Method for modeling predictable physical model for fractured anisotropic oil reservoir water flooding development

Abstract

The invention discloses a method for modeling a predictable physical model for fractured anisotropic oil reservoir water flooding development, and the method comprises the following steps: (a) establishing similarity criteria for simulating the fractured oil reservoir development according to characteristics of the process of fractured oil reservoir water flooding oil development and by utilizing theories of seepage mechanics and similarity analysis, wherein the similarity criteria comprise similarities in shape and space, shaft geometry, physical properties of rock, oil-water viscosity, gravity-pressure, matrix and fracture movable oil amount ratio, oil content distribution in matrix, matrix imbibition and fracture displacement characteristic time, imbibition intensity distribution and time process; (b) realizing the similarity criteria and a design method of model parameters; and (c) modeling an oil reservoir macroscopic physical model which meets the multiple similarities so as to comprehensively simulate and predict seepage characteristics and the development process of real fractured oil reservoir. A predictable physical simulation similarity criterion system for the fractured anisotropic oil reservoir is established, has comprehensive functions and is easy to realize.

Description

technical field [0001] The invention relates to a method for establishing a predictable physical model for fracture anisotropic oil reservoir water flooding development, which is a new physical experimental method for the study of oil reservoir seepage and development process in the field of oil and gas field development, and is also applicable to other fracture seepage phenomena related. field of study. Background technique [0002] Fractured medium oil and gas reservoirs are ubiquitous in all parts of the world, accounting for more than half of the proven unexploited reserves. Due to the dual medium characteristics, the seepage characteristics and seepage process of oil, gas, water and other fluids in such oil and gas reservoirs are more complex and more difficult to develop than ordinary oil and gas reservoirs. For this reason, people have been trying to use physical experimental methods to simulate and predict the seepage and development process of fractured oil reservo...

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Problems solved by technology

However, no successful reservoir predictive physical simulation research reports have been found before.

[0003] The main reason why predictable physical simulation of fractured reservoirs is difficult to achieve is that the built physical model cannot fully meet the similarity requirements, so it is impossible to establish a direct correspondence between the physical model and the actual reservoir

[0004] Since it is very difficult to strictly satisfy multiple similarity conditions in the laboratory, most of the previous simulation studies only established models for a small number of similarity criteria, so they can only reflect the behavior of fluids in the reservoir in certain aspects and to a certain extent. Therefore, it is impossible to fully simulate the seepage characteristics and development process of the actual reservoir, and it is also impossible to predict the actual reservoir development effect

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