外煤层气开发毕业论文

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1、摘 要 摘 要 煤层气作为非常规天然气，是近年来在国际上崛起的洁净优质能源。我国煤 层气储量可观，储层微孔和裂缝发育，储层渗透率、压力及含气饱和度均偏低， 煤岩表面常带有负电荷；为了较好的开发煤层气储层，钻井液应当具有较强的封 堵性和抑制性、合理的密度值和 pH 值，较低的表面张力。本课题以煤层气储层 为对象，以我国储层特点及其应对举措为出发点，通过采取文献调研、系统分析 等方法，对与煤层气储层配伍的保护储层的钻井液体系的早期发展、现今状况、 做出系统的介绍，并对其未来创新趋势做出展望。 关键词 煤层气储层；钻井液体系；储层保护 Abstract Abstract Coalbed Methan

2、e (CBM), known as an unconventional natural gas, having the advantages of being clean and high quality, rises rapidly in the international community in recent years. The geological reserves in our country are considerable, meanwhile, the microspores and fractures in the CBM reservoir are well develo

3、ped in China. The reservoir has plenty of characteristics, such as the lower permeability, the lower pressure and the lower gas saturation of the reservoir, and the surface of coal and rocks always have negative electric charge. In order to develop CBM reservoir successfully, the drilling fluids sho

4、uld have strong sealing and inhibition properties, reasonable density and pH value, fairly low surface tension. The CBM reservoir was used to be as the experimental subject in this paper while making the characteristics of the reservoir and the corresponding methods be as the starting point and utilizing the method, which combined the literature research and the system analysis. Meanwhile, the early development, the present situation of the drilling fluid systems which were compatible with the C