倾斜井非均匀地层的阵列侧向测井响应研究  

Study on the Array Laterolog Response of Heterogeneous Formation in Deviated Well

作　　者：邓少贵[1] 徐悦伟[1] 蒋建亮[1] 

机构地区：[1]中国石油大学地球资源与信息学院,山东青岛266555

出　　处：《测井技术》2010年第2期130-134,共5页Well Logging Technology

基　　金：国家科技重大专项资金资助(2008ZX05035-02);中央高校基本科研业务费专项资金资助(09CX04001A);山东省自然科学基金(Y2007F25)

摘　　要：为研究倾斜井非均匀地层阵列侧向测井响应特征,采用三维有限元方法进行阵列侧向测井响应数值模拟,并利用Marquardt方法进行阵列侧向的测井多参数反演分析。研究表明,井斜造成测井曲线的地层视厚度增大;直井阵列侧向测井响应可以较好地反映目的层电阻率信息,而斜井的阵列侧向测井响应同目的层电阻率相差较大;直井条件深浅阵列侧向电阻率可以较好地反映泥浆侵入特征,倾斜井阵列侧向的深浅视电阻率幅度差异不能直观显示泥浆的侵入特征;基于Marquardt方法的斜井条件的阵列侧向测井四参数反演,有效恢复了地层真实的泥浆侵入及相应的电阻率分布特征。斜井阵列侧向测井响应模拟分析,有助于正确认识斜井井周岩石物理特征和利用阵列侧向测井进行倾斜井储层评价。In order to study the characteristics of array laterolog response of heterogeneous forma- tion in deviated well, the three dimensional finite element method is used to simulate the array laterolog response, and the multi-parameter inversion of the array lateral log is carried out based on Marquardt method. It shows that the apparent thickness of layers increases in the deviated well. The array laterolog responses reflect the actual resistivity of the target formation in vertical wells~ however the log responses differ from the actual characteristics of reservoir in deviated well. In vertical wells the characteristics of mud invasion can be reflected by the deep and shallow apparent resistivities; however the differences between deep and shallow array laterolog apparent resistivity can＇t be used to intuitively show the mud invasion characteristics in deviated wells. Based on the Marquardt method, the four-parameter inversion of array laterolog resistivities is done, which effectively restore the actual characteristics of the mud invasion of formation and its corresponding resistivity distribution of formation in a deviated well. The study of array lateral log response is helpful to understand the physical characteristics of rocks around the borehole and to evaluate the reservoir reasonably by array laterolog in deviated wells.

关 键 词：阵列侧向测井 斜井 非均匀地层 测井响应 反演 Marquardt方法 

分 类 号：P631.84[天文地球—地质矿产勘探]