Study on Air Foam Flooding Technology to Enhance Oil Recovery of Mid Deep Complex Fault Block Reservoir by Water Injection

Abstract

AbstractIn order to solve the problem of rapid increase in water content and decrease in production after water flooding in fault block reservoirs, the air foam flooding experiments of static low temperature oxidation, single and double sand filled tube were carried out. In view of the complex fault block reservoir the Arrhenius correction model and the index which was reflected the continuous ability of crude oil participating in low temperature oxidation reaction were established. The results showed that there was no absolute relationship between oxygen consumption and viscosity of crude oil, and there was a turning point of water saturation. The reaction rate is greatly affected by the reaction temperature. The displacement efficiency of single pipe is increased about 15%. The injection of air foam can effectively block the high permeable strip, and the middle low permeability layer is effectively utilized, and the recovery ratio is increased by about 10.9%.KeywordsComplex fault block reservoirAir foamLow temperature oxidation