Ping North Oil Field Profile Control Technology

According to the geological property of Pingbei Oilfield and the?principle of water plugging and profile modification, the particle compounding gel waterplugging-profilecontrol agent and process technique are developed. The agent has the properties of high intensity, bearing scour, bearing high temperature, resisting shearing and bearing salt, what's more, its price is low and the material wide. The test of water plugging and profile modification has been done in some wells of the Pingbei Oilfield. It shows that the agent can effectively seal water overflow of the big channel or crack. It can change the flowing direction of injecting water, upgrade the level of injection water, control the increase of water in the well, avoid explosive flooding of oil-well, improve the condition of disequilibrium of vertical absorbing water on the oil layer, increase the sweep efficiency of injecting water and the displacement efficiency. The goal of upgrading recovery efficiency and decreasing volume of the water can be realized with this technique. The technique has also the specificity of" seal but keep certain permeability". It can be used to plug water and modify profile in Pingbei or comparative oilfield.