煤岩特征及其对煤层气勘探开发的影响  

Petrographic Characteristics and Their Influence on Coalbed Methane Exploration and Development

作　　者：杨景芬[1] 黄兰英[1] 

机构地区：[1]中国矿业大学资源与地球科学学院,江苏徐州221008

出　　处：《山西焦煤科技》2011年第6期16-19,共4页Shanxi Coking Coal Science & Technology

摘　　要：煤岩特征分析有助于了解煤储层物性优势、优选富集高渗区域与评价单井开发潜力。基于黔西五轮山矿区煤岩和测井资料,采用地质理论与工程实践分析相结合等方法,研究了煤岩与测井响应特征,探讨了其与煤层气勘探开发的关系。结果表明,6-3,9,16号煤层机械强度可能相对于其它煤层较好,但16号煤层整体发育了碎粒煤—糜棱煤结构,显著降低了煤体结构强度及渗透性。采用直井压裂开发方案时,可选择3,5-3,6-3,8,16号等5个煤层分层射孔压裂,有利于排采增效。5号和8号煤层相对施工水平井较为有利,但单一薄煤层水平井作业可能提高产能有限,因此,煤层气井型选择应优先选择直井开发模式。16号煤层不利于水平井工程稳定性,如采用直井开采,应避开其构造煤分层。Based on the coal petrography and logging of Wulunshang mining area in western of Guizhou, the characteristics of coal petrography and logging responses were analysed, and their relationship with the exploration and development of coalbed methane by the methods of combination of geological theory and engineering practice. The result indicates that No. 6^-3, 9 and 16 coal seams maybe have a better mechanical strength, but the 16 coal seam only has a lower strength and permeability for its bad coal structure type. No. 3, 5^-3, 6^-3, 8 and 16 can be selected for gun perforation when the vertical well is chosen, which is favorable for effective drainage. No. 5 and 8 have relative advantages for the horizontal well, especially, the only thin seam cannot enhance the production. So, the development mode of verticall well should be selected for this area. The tectonic coal layer of No. 16 seam should not be chosen regardless of the development mode.

关 键 词：五轮山矿区 煤岩特征 煤层气 勘探开发 

分 类 号：TD15[矿业工程—矿山地质测量]