DOI: 10.3724/SP.J.1249.2018.02179

Journal of Shenzhen University Science and Engineering (深圳大学学报理工版) 2018/35:2 PP.179-186

Physical simulation on system of deep profile control and flooding on high water cut reservoir

Gudao Oilfield Zhongyiqu Ng3 block is selected as target reservoir for studying the ability of increasing oil recovery by divinylbenzene-co-acrylamide (DCA) microspheres and enhanced emulsification system after polymer flooding. According to the characteristics of the target reservoir, a heterogeneous core physical simulation experiment is designed for optimizing injection parameters and particles sizes. Three dimensional heterogeneous model is devised in the principal of the similarity criterion. Through measuring electrical resistivity, the residual oil distributions are characterized at different flooding stage. Two design schemes are introduced,one is the polymer flooding-well pattern adjustment-deep profile mobility control and the other is well pattern adjustment-polymer flooding-deep profile mobility control. The results show that the recovery efficiency is improved 8.3% by DCA and enhanced emulsification system after polymer flooding. DCA and enhanced emulsification system could plug complex fluid-fingering channels. Attributed to these excellent properties, DCA and enhanced emulsification system is confirmed as a reasonable enhanced oil recovery method for reservoirs with highly dispersed residual oil.

Key words:oilfield development,well pattern adjustment,polymer microspheres,physical simulation,distribution of remaining oil,enhanced recovery

ReleaseDate:2018-03-20 15:26:57

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