Oil-Water Layer Identification And Potential Evaluation Of Ultralow Permeability Reservoir In Beizhong Oilfield, Haita Basin

Beizhong Oilfieldis is in the south of Beizhong Depression, Hailar Basin, and the majorexploited formations is Nantun Formation. There are many problems in developingcurrently,first is the difficult in oil-water layer identification, oil wells exhibit high water cutafter commissioning. Second is large proportion of stripper wells, and regional distribution.The third is the poor effect of water uptake in water wells.Based on the research of Ultralow Permeability Reservoir in Beizhong Oilfieldis, thispaper will re-recognize it in geological angle, search for the cause of the problem, explorationof a new channel to identificate oil-water layer, lay the foundation to understanding andmanagement stripper well in this area. Mainly discussed the morphology,scale andsuperimposed model of sandbody and its influence to reservoirs, the effects of pool-formingpattern to hydrocarbon enrichment, reservoir physical properties and the influence mode oftuffaceous, reservoirs sensitive analysis. And on this basis, put forward a set of methods ofoil-water layer identification and potential evaluation, from logging to conclusion,adapt tothis area.