic inversion to predict reservoir pore development, attenuation attributes to predict energy anomalies in hydr...

AI Technical Summary

Problems solved by technology

At present, there are mainly two methods for fluid factor evaluation: one is the mathematical formula method, which is used to calculate the relative change of the fluid factor value when the rock is saturated with different fluids. The impact of fluid factors; the second is the intersection graph analysis method, which is used to analyze the distribution differences of reservoirs saturated with different fluids on the intersection graph. The influence of various geological factors cannot be analyzed separately, and the multi-solution is strong

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