Simulating CO2 and Viscosity Dissolver Assisted Steam Flooding Technology in Extra-Heavy Oil Reservoir by Using 3-D Physical Modelling

Chunzhi WANG, Zhaomin LI, Songyan LI, Binfei LI, Wei LIU


The macroscopic fluid flow mechanism of enhanced oil recovery (EOR) by CO2 and viscosity dissolver assisted steam flooding technology for horizontal well (HDCS) is studied using “the 3-D physical modeling system of a complicated driving system under the realreservoir condition (high temperature and high pressure conditions) for EOR”. The production performance, pressure field and saturation field are measured with a differential pressure unit and saturation measuring probes. The resistance increased, the pressure increased and the flow direction changed under the physical and chemical actions of adsorption and the retention of the tannin extract. The tannin extract changed the flow direction from the main stream to the remaining oil regions on either side and displaced the remaining oil. The steam flooding not only displaced the residual oil in the main stream but also displaced the oil on either side by enlarging the swept volume from the main stream to the side. 


Horizontal wells; Steam flooding; Enhanced oil recovery (EOR); Pressure field; Saturation field; Fluid flow mechanism; 3-D physical mode; Tannin extract

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