| After many years of water injection development, the satellite oilfield has been in high water production period. Many reservoirs are flooded and the pore structure changes after a long time water injection, which makes the heterogeneity more serious. Therefore, it is urgent to develop an effective and economic displacement system, especially for the high permeable section, and the large hole part. Therefore, we carried out the study on slug flooding systerm of the nonionic polyacrylamide crosslinking agent displacement system and the suspended particles, and the performance of the two systems is evaluated.Firstly, the optimum dosage of nonionic polyacrylamide and the crosslinking agent was selected by the time of gelation and the strength of the adhesive. The performance of the nonionic polyacrylamide crosslinking agent was evaluated by the experimental environment of different degrees of mineralizations and temperatures.Secondly, by measuring viscosity of different super displacement system with brookfield viscometer, we select the best super suspending agent and the optimum dosage of clay and super suspension agent. The performance of the control system was evaluated by the experimental environment of different agitation time, different degree of mineralization, and different temperatures..Thirdly, The compatibility of the polymer flooding system and the suspended particulate control system was studied by the time and the strength of the polyme.1%,2%,5 and 10% of flooding agent were added to the two systems respectively, and record time of gel and its viscosity, we determine the compatibility and the range of the compatibility of the two drive systems by comparing with single agent.Finally, study on the performance of the displacement system with core shear experiment, breakthrough pressure experiment, and plugging experiments in the temperature and pressure of satellite Oilfield. Through recovery and displacement effect, the optimal proportion of two flooding fluid is optimized. |
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