Characterization of pore volume of cumulative water injection distribution

Abstract

Pore volume of Cumulative water injection is one of the factors for evaluating water flood effect in a water flood oil field. In previous study, there were limited lab studies for evaluating oil displacement efficiency. A method to characterize the distribution of pore volume of cumulative water injection is proposed in this paper, and it is verified by a five-spot water flooding streamline simulation model. The logarithmic relation between pore volume of cumulative water injection and water saturation is established by regression. An inflection point and limit point of cumulative water injection pore volume are identified. Current simulation model indicates inflection point appears after 2-5 pore volume (PV) injection, and limit point appears after 15-25 PV injection. Both inflection and limit point vary in different regions of reservoir.

Keywords

Water drive reservoir / Cumulative water injection pore volume / Numerical flow simulation / Inflection point / Limit point / Recovery factor

Acknowledgments

This work was financially Supported by the National Basic Research Program of China (973) Program, ‘study on water injection in fracture-cave carbonate reservoir’ (2011CB201000).

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