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Method and apparatus for reservoir fluid characterization in nuclear magnetic resonance logging
Method and apparatus for reservoir fluid characterization in nuclear magnetic resonance logging
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机译:核磁共振测井中储层流体表征的方法和装置
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摘要
A method and apparatus for obtaining a parameter of interest relating to a region proximate a nuclear magnetic resonance (NMR) logging tool suitable for subterranean well logging is disclosed. The nuclei of the region are subjected to a pulsed NMR technique and are productive of NMR logging data, the nuclei of the region characteristically having a longitudinal relaxation time TSUB1 /SUBdistribution and an apparent transverse relaxation time TSUB2app /SUBdistribution. In response to the NMR logging data, an R distribution is defined as R=TSUB1/SUB/TSUB2app/SUB, the TSUB2app /SUBand R distributions are processed as separate bins, along with the NMR logging data, according to a two-dimensional inversion model, and a signal intensity map of R versus TSUB2app /SUBis provided that is representative of the parameter of interest relating to the region. In response to a high-intensity signal on the map being within a first range of TSUB2app /SUBvalues and a first range of R values, the presence of a light hydrocarbon within the region is identified.
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机译:公开了一种用于获得与适用于地下测井的靠近核磁共振(NMR)测井仪的区域有关的感兴趣参数的方法和设备。对该区域的核进行脉冲NMR技术并产生NMR测井数据,该区域的核特征在于具有纵向弛豫时间T 1 SUB>分布和表观横向弛豫时间T 2app SUB>分布。响应NMR测井数据,R分布定义为R = T 1 SUB> / T 2app SUB>,T 2app SUB>和R分布为根据二维反演模型,将其与NMR测井数据一起作为单独的处理箱进行处理,并提供R相对于T 2app SUB>的信号强度图,该信号强度图表示与该区域。响应于地图上的高强度信号在T 2app SUB>值的第一范围和R值的第一范围内,识别该区域内轻烃的存在。
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