核磁共振T2谱提取研究.doc

核磁共振测井T2谱提取方法研究 摘 要：核磁共振测井技术是上个世纪九十年代世界测井行业的重大技术进步之一，为复杂油气藏勘探开发提供了全新的解决方案。MREx核磁共振测井仪是我国引进的先进核磁共振测井仪器。由于该仪器推出较快，硬件和软件都不完善，且由于处理解释软件所适用的地质条件跟我国实际也有较大差异等原因，在数据处理和解释中遇到了一些难题。如果这些问题不解决，必将大大影响该技术在我国的应用。 数据提取和原始回波串生成方面，对MREx仪器探测特性、观测模式、数据记录格式等方面进行了剖析，弄清了数据采集及存储细节，实现了对原始记录信息的提取。对MREx核磁数据回波生成一系列关键技术，包括相位校正、标准组组合、回波叠加、时深转换等进行了研究，掌握了从时间域原始信号到深度域的回波串信号的处理技术。 关键词：核磁测井；T2谱；MREx；回波  Study on The Extraction Method of NMR T2 Spectrum Abstract: Nuclear Magnetic Resonance logging technology is a major progress of well logging industry in the 1990s. It provides new answers to hydrocarbon exploration and development in complex reservoirs. MREx nuclear magnetic resonance logging is an advanced one，which is imported from foreign Companies. Because this tool is launched in a short time， both hardware and software of this instrument are imperfect， and geological conditions are different in and out of China，some problems， maily on the data processing and interpretation， are encountered，If these problems are not solved，will greatly influence the application of this technology in China. In data extraction and echo generation aspects， the feature， activation， data recording format of MREx tool are analyzed. Making clear data acqusition and storage details， original record data are extracted. A series of key technologies of echo generation from MREx original data are formed， including phase-correction， echo stack， standard echo combinations， time-to-depth conversion， etc. The original orhogonal signals in time domain are processed to echo signals in depth domain. Key words: Well Logging Tool ; T2 Spectrum ; MREx ; Echo  目 录 1 前言 1 1.1 核磁共振发展史 1 1.2 国内外研究现状 1 1.3 核磁共振研究目的及意义 3 2 核磁共振的原理 5 2.1 核磁矩与自旋角动量 5 2.2 经典力学观点与量子力学观点 5 2.3 核磁共振测井的计算方法 7 3 核磁共振测井的仪器 10 3.1 核磁共振测井的仪器的发展 10 3.2 MRIL—Prime仪器介绍 11 4 MREx回波信号生成处理技术研究 13 4.1 MREx核磁共振测井仪器简介 13 4.2 MREx数据采集观测模式 14 4.2.1 PP、PP Basic观测模式 15 4.2.2 PP Oil观测模式 16 4.2.3 PP Gas观测模式 18 4.3 MREx数据记录方式 19 4.4 各组回波生成技术 20 4.5