The Study Of Fang507Block On Remaining Oil Distribution And Potential Exploitation Measures

Many oil fields in our country after years of water injection, has entered the stage of highwater cut, but because the geological conditions is complex and the heterogeneity is serious,there is still quite part of the remaining oil did not use or use bad in the underground, this partof the remaining oil is the main object to improve the recovery rate. We need do thefoundation work of water flooding development effect assessment before develop theremaining oi, then put forward the corresponding counter measures to tap the remaining oilaccording to the characteristics of remaining oil distribution.The sand body distribution of Fang507block is scattered,the strip sand or side sand bodycan’t be controlled in the300m well condition,control degree of water flooding si slow.Theplane,layer,interlayer contradictions is prominent.After years of development by waterinjection,the oilfield entered into high water-cut stage,the remaining oil distribution isscattered and enrichment area is diffcult to implement,which lead to the understanding andtapping of the remaining oil is difficulty.This article based on the SongFangTun oilfield Fang507block developmentcharacteristics,carried out the water flooding development effect assessment from water driveprocess, water flooding control degree, water cut rising rate,injection utilization, ect.This study build geological modeling and numerical value simulation of Fang507blockby the Petrel software and Eclipse software,combined with the influence to the distribution ofthe remaining oil such as sedimentary microfacies,structure,injection-production systemetc.The main genetic types of Fang507block of remaining oil is fault block type,not perfectinjection production type,well nets could not control type,level,between the layers ofinterference.According to the distribution of remaing oil,the corresponding conter measures oftapping the remaining oil is infilling and injection-production system adjustment, sidetrackhorizontal well, fill holes, the profile control of injection wells, fracturing, acidizing.