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热中子成像测井技术在吐哈油田的应用

Yusheng ZHANG, Kang LI,Chunhui LIU,Lingling ZHI,Xuebin WANG,Manhong ZHU

Well Logging Technology（2015）

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Abstract
热中子成像测井系统(Thermal Neutron Imaging System,TNIS)利用热中子的衰减和俘获成像图可在"三低"油藏中直观、快速、清晰地分辨油水层.TNIS技术分别在吐哈油田不同矿化度和孔隙度地层中应用,运用TNIS的中子寿命和俘获截面汇总出TNIS在吐哈油田的适用范围和条件.TNIS在吐哈油田低孔隙度(大于10％)、Cl离子浓度(大于24 000 mg/L)、低渗透率油藏中应用效果显著.随着储层有效孔隙度和Cl离子浓度的增大,TNIS可更加清晰地分辨油水层.
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Key words
imaging log,residual oil saturation,thermal neutron,capture cross section
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