Research On The Enriched Regularity Of Remaining Oil For Nuraly Oil Fieled

With the growth of oil extraction, oil field generally will enter high water cut，high-recovery stage, but the ground still contains a lot of residual oil, accurately describe theenriched regularity of remaining oil is the basis of efficient development of remaining oil andincrease oil recovery.This paper takes the Nuraly oil field as the object of study, according to combination ofthe well logging, observation of the rock core, production performance and many otherdynamic and static information, guided by the theories of petroleum geology, reservoirengineering, sedimentology, reservoir simulation and other academic method, layers have beenclassified and then it has been studying on reservoir structure, microfacies and reservoirquality. On the basis of the fine reservoir description, technique of random model and faciescontrolled model has been used in3D quantitative description of reservoir, then, reservoirsimulation has been used for production history simulation. On the basis of reserves andpressure fitting well,58production wells has been made to simulate production history, fittingrate is86.21%.Then the distribution of the remaining oil and the enriched regularity ofremaining oil in-depth analyzed, summarized the enrichment rules of the remaining oil, knowethat affecting factors of enrichment renmaining oil in Nuraly oil field are stuctural, microfacies,reservoir properties, injection patterns, opening shot degree and injection parameters. Finallyproposed reasonable ideas to develop residual oil, basing on these works, a solid foundationfor increase oil recovery and improvement of the block development effectiveness.