浅析核磁共振测井在储层流体性质识别方面的局限性  

Analysis of Limitation in Reservoir Fluid Identification by Using Nuclear Magnetic Resonance Logging

作　　者：邵维志 贵兴海 郝丽萍 李俊国[3] 朱伟峰[3] 刘洪波 唐建军 

机构地区：[1]中国石油渤海钻探工程有限公司测井分公司,天津300280 [2]中国电子科技集团公司第二十二研究所,河南新乡453003 [3]大港油田勘探开发研究院,天津300280

出　　处：《测井技术》2014年第6期684-689,703,共7页Well Logging Technology

摘　　要：核磁共振测井利用标准T2谱法、移谱法、差谱法以及由移、差谱演变产生的一些方法,在油气田的勘探开发中提供不依赖于电性的储层流体性质评价。针对评价中存在的问题,研究了不同评价方法的影响因素,结合实例分析了核磁共振技术识别储层中天然气、不同黏度原油、水的局限性。原油黏度、孔隙结构以及长、短回波间隔和长、短回波等待时间选择是否合理是影响核磁共振技术识别储层流体性质准确性的主要因素。不同黏度的原油在相似的孔隙结构下或相似黏度的原油在不同孔隙结构下都需要使用不同的评价方法和测量模式,才能更好地识别油层和水层。Nuclear magnetic resonance logging presents oil and gas identification methods independent of resistivity by using standard T2 spectrum,shift spectrum,difference spectrum and some other methods developed by the above mentioned methods in oil and gas exploration and development.To solve the problems existing in log evaluation,we studied the influencing factors of different evaluation methods.Combining with log examples,we analyzed the limitations of magnetic resonance technique in identification of reservoir of natural gas,crude oil and water with different viscosities.The viscosity of crude oil,pore structure and the selection of TE or Tw reasonable or not is the main factor affecting the magnetic resonance technology of reservoir fluid property identification accuracy.Different evaluation methods and measurement mode are required to use the different viscous crude oil in similar pore structure or similar viscous crude oil in different pore structures to better identify oil and water.

关 键 词：核磁共振测井 标准T2谱法 移谱法 差谱法 原油黏度 孔隙结构 流体性质识别 

分 类 号：P631.84[天文地球—地质矿产勘探]