偶极声波测井资料在YU地区的气层识别  

Gas-bearing Layer Identification with XMAC in YU Area

作　　者：刘有霞 裴鹏 王书 

机构地区：[1]中国石油集团测井有限公司长庆事业部,陕西西安710021 [2]中国石油集团测井有限公司测井仪器厂,陕西西安710061 [3]中国石油集团测井有限公司青海事业部,甘肃敦煌736200

出　　处：《测井技术》2007年第5期445-447,共3页Well Logging Technology

摘　　要：鄂尔多斯盆地的砂泥岩储层具有低孔隙度、低渗透率、非均质性强的特点,用常规测井进行气层识别易出现多解。用eXpress平台的岩石机械特性(MECHPROP)和地层应力(FRACMAN)分析模块处理计算XMAC交叉偶极子声波测井资料,可得到目的层段的连续岩石机械特性和地层应力剖面,进而建立起YU地区气层识别图版和解释分析量化参数。通过实例评价结果与试气结果的对比认为在YU地区,泊松比与纵波时差交会,切向应力与纵波时差交会,以及切向应力的负异常,均能较好地识别气层。The sand-shale reservoir of Erdos Basin, featuring low porosity, low permeability and high heterogeneity, often exists multi-interpretations in identifying gas-bearing layer with conventional logging data. The mechanical property of rock and formation stress profile of the objective interval have been obtained by processing XMAC （Cross Multipole Array Acoustic） data with analytical modules of MECHPROP and FRACMAN in eXpress platform, and then estab- lished are gas-bearing identification chart and quantitative parameter of the interpretation in YU Area. Conclusion of comparing practical case evaluation with gas testing result is that the gasbearing layer in YU Area can be identified by cross-plot of Poisson＇s ratio and compressional slowness, cross-plot of tangential stress and compressional slowness, as well as negative anomaly of tangential stress.

关 键 词：XMAC交叉偶极子声波测井 纵波时差 横波时差 泊松比 切向应力 气层识别 

分 类 号：P631.64[天文地球—地质矿产勘探]