基于优序图法的CO2驱防窜剂性能评价方法及其应用OA

In order to optimize anti-channeling performance of anti-channeling agent and prolong the plugging time,influence of the main controlling factors affecting the performance of CO2 flooding anti-channeling agent is studied.Firstly,based on precedence diagram method,a three-level index system for evaluating anti-channeling agent per-formance and weights of various indexes are screened and determined,thereby clarifying influence degree of vari-ous factors on anti-channeling effect.Then,the research is verified by performance evaluation experiment of CO2 flooding anti-channeling agent.Finally,the visualized plate-model simulation experiment is carried out to visualize the influence of injection PV on anti-channeling effect,further exploring the influence of injection PV on anti-chan-neling effect.The results show that anti-channeling agent injection PV has the greatest influence on anti-channeling effect,while injection rate has the least influence.Mass fraction and fracture width of anti-channeling agent have certain influence on anti-channeling effect,and the influence degree is between that of injection PV and injection rate.The visualized plate-model simulation experiment further verifies influence degree of injection PV on anti-channeling effect,which has good consistency with the theoretical research and improves the credibility of the theo-retical research.The research can be used to improve the plugging effect of CO2 flooding anti-channeling agent,bet-ter prevent gas channeling and enhance oil recovery of CO2 flooding.