Laboratory Experimental Study In-house Of Multicycle Profile Control And Water Shutoff Of Haiwaihe Oilfield

The most part of domestic oil fields are continental deposit multiple zone reservoirs, the permeability alternation of interlayer and inner layer and plane is quite large, so when we operate the water flooding development, the flooding water carries forward along the high permeability area more easily, making the vertical and the planned flooding water to carry forward unevenly, and the flooding water advances suddenly to the oil well prematurely, causing the oil field water flooding prematurely. The multicycle profile control is a multicycle downflow well profile for different purposes for the nonhomogeous reservoir. It can reach the purpose of adjusting the water layer between the situation , controlling of water channeling and improving sweep efficiency of water flooding by adjusting the differences of permeability.In this paper, wo evaluate the performances of 8 kinds Of profile control agents. By changing the temperatures, pHs and salinities of the profile control agents of different formulas and so on, select the profile control agents for the scene production needs; and in Haiwaihe Oilfiel through the core flow experiment we reasearch the water shutoff situations of different permeability cores, we evaluate temperature and stability comprehensively etc, and verify the descending mechanism of profile control with experiments and optimizi the rounds of the profile control and optimize medicine and give the opportunity of profile contrel. The research shows that, if we operate the multi-round profile control water shutoff measures and succeed the rounds of the profile control water shutoff measures timely, we can achieve the desired effect of controllong the water and stabling the oil, displaying the production potential of high moisture content reservoir.