Research on Influence Factors and Theoretical Value on Recovery Rate

doi:10.3863/j.issn.1674–5086.2013.06.014

Abstract

Abstract:

Recovery rate is one of the key development index which can affect the ultimate development effect of oilfields
whether it remains high or low，therefore，the researches of reasonable recovery rate and influence factors play an important
role in production decision of oilfields. Previous authors researched the recovery rate mainly based on reservoir numerical
simulation and mathematical statistics，however，the certain limitation is both theoretic and applied aspects. Based on the flow
fraction equation，we create the relation expression among recovery rate and reservoir properties，water cut and annual ascending
velocity of water cut，and analyze the influence of individual factor on recovery rate. The theoretical analysis result shows that
coefficient b by regression between ratio of oil to water relative permeability and water saturation is negative correlation to
recovery rate. Water cut is negatively correlated to recovery rate when fw<50%，and positively correlated when fw>50%. At
different stages of water cut，the faster the velocity of water cut ascends，the higher recovery rate could be. The method discussed
in this paper could be applied to the evaluation of theoretical recovery rate of certain reservoir at different development stages

Key words: recovery rate, water cut, ascending velocity of water cut, influence factor, evaluation

Jiang Fengguang1，2, Wang Xiaolin1. Research on Influence Factors and Theoretical Value on Recovery Rate[J]. 西南石油大学学报(自然科学版), DOI: 10.3863/j.issn.1674–5086.2013.06.014.

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