变m值法计算火山岩含油饱和度  

Calculating Volcanic Oil Saturation by Using the Method of Variable m Value

作　　者：刘之的[1] 

机构地区：[1]西安科技大学地质与环境学院,陕西西安710054

出　　处：《长江大学学报（自科版）（上旬）》2010年第3期62-65,共4页JOURNAL OF YANGTZE UNIVERSITY (NATURAL SCIENCE EDITION) SCI ＆ ENG

基　　金：新疆油田博士后课题(XJBSH0601);西安科技大学博士后科研启动基金项目(A5030720)

摘　　要：火山岩油气藏研究中,含油饱和度计算的准确与否直接关系到油藏的勘探开发。在实际测井解释工作中发现,裂缝发育井段,用基于岩电参数的阿尔奇方程计算的火山岩含油饱和度比实际饱和度偏低;高阻、低孔储层井段,用基于岩电实验参数的阿尔奇公式计算的含油饱和度比实际饱和度偏高。为此,基于裂缝性地层的导电通路是裂缝流体与岩块孔隙流体纯岩石组成的假设,推导出了逐点计算m值的方法,并结合火山岩岩电参数实验结果,给出了火山岩含油饱和度测井计算变m值模型。将变m值含油饱和度计算模型应用于准噶尔盆地六九区火山岩储层,计算的含油饱和度在裂缝发育段比传统阿尔奇方程计算的高2%～5%,在低孔、高阻储层段,该法计算的含油饱和度比传统阿尔奇方程计算的饱和度低3%～6%,通过试油验证,该法计算的含油饱和度精度明显得到了提高,从而为火山岩储层评价、储量计算与地质建模提供了较为准确的饱和度参数。It is directly related to the reservoir exploration and development for accurately calculating oil saturation in studying volcanic reservoirs.In log interpretation,the oil saturation based on rock electrical parameters of the Archie equation is lower than the actual degree of saturation in fracture hole,and the oil saturation based on rock electrical parameters of the Archie equation is higher than the actual degree of saturation in high resistance and low porosity reservoir hole.In this paper,based on the assumptions that the formation of the conductive channel is a fracture fluid and the rock pore fluid composition of pure rock,the method of point by point calculating the value of m is deduced,in combination with results of the volcanic rock electrical parameters.The volcanic rock saturation computing model is given by logging.The oil saturation calculation model using variable m value is applied to 6 and 9 areas of Junggar Basin,volcanic reservoir,the calculated oil saturation than the traditional Archie equation higher 2% ~ 5% in the fracture segment,the method to calculate the oil saturation is significantly improved for volcanic reservoir evaluation,reserves calculation and geological modeling provides more accurate quantitative parameters.

关 键 词：火山岩 胶结指数 饱和度 测井解释 

分 类 号：P631.84[天文地球—地质矿产勘探]