Weak alkali ASP flooding in the second type reservoir in the A OilfieldProfile control technology and effect

Abstract

Profile control technology refers to the operation of plugging high permeability layers from injection wells, which can adjust the suction profile of injection layers and improve the ultimate recovery. In this paper, the heterogeneity of the weak alkali ternary compound block of the second kind of oil layer in the A area of the some Second Division is strong, the injection conditions between well groups are different, the injection pressure level of some wells is low, the suction conditions of each sedimentary unit are different, and the comprehensive water cut of the block is high. In order to alleviate the contradiction between in formation and in plane, improve the utilization rate of chemical agents, and improve the ultimate recovery rate of the block, the deep profile control is carried out according to the characteristics of the oil layer development of the well group. Ten profile control wells were selected to adopt the profile control system of one and two polymer gel, which is a water shutoff agent for oil production. The polymer solution was used to carry particles for deep profile control. In this paper, the characteristics of profile control technology and the method of well and layer selection are studied, and the change law of dynamic index after profile control is analyzed in detail.