The Research of Capillary Pressure in the Process of CO Displacement in Low-Permeability Reservoir

ABSTRACT

The function of capillary pressure in the process of CO₂ displacement in low-permeability reservoir is researched through combination of indoor experiments and numerical simulation. On the basis of different displacement experiments in long core chamber, one-dimensional numerical simulation component model is built to research the function of capillary pressure under the different CO₂ displacement ways. The results show that the capillary pressure under the different CO₂ displacement ways is not consistent. Capillary pressure is the driving force in the process of CO₂ displacement while resistance force in the process of CO₂ pressure buildup and displacement. In order to promote reasonable and efficient development of low-permeability reservoirs, it is suggested that further study about microscopic effects and laws of the capillary pressure in the reservoir should be done through experiment.

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