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《Journal of Daqing Petroleum Institute》 2010-06
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Simulation of staged fracturing for horizontal wells based on PEBI grid refinements

WU Jun-lai1,2,LIU Yue-tian1,2(1.Key Lab of Petroleum Engineering,China University of Petroleum,Changping,Beijing 102249,China;2.College of Petroleum Engineering,China University of Petroleum,Changping,Beijing 102249,China)  
Many methods of fractured well representation in simulation model are known,some of them are too simple to be used in simulation model because they do not represent a fractured well behavior.By comparing three methods of hydraulic fracture representation,we put forward the establishment PEBI grid refinement technology to build vertical-horizontal fractured model.Combined with test interpretation theory,we arrived at the conclusion that horizontal wells with multi-fracture can result in bi-radial flow,and verified that the vertical well fracturing presents obvious linear flow and bilinear flow characteristics.The results show that when horizontal well fracturing produces single crack,the middle part pressure drops faster than the ends,and easily flooded;when horizontal well fracturing produces more cracks,with the number of fracture increase,the distance between fractures becomes smaller,the interaction between the cracks obvious,pressure drops quickly in the early,the time change early from radial flow to the bi-radial flow,so well testing curve moves down earlier.
【Fund】: 国家科技重大专项(2009ZX05009-004-03)
【CateGory Index】: TE357
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