Simulation test method for seepage process of polymer solution at different positions of stratum

Abstract

The invention relates to a simulation test method for a seepage process of a polymer solution at different positions of a stratum. The method comprises the following steps of: preparing a sand filling tube model which accords with oil reservoir reality according to an oil reservoir mineral compositions, testing a porosity and a permeability parameter of a sand filling tube, and strictly simulating an oil reservoir corresponding parameter; selecting an injection flow value of a polymer system according to a researched stratum position; then performing a closed cyclic experimental test for simulating the original pressure and the temperature condition of the stratum, and simulating the seepage process of the polymer solution in the stratum; and closing, isolating oxygen, fetching a sample, testing the rheology of the sample, and comparing to calculate the change rule of the rheology. According to the simulation test method, the seepage process of the polymer system at different positions in the stratum can be reflected really; and a test and evaluation method is supplied to research on the rheology of the polymer solution during seepage at different positions and different seepage distances in the stratum.

Description

[0001] 1. Technical field: [0002] The invention relates to an indoor test and evaluation method of the rheological change rule of the polymer solution in the oil layer during the tertiary oil recovery process, in particular to a simulation test method of the seepage process of the polymer solution at different positions in the formation. 2. Background technology: [0003] Polymer solution flooding technology is a relatively mature method of enhancing oil recovery in domestic and foreign oilfields, but there is no effective method for the study of rheological changes of polymer solution seeping to different positions in the formation, which leads to the The credibility of drug development effect evaluation lacks a strong basis. The rheological properties of polymer solution in porous media is an important field in polymer rheology, which is related to the physical process of polymer solution flowing in porous media. Accurate and scientific analysis has urgent practical sig...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a simulation test method for the seepage process of polymer solution at different positions in the formation, which is used to solve the problem of lack of indoor testing and evaluation of the rheological change law of the polymer in the seepage process in the oil layer in the current oilfield development process

Images