for the purpose of lmprovrng water flooding development after a hlSh -water-cut period, a classification of reservoir pore structures is presented In this paper based on the practice of Xrnglongtar Oil field • Meanwhile , the relationshiP among depositional facies, diagenesis and pore structure is discussed • The pore structure is closely llnked.wlth depositional facies and petrophYsics~ showing the characteristics of getting worse in uniformitY of. pore thrqats along with improving rock properties as the effect of depositional cond~tions and ·draaenesls.Pore structure is critical to the vertical and horiZontal water washrng efficiency.
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