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Main Controlling Factors of Lithologic Reservoirs in Hongliuquan Area,Qaidam Basin

SUN Xiu-jian,LIU Ying-ru,LE Xin-fu,NI Xiang-long,LI Yan-li(Northwest Branch,Research Institute of Petroleum Exploration and Development,PetroChina,Lanzhou 730020,China)  
Hongliuquan area,adjacent to Hongshi depression(a hydrocarbon-generated sag),is one of the most developed areas for lithologic reservoirs in Qaidam basin.Through finely compartmentalizing sedimentary micro-facies in E13 layer,we pointed out that the favorable sedimentary micro-facies developed under the control of depositional slope-break belt should be the main controlling factors of lithologic reservoirs in this area,and the sand bodies in subwater diffluence rivers and mouth bars be the main reservoir bodies for lithologic reservoirs.According to this suggestion,the certain scale lithologic reservoirs have been found in the Hongliuquan area.
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