利用泊松比和流体压缩系数重叠包络线法识别气层  

Identification of Gas Reservoirs by Overlapping Envelope Area with Poisson's Ratio and Fluid Compressibility

作　　者：桂俊川 夏宏泉[1] 杨双定 弓浩浩[1] 

机构地区：[1]西南石油大学油气藏地质与开发工程国家重点实验室,四川成都610500 [2]中国石油集团测井有限公司长庆事业部,陕西西安710201

出　　处：《测井技术》2015年第1期114-118,共5页Well Logging Technology

摘　　要：泊松比和流体压缩系数对储层的响应特征非常敏感,相对于水层,气层的泊松比会明显减小,流体压缩系数明显增大。利用泊松比和流体压缩系数的这一反向变化特征,在同一曲线道中合理刻度归一化后的泊松比和流体压缩系数曲线,可以形成明显的镜像包络线。通过计算包络线面积并结合对应的现场试气产量可以得到用于定量识别气层的关系图版。该方法应用于S气田二叠系砂泥岩储层的气层识别中取得了良好的判识效果,拓宽了工区利用测井资料识别低孔隙度低渗透率低压储层流体性质的途径。Poisson＇ s ratio and fluid compressibility are very sensitive to reservoir responses. Compared with the aquifer, the Poisson^s ratio in the gas reservoir significantly reduces and fluid compression factor significantly increases. Because the Poisson＇s ratio and fluid compressibility change oppositely in gas reservoirs, normalized Poisson＇s ratio and fluid compressibility factor scaled in the same channel can form a clear envelope. By calculating the envelope area and combined with the corresponding test gas production, we can get plates which can be used to quantitatively identify gas reservoirs relationships. Application of the above method to the S gas field in Permian sand-shale reservoirs shows good effect, and broadening the fluids identification of reservoir with low porosity, low permeability and low formation pressure.

关 键 词：测井解释 气层识别 泊松比 流体压缩系数 包络线面积 产量 

分 类 号：P631.84[天文地球—地质矿产勘探]