二连油田中低孔隙度地层介电测井解释方法研究  

Dielectric Log Interpretation Method of Middle-low Porosity Reservoir in Er Lian Oilfield

作　　者：高瑞琴 剡慧君 朱爱民 罗学东 王慧 伍妍红 朱丽丽 高燕 

机构地区：[1]中国石油集团测井有限公司华北事业部,河北任丘062552

出　　处：《测井技术》2009年第5期457-460,共4页Well Logging Technology

摘　　要：二连油田宝饶内带储层一般为中低孔隙度特征,应用介电测井对储层的流体性质进行定量解释受到限制,实际生产中以定性解释为主。以介电测井理论为基础,系统分析了孔隙度、相移角、含水饱和度、泥质含量等参数对介电测井的影响,提出了利用相移角资料和定义含水指数判断储层流体性质的方法。考虑到泥岩束缚水含量较高,相移角受孔隙度、含水饱和度、泥质含量等参数的影响明显,在利用相移角进行定量解释时,认为相移角的测量值是岩石骨架、流体、泥质几部分的加权和,在不同的含水饱和度条件下作相移角与孔隙度的交会图。当含水饱和度大于10.7%时孔隙度与相移角为正比关系;当含水饱和度小于10.7%时孔隙度与相移角成反比关系。无论储层的孔隙度、相移角数值为多少,具有相同含水饱和度的资料点的斜率是相同的,即可以用资料点的斜率代替含水饱和度。The reservoir of Baorao intrazone in Er Lian oilfield is of middle-low porosity, the dielectric logging is accordingly restricted in its quantitative interpretation, and usually limited to qualitative identification. Based on the theory of dielectric logging, analyzed is the influence of porosity, water saturation, phase-shift angle, shale content, etc. on dielectric logging. Also, provided is a method of fluid identification with phase shift angle and the definition of watercut index. Since shale irreducible water content is higher and influence of porosity, water saturation and shale consent on the phaseshift angle is heavier, measurement of the angle should be the weighted sum of matrix, fluid and shale when using the angle for quantitative log interpretation. The crossplot between the angle and porosity is given under the condition of different water saturations. The shale consent has clear influence on the dielectric log, which should be considered in log data interpretation. When the shale content are different, data point slope of water saturation remains the same, only the curve intercept has a lot of changes. When the water saturation is a bove 10. 7%, the porosity is directly proportional to the phase-shift angle; but when the saturation is below 10. 7%, the porosity is inversely proportional to the angle. No matter how many the porosity and angle are, the data point slope of the same water saturation is the same, so the slope may replace the saturation.

关 键 词：测井解释 介电测井 介电常数 相移角 含水指数 二连油田 

分 类 号：P631.84[天文地球—地质矿产勘探]