Application and Evaluation of Ternary System Deep Profile Control Technology

Abstract

The development process of ASP flooding is strong in stages, and the contradictions in each injection stage are prominent. In the profile adjustment stage, there are still some wells and layers with poor plugging control effect, and the injection system is inefficient and ineffective, which not only causes the waste of high-cost injection system, but also can not effectively displace the remaining oil, which affects the expansion of swept volume and enhanced oil recovery. Therefore, deep profile control technology should be adopted to further assist profile control adjustment, but conventional profile control agents are not applicable due to the existence of alkali in ternary injection system. In this paper, the type of profile control agent suitable for ternary injection system is optimized by laboratory test, and the principle of well and layer selection is optimized. The profile control opportunity is summarized by comparing the profile control effects of four ternary industrial blocks. Through deep profile control technology, the inter-layer and intra-layer contradictions in an industrial block of ASP flooding were alleviated, and the utilization ratio of ASP system in reservoir production degree was effectively improved, and the development effect was improved.