Method for establishing waterflooding extraction predictable physical model of sandstone oil deposit

Abstract

The invention discloses a method for establishing a waterflooding extraction predictable physical model of a sandstone oil deposit, which comprises the steps of: according to the characteristics of oil and water two-phase interstitial flow of the three-dimensional oil deposit, establishing similarity criterions of water-driven development simulation of the oil deposit, wherein the similarity criterions comprise shape and space similarity, shaft geometric similarity, rock physical property similarity, oil and water viscosity similarity, dynamical similarity, time similarity, saturation degree distribution similarity and potential distribution similarity; providing a realizing path of the similarity criterions, and designing a physical model according to the similarity criterions; and making the physical model. The invention provides a set of novel perfect technical method for simulating and predicting the oil and water interstitial flow and water injection development process of the sandstone oil deposit by using a physical simulating means.

Description

technical field [0001] The present invention relates to a new physical experiment method for reservoir seepage and development process research in the field of oil and gas field development, in particular to a method for establishing a predictable physical model for sandstone reservoir water injection development, which is also applicable to other seepage phenomena related to porous media research field. Background technique [0002] In the field of oil and gas field development, people have been trying to use physical experiment methods to simulate and predict reservoir seepage and development processes, that is, through short-term small model tests, the physical processes that occur in actual reservoirs can be simulated and predicted according to a certain similar relationship. Reappear in the model, so as to quickly and intuitively observe the seepage and development process of the reservoir, measure the required data, study and predict the implementation effect of the de...

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Problems solved by technology

However, because 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 fluid flow in the reservoir in a certain aspect and to a certain extent. It is impossible to fully simulate the seepage characteristics and development process of the actual reservoir, and it is impossible to predict the actual reservoir development effect

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