低渗透砂岩油藏油水相对渗透率曲线特征  

Features of oil water relative permeability curves for low permeability sandstone reservoir.

作　　者：张学文[1] 尹家宏[2] 

机构地区：[1]中国石油天然气集团公司国际合作部 [2]辽河石油勘探局锦州采油厂

出　　处：《特种油气藏》1999年第2期27-31,共5页Special Oil & Gas Reservoirs

摘　　要：摘要方法综合分析我国十余个低渗透油藏的毛管压力曲线和相对渗透率曲线，Ｊ（Ｓｗ）函数及Ｗｙｌｉｅ和Ｇａｒｄｎｅｒ公式，求出不同渗透率油藏的理论相对渗透率曲线。目的总结低渗透砂岩油藏油水相对渗透率曲线特征，为其开发提供理论依据。结果低渗透油藏中孔隙度、束缚水饱和度、残余油饱和度及共渗点与储层渗透率有一定的关系，即随着渗透率的增大，孔隙度、束缚水饱和度增大，残余油饱和度减小，油水两相共渗区的范围变窄。结论低渗透砂岩油藏的油水相对渗透率曲线具有一定的特征，即随着含水饱和度的增加，油相相对渗透率急剧下降，水相相对渗透率变化不大。Method\ Capillary pressure curves and relative permeability curves from tens of reservoirs are comprehensively analyzed, and theoretical curves for reservoir with different permeability are derived according to J(Sw) function, Wyllie and Gardner equations. Purpose\ To summarize characteristics of oil/water relative permeability curves in low permeable sandstone reservoir and provide theoretical accordance for development. Result\ Porosity, irreducible water saturation, residual oil saturation and common percolation points of low permeability reservoir is connected with formation permeability to some extend, that is porosity and bounded water saturation shows exponential relation with the increase of permeability while residual oil saturation decreases and common percolation area of two phases turns narrow. Conclusion\ Oil water relative permeability curves of low permeability sandstone reservoirs features as follows: relative permeability of oil phase drastically decrease as water saturation increases, but that of water phase shows slight change. Method illustrated here can provide input for analog computation (dynamic forecast and reserve calculation) with theoretical model.\;

关 键 词：低渗透油藏 相对渗透率 孔隙度 油水相 

分 类 号：TE312[石油与天然气工程—油气田开发工程] TE348