Application of"gel+particle"compound enhanced profile control system in Penglai oilfield horizontal wells
Penglai oilfield is a lithological oil reservoir with multiple oil-water systems,mainly characterized by medium to high porosity and permeability,with a rapid increase in water content.The thickness of the hori-zontal well group in this block is large,and the injection production advantage channel is obvious.However,the pressure limit of this block is low,and the compatibility between injected water and conventional plugging systems is poor,which puts higher requirements on the injection and plugging performance of the plugging sys-tem.In this paper,to optimize the"gel+particle"composite enhanced profile control system with good injectiv-ity and strong plugging ability,the dispersed micro-gel with controllable particle size and good self aggregation performance was selected,combined with the optimized low resistance and high strength lotion polymer gel system.The application effect in Well Cluster J of Penglai oilfield is good,and the cumulative oil increase ex-ceeds reached 7 806 m3.
controlled floodingdispersed micro-gellotion polymergel systemwater controlling and oil increasing
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