Experimental Research On Methods Of Improving Chemical Flooding Oil Recovery Of Jin Block 16

Under the condition of bulk properties of oil displacement unchanged, this paper tested the rheological property, stability, interfacial tension force and absorption losses of SAA., researched the impact of injection time, chemical concentration, sacrifice agent, slug combination and injection methods on the displacement characteristics, and compared the displacement characteristics of different schemes, buy carried interior physical simulation test. The results showed that: the time of water drive convert into polymer flooding sooner, the higher degree of reserve recovery of all the displacement test schemes; for the core of which inject polymer solution with high molecular weight from Conventional polymer flooding, the converting time sooner, the better the effect of flooding; for the ternary system, when concentration of base and active agent unchanged, but which of polymer solution changed, the degree of chemical flooding recovery is increasing with the increasing of polymer concentration. Both the binary composite system and the ternary composite system, the degree of chemical flooding recovery decreased along with the decrease of surfactant concentration, and by joining sacrifice agent, it could reduce the amount of surfactant to reduce the cost of chemical inputs. In the selections of the six displacement systems, displacement characteristics of the binary system is better than the ternary system; displacement characteristic of weak base ternary system is better than alkali ternary system; displacement characteristic of oil displacement which add the sacrifice agent is considerable which not add sacrifice agent, but it could reduce the amount of active agent.