Comprehensive Evaluation Of Residual Oil And Digging Method Research In Qujiagou Area Of Zhongshanchuan Oilfield

Zhongshanchuan oil zone in the territory of the sub-long County, Shaanxi Province,located in the Ordos Basin, the secondary structure units-North Shaanxi Slope middle. Chang6layer is the area of the main reservoir, and also the delta front facies,it is the typical of lowporosity and low permeability reservoir, reservoir porosity and permeability is bad, due tothroat smaller role in the capillary force under the flow resistance is large, the internaldistribution of remaining oil reservoir highly fragmented, so causing further tap the potentialof this area is becoming increasingly difficult. Thus, in order to effectively tapping thepotential of this part of the remaining oil, we carried out a lot of basic research work, andInitially formed the basic method of residual oil analysis and evaluation in the later,provide thetechnical support for the late high water to find local residual oil-rich region.In this paper, regard4+5and Chang6layers in the Zhongshanchuan, qujiagou oil zone asresearch unit, hand the basis of detailed research work from the geological sedimentary,reservoir characteristics, reservoir properties, fluid properties and so on, further refineverification of reservoir characteristics, improved understanding of reservoir again,provide areliable basis for the use of sophisticated analysis of the status and distribution of oilremaining oil, distribution of the remaining oil with a flooded explained injection profileanalysis, coring wells washed situation analysis and numerical simulation methods,did adetailed analysis of remaining oil in the test block. And combined on the basis of differenttypes of residual oil were designed to optimize network and injection wells adjustmentprogram,put forward operable program to fine water and stabilizing oil controlling watergovernance, effectively improve development effectiveness, the use of residual oil, moisturereservoir to control rising, slowing decreasing reservoir to improve oil recovery purposes.By the above method, carried out extensive research and experiments for Chang4+5andChang6oil,the results of the study area has helped us having a more comprehensiveunderstandingstructure of geological characteristics of the study area structure and reservoirgeological features. and help us develop a preferred way to optimize injection parameters, to achieve efficient development, in order to extend the oil fields in the mountains area ofreservoir stimulation to provide protection. At the same time, and achieved good results fromthe pre-implementation, these methods have certain guiding significance for the distribution ofthe remaining oil fields and similar high water depth Potential. So, may be the basis of theresearch results in the area, in order to improve the effect of neighborhood development forreference, to lay the foundation for the rapid and efficient development of oil fields extended,it will have broad application prospect in northern Shaanxi low permeability oilfieldwaterflood development.