Study On The Feasibility Of Deep Plugging Huff And Puff In High Temperature And High Salinity Reservoir

This paper is aiming at the condition of high temperature and high salinity reservoir,horizontal well water flooding problem in indoor physical simulation experimental method,through the distribution of non homogeneous model of horizontal well in bottom water drive oil,put forward to improve the main technical direction of recovery,in order to carry out the horizontal well point,local water.The oil stabilization and water control method research.The use of high temperature resistance and salt heterogeneous physical model of horizontal well reservoir design,carried out experiments of conventional plugging and deep water plugging effect,the results show that in the condition of high temperature and high salinity reservoir?under 115?,the mineralization degree of 27×10⁴mg/L?,deep water shutoff and improve the recovery rate of amplitude ratio the conventional water shutoff 7.66%,heterogeneity and the model is stronger,sealing distance is more deep,the better;the optimization of ultra low interfacial tension surfactant deep stimulation and conventional stimulation experiments,the experimental results show that the deep stimulation effect of oil is better than that of the conventional stimulation;through horizontal wells deep plug-throughput simulation experiment and prove the deep-blocking composite technology and improve the recovery rate of throughput is better than single deep stimulation and deep water shutoff,and verify the feasibility of the level of throughput of composite technology in high temperature and high salinity wells plugging and deep horizontal well;CO₂ and screening of strong emulsifying surfactant as the combination of handling agent,to carry out horizontal well simulation experiment of deep plug-throughput efficiency,the experimental results show that the level of efficiency of deep well plugging-stimulation effect is very obvious;according to the results,the recommended level wells reservoir with high temperature,high salt water control and oil increase with deep plugging-throughput composite technology.