【作者】 唐巨鹏；

【导师】 潘一山；

【作者基本信息】 辽宁工程技术大学 ， 工程力学， 2006， 博士

【摘要】 煤层气是21世纪的战略性接替能源，其开发受到了世界各国的高度重视。由于我国特殊的地质条件，至今还没有建立一套符合我国国情的煤层气赋存运移理论，且已有理论还远没有达到机理清晰、规律明确的程度，急需用新的实验手段加以验证和完善。核磁共振成像技术(简称NMRI)作为一种先进的无损检测技术为此提供了崭新的技术途径。本文从新的实验角度出发，首次将核磁共振成像技术引入煤层气赋存运移规律研究领域，通过相关理论研究和直观、实时地实验观测，揭示煤层气在煤层中赋存运移机理，完善煤层气在煤层中赋存运移理论，从而寻求提高我国煤层气产量的技术措施，因此对我国煤层气开发具有重大的实际应用意义和理论价值。论文主要研究内容如下： 1、在前人基础上，详细并系统论述了煤层气成臧、赋存和运移机理及其相关因素的影响规律，在此基础上明确提出了煤层气产出过程中存在三效应主导作用阶段(有效应力、基质收缩和滑脱效应)； 2、自主设计并研制完成了具有实用新型专利的、由非磁性聚碳酸酯材料制成的自压式三轴渗透仪，该渗透仪可同时改变围压、轴压和孔隙压，即实现三维应力状态； 3、利用自主研制完成的非磁性三轴渗透仪进行了煤层气解吸渗流特性实验研究，得到了新的煤层气解吸特性、渗流特性与有效应力间关系等的实验结论，验证了煤层气三效应主导作用阶段的存在，从而为煤层气赋存运移规律的NMRI实验提供了前期实验基础和信息； 4、在阐述NMRI机理的基础上，重点进行了煤和煤层气NMRI机理研究，揭示了NMRI的本质含义，分析了煤和煤层气NMRI性质，给出了煤层气NMRI成像测量方法； 5、将核磁共振成像理论与煤层气赋存运移理论相结合，建立了煤储层核磁渗透率模型，进行了煤层气微观扩散机理NMRI理论研究，给出了菲克扩散系数与核磁扩散系数间关系； 6、将装有煤试件的三轴渗透仪置于核磁共振成像仪磁体腔中，进行了自然状态下煤试件的NMRI实验、饱和水煤试样的核磁渗透率测定实验、气驱水NMRI实验、水驱气NMRI实验，期间根据情况选择了原煤试件和型煤试件，直观、实时观测了水在煤试样中的渗流过程、气驱水过程和水驱气过程，得到了大量具有实际工程价值的实验结论。更多还原

【Abstract】 Coalbed methane （in short as CBM） is the strategic alternative energy in 21^st century. Its exploitation is highly emphasized all over the world. As the special geological conditions in China, the theory of storage and transport of CBM which is to fit Chinese situation has been not established until now. And the existed theories are not clear and definite in the mechanism and rule. So new experiment method to test the theories is needed at urgent. Nuclear Magnetic Resonance Imaging （NMRI） as an advanced non-damaged measurement technique provides a new research way. From the new experimental view, novelly the NMRI technique was introduced into the research of storage and transport of CBM. The coherent theories were studied and the NMRI experiments were real-time and visually measured. The mechanism of storage and transport of CBM was disclosed. The theory of storage and transport of CBM was expanded and tested. According to the research of theory and experiment, the effective technical measures to improve the output of CBM will be found. The research has important practical application significance and theoretical value. The main research contents as followings:1. Based on the predecessor’s achievement, the mechanism of generation, storage and transport of CBM and interact laws of the relative factors were expounded. The three mastering functions stages （effective stress, matrix shrinkage and slippage effect） in the process of CBM exploitation were presented;2. The triaxial osmoscope made up of non-magnetic polycarbonate material was designed and developed. The home-made osmoscope has neotype utility patent in China and the confining pressure, axial pressure and pore pressure can be changed at the same time. It is to say that the osmoscope can realize the three-dimensional stress state;3. Using the home-made osmoscope, the experiments of characteristics of desorption and seepage of CBM were made. Through the experiments, the new更多还原