Inteference Testing Analysis Methods And Software Development For Polymer Flooding

The polymer is a typical non Newtonian fluid,s seepage characteristic is very complex,the existing interference test technology in polymer testing is not mature,there is an urgent need for the interference test method of polymer flooding.This paper established a non Newtonian fluid model with interference test wells,the pressure and the concentration of polymer were solved by the numerical method,respectively study on Polymer flooding interference test curves,the characteristics of well test curves of polymer injection wells and production wells under interference of adjacent wells are studied.The characteristic of the well test curve of polymer flooding is that the curve is upward in the later stage,The magnitude of the change depends on the concentration of the polymer;Neighboring well interference polymer injection well test curves can be divided into five stages,The wellbore reservoir section,over section,radial flow section are similar to the common polymer injection well test curve,the pressure derivative is upward trend in the radial flow,and the characteristics of the latter two sections of the interference well are that the derivative curve decreases first and then tends to be gentle;Well test curve under interference of polymer injection well can be divided into four stages,The first three stages are similar to the general test curve,in the last section,the derivative curve is affected by interference well,and the downward trend tends to steep.Based on the research results of polymer interference well test,the well test analysis software for polymer interference well testing model was developed by using QT,so as to fill the blank in the field of polymer interference test.The software includes well test design,well test interpretation and parameter sensitivity analysis.