Experimental Study of Chemical Flooding of Suizhong 36-1 Oilfield

Abstract

Aim at the reservoir characteristics of Suizhong 36-1 Oil Field, this paper has developed typical twodimensional physical model in parallel between the layers and studied the macroscopic displacement effect of polymer flooding and binary compound flooding, and studied the interlayer spread law and oil displacement efficiency of polymer flooding and binary combination flooding by using saturation monitoring system deeply. The results show that: when the multiples of pore volume injected for polymer was 0.3 after water flooding, the recovery efficiency increased by 10.3%, and when the multiples of pore volume injected for binary combination flooding was 0.3 after polymer flooding and the recovery efficiency could also increase by 19.3%, and the effect of enhanced oil recovery was obvious during the binary combination flooding and polymer flooding; Saturation monitoring data showed that there formed oil wall and increased the flow resistance and expanded the swept volume during the stage of polymer flooding and binary combination flooding, effective use of low-permeability layer was the key to improve oil recovery.

Laboratory Study on EOR in Offshore Oilfields by Variable Concentrations Polymer Flooding

“…The implementation of polymer flooding was initiated in 2003 in Bohai oilfields, and the obvious effects on water cut reduction and oil production improvement were seen [1]. However, compared with onshore oilfields, the reservoir in offshore oilfields has characteristics of serious reservoir heterogeneity, high crude oil viscosity and high brine salinity, etc [2]. To exploit more crude oil in the limited life of the platform, there is a need for the rapid development of offshore oilfields [3 -5].…”