Physical simulation experiment construction method for horizontal well model of bottom water sandstone oil reservoir

Abstract

The invention provides a physical simulation experiment construction method for a horizontal well model of a bottom water sandstone oil reservoir. The method comprises the following steps of obtainingbasic characteristics of the horizontal well model of the bottom water sandstone oil reservoir; establishing basic assumed conditions of a physical simulation experiment; selecting multiple equationsdescribing the horizontal well model of the bottom water sandstone oil reservoir, and combining the equations with a compressibility equation, a capillary force equation and initial and boundary conditions of an actual oil reservoir to obtain a mathematic model of the horizontal well model of the bottom water sandstone oil reservoir, wherein the equations include a continuity equation, a seepagemotion equation and a shaft internal pressure loss equation; according to the mathematic model, determining multiple basic quantities and parameters, and performing derivation to obtain multiple similarity parameters; analyzing the sensitivity of all the similarity parameters, and determining a fitting sequence of the similarity parameters in a physical simulation experiment construction process;according to the fitting sequence, fitting the similarity parameters, and determining parameters of a physical simulation experiment model needed to be built; and according to the parameters, buildingthe physical simulation experiment model for performing the physical simulation experiment.

Description

technical field [0001] The invention relates to the technical field of horizontal wells in sandstone reservoirs with bottom water, in particular to a method for constructing a physical simulation experiment of a horizontal well model in sandstone reservoirs with bottom water. Background technique [0002] In the development process of sandstone reservoirs with bottom water, the top priority is to control bottom water intrusion, so horizontal well technology is often used for development. In the process of studying the development of horizontal well models in sandstone reservoirs with bottom water, it is often necessary to construct physical simulation experiments to study the laws of bottom water intrusion and oil-water movement by means of experiments, so as to guide actual production. At present, most of the physical simulation experiments designed for sandstone reservoirs with bottom water are not designed according to the similarity criterion, and a few of the design phy...

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Problems solved by technology

At present, most of the physical simulation experiments designed for sandstone reservoirs with bottom water are not designed according to the similarity criterion, and a few of the design physical simulation experiments using the similarity criterion also fail to solve the pressure loss and water avoidance caused by the simulated wellbore friction. The influence of height on the shape of bottom water intrusion and other issues

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