井下随钻核磁共振流体分析装置设计与试验验证

Design and Test Verification of NMR Fluid Analysis Device for Downhole Logging While Drilling

李新 米金泰 张卫 姚金志 李三国

LI Xin MI Jintai ZHANG Wei YAO Jinzhi LI Sanguo

中国石化石油工程技术研究院，北京 100101 中石化胜利石油工程有限公司地质录井公司，山东东营 257064

Sinopec Research Institute of Petroleum Engineering, Beijing, 100101, China Geologging Company, Sinopec Shengli Oilfield Service Corporation, Dongying, Shandong, 257064, China

为了在随钻条件下对井下地层流体类型及特性进行原地实时分析，以井下随钻应用为约束条件，提出了井下随钻核磁共振流体分析方法，仿真分析了钻铤尺寸约束下的物理空间，优化了小型核磁共振分析装置设计方案；在此基础上，研发出适于钻铤空间条件的小型核磁共振流体传感器，并制作了全尺寸井下随钻流体核磁共振分析仪短节原型机。井下流体样品的T2谱试验结果表明，不同流体信号具有明显的响应特征和高信噪比。井下随钻核磁共振流体分析装置为井下流体分析提供了一种新的测试方法，也为核磁共振技术在井下随钻测量中的应用奠定了基础。

In order to analyze the type and characteristics of downhole formation fluid in situ under LWD conditions, an analysis method for downhole NMR fluids while drilling has been advanced under the constraining condition of LWD applications, so as to simulate the physical space at the constraint of drill collar size and optimize the design of small NMR analyzer. On this basis, a small NMR fluid sensor suitable for the space condition of downhole drill collar was developed. Then the team created a full-size prototype of a downhole fluid-while drilling NMR analyzer. The T2 spectrum experiment results of downhole fluid samples showed that different fluid signals had obvious response characteristics and high signal-to-noise ratio. Downhole NMR fluids analyzer while drilling can provide a new and effective test method for downhole fluid analysis, and they lay a foundation for the application of NMR technology in downhole LWD.

国家科技重大专项“低渗透储层高精度随钻成像技术研究”（编号：2016ZX05021-002）和国家重大科研仪器研制项目“极端环境核磁共振科学仪器研制”（编号：21427812）联合资助

https://doi.org/10.11911/syztjs.2020027