The Study On Flow Unit In Yan10 Formation BS Area Of MaLing Oilfield

BS area is located northwest of Maling Oilfield,whitch is a small oil blocks in Maling Oilfield.Reservoir type is structural-lithologic composite reservoir,the main oil layers are Jurassic Yan'an yan 9 and yan 10.In 1998,the district began testing,devoted 99 years of rolling development,with the development of the oilfield,exposes a series of contradictions in the development,main performance is not up to the part of water injection,water flooding efficiency is low,block measures not effective.As of August 2006,the extent of 18.5%recovery block,the remaining oil dispersed local enrichment appeared overall situation.Therefore,through the BS areas detailed reservoir description,based on the study of the distribution of the remaining oil to develop a more detailed and feasible ideas to develop techniques to form a complete set of oilfields technology to ensure efficient and stable and sustainable BS Area development has important significance.In this paper,according to the characteristics of low permeability lithologic composite reservoir,in sedimentology,logging geology,development geology,organic geochemistry,geology logging,computer technology and other disciplines combine theory as a guide,as a means of human-machine joint,integrated use of core,log,following work is done:1)Test data and develop dynamic reservoir of contrast is analyzed.2)Features a small layer structure is analyzed.3)Reservoir characteristicsis studied.4)Starting from four characteristcs relations,reservoir parameters interpretation models is established and the wells is evaluated.5)Skeleton sandstone reservoir sedimentary micro facies is further clarified.According to BS District Yan'an reservoir geological characteristics,this paper focuses on the base layer division and contrast on the application of coring,logging and development of dynamic information such as the establishment of the sandwich segment BS recognition mode;coring wells to flow cell division is based on the region's 81 wells flow unit division.Based on the above work,on the distribution of all types of mobile units remaining oil were studied.