我国煤层气的开发模式研究  

Coal-bed Methane Development Modes in China

作　　者：穆福元[1] 贾承造[2] 穆龙新[2] 杨焦生[1] 

机构地区：[1]中国石油勘探开发研究院廊坊分院,河北廊坊065007 [2]中国石油勘探开发研究院,北京100083

出　　处：《非常规油气》2014年第1期41-46,共6页Unconventional Oil & Gas

基　　金：国家科技重大专项"我国煤层气发展战略和政策研究"(2011ZX05043-006);中国石油天然气集团公司专项"澳大利亚中煤阶煤层气有利储层预测和SIS水平井开采技术研究与应用"(2011E-2509)资助

摘　　要：煤层气是吸附于煤层的吸附气,其开发机理及开发结束后储层(煤炭)的开发利用,煤层气都要比常规油气藏复杂得多。2013年我国的煤层气产量为30×10~8m^3,预计今后将在沁水、鄂尔多斯东缘、蜀南—滇东—黔北、长庆、西北、东北等地建设六大煤层气产业基地,高峰产量达到(350~450)×10~8m^3,因此开展我国煤层气的开发模式研究,对促进我国煤层气的科学开发具有一定的引导作用。在总结我国沁水盆地、鄂尔多斯盆地东缘、蜀南地区、阜新、铁法等地煤层气开发历史经验和教训的基础上,给出了煤层气开发层系组合的原则和开发井距的优化方法,提出了符合我国煤层气地质特征的3种开发井型模式、3种布井模式和4种采气速度模式。由此可知:煤层气的开发层系划分要比油田和气田严格得多,其开发层系划分具有"七个"不能组合在一起的原则;我国煤层气的开发井型主要是水平井+丛式井+直井;煤层气的合理布井方式是在构造的顶部少布井、翼部多布井、鞍部不布井,井网形态和井距、排距应该依据煤层气的地质参数进行技术经济优化;我国煤层气的采气速度应该和煤炭生产紧密结合,按照提出的模式协调发展。The CBM （Coal-Bed Methane） is the gas adsorbed on coals. It is more complex than conventional oil and natural gas not only in development mechanism, but also in taking advantage of reservoir （coal） after CBM abandonment. The China CBM production rate in 2013 is about 3 Billion cubic meters, it is forecasted that six CBM production bases in Qinshui, east of Ordos, south of Sichuan-east of Yunnan-north of Guizhou, Changqing, China south-north, China east-north, will be built. The peak-production rate will reach to 35-45 Billion cubic meters, and it is believed that this paper will play a very important role in guiding China CBM development scientifically. After summarizing the experience and lessons in Qinshui basin, east of Ordos basin, south of Sichuan-east, Fuxin, Tiefa CBM development, the general principles of CBM classification and combination and the optimizing method of development distance have been given. The three major development wells types, three wells spacing types in different areas, and four gas production rate types in different coal mining period have been proposed. It concludes that the division and combination of CBM of development is more strict than conventional oil and gas, and it would not adapted to combination in ＂the seven types＂; The China CBM development wells types is horizontal, multiple, and vertical wells; The reasonable wells spacing is less at the tops of structure, more at wings, and zero at saddles, and we must optimize the wells arranging pattern, distance between wells with technical economy method based on its own geological parameters;The China CBM reasonable production rate should consider coal production.

关 键 词：煤层气 开发模式 开发层系 开发井型 布井模式 井距 采气速度 

分 类 号：TE37[石油与天然气工程—油气田开发工程]