基于二维核磁共振技术的流体性质评价方法  

Fluid property evaluation method based on two⁃dimensional NMR technology

作　　者：李怀军 李秀彬 梁晓飞 王满[2] 张小虎 徐晨阳 LI Huaijun;LI Xiubin;LIANG Xiaofei;WANG Man;ZHANG Xiaohu;XU Chenyang(Geologocal Research Institute of CNPC XDEC(Logging Engineering Branch),Karamay,Xinjiang 834000,China;Karamay Vocational&Technical College,Karamay,Xinjiang 834000,China)

机构地区：[1]中国石油西部钻探地质研究院(录井工程分公司) [2]克拉玛依职业技术学院

出　　处：《录井工程》2025年第1期91-97,共7页Mud Logging Engineering

基　　金：中国石油集团西部钻探科研项目“水淹层录井技术优选及评价方法研究”(编号:2024ZC042)。

摘　　要：核磁共振评价技术在地层流体性质识别中发挥着至关重要的作用。然而现有的一维核磁共振存在一定局限性,不同流体及赋存状态均展现在同一T2谱图内,且其赋存状态的判断受人为因素影响较大,影响了其对流体性质识别的准确程度。与之相比,二维核磁共振技术可以提供T1、T2等参数,能有效解决一维核磁共振分析方法中因不同流体信息重叠造成识别困难的问题。通过开展原始样品、饱水样品、饱锰样品条件下流体赋存状态及分布区间二维核磁共振技术实验,创建了剩余油指数流体性质识别方法。将该方法应用于准噶尔盆地9口井的9个试油层的流体性质辨识,准确识别其中8个层位的流体性质,准确率达到88.9%,提升了二维核磁共振技术在流体性质识别上的有效性。NMR plays a vital role in identifying the properties of formation fluids.However,the existing onedimensional NMR has certain limitations.Different fluids and their occurrence modes are all presented in the same T2 spectrum,and the judgment of their occurrence modes is greatly affected by human factors,which affects the accuracy of fluid property identification by mud logging technology.In contrast,twodimensional NMR technology can provide parameters such as T1 and T2,which can effectively solve the problem of identification difficulty caused by overlapping information of different fluids in onedimensional NMR analysis method.A method of identifying fluid properties with remaining oil index was created by conducting experiments on the modes of occurrence and distribution intervals of fluids under the conditions of original samples,water saturated samples and manganese saturated samples using twodimensional NMR technology.In the Junggar Basin,the method was applied to identify the fluid properties of 9 oil testing formations in 9 wells,and the fluid properties of 8 formations were accurately identified,with an accuracy rate of 88.9%,which improved the effectiveness of twodimensional NMR technology in fluid property identification.

关 键 词：二维核磁共振 流体性质 T2谱 饱锰样品 出峰位置 剩余油指数 

分 类 号：TE132.1[石油与天然气工程—油气勘探]