Suffering from the poor resources quality,difficulty of development,lower single well production,lower well-head price,lower profitability and that aggravated by the enterprises' high capital cost and weak control of foreign cooperation blocks,domestic coalbed methane (CBM) annual production have failed to reach the previous two Five-Year Plan targets over the last decade,consequently the enterprises' investment willingness in CBM ground development has being obviously depressed for the last 3 years.In view of this,a techno-economic analysis is made of CBM ground development and production projects in typical exploration blocks with an average burial depth of 800 m.This case of economical evaluation can not only help understand the specific contribution of resources quality,technical level,well-head price,fiscal and taxation support policies,etc.,to the investment profitability of CBM ground development projects,but help government draw up the 13th Five-year Plan of domestic CBM development,especially the CBM production target of year 2020.In order to promote the quality and efficiency of sustainable development of the CBM industry,it is also recommended that (1) relevant authorities enhance the on-going support policies,including the quick stipulation of specific laws and regulations to solve the nonfeasance and delay of foreign cooperation blocks exploration and development operation,and to simplify the overall development plan examination and approval procedures hastening high-quality CBM resources to be delivered to development and production;(2) the government further raise the fiscal subsidy up to CNY0.6 yuan/m3,and impose no income tax on CBM mining enterprises;(3) more central government investment be added in major CBM-related scientific and technological projects;and (4) the direct support of central government investment be up to 20％ of the total input in deep CBM and strategic area exploration projects.If the above-mentioned supporting policies are implemented continuously well,the domestic CBM production will probably be increased up to 100× 10s m3 by year 2020,and even to 200×108m3 by year 2030.%我国煤层气赋存条件和资源品质差、开发难度较大、单井产量偏低,同时销售价格偏低、开发效益较差,加上企业资本成本高、对外合作管理不到位等不利因素的影响,两个五年计划的煤层气规划产量目标接连落空,企业在煤层气地面开发方面的投资意愿已经明显降低.为此,选用合理的经济评价方法和参数,结合煤层气开发生产的特点,模拟分析了平均埋深800 m的典型区块煤层气开发项目的技术经济性,并以此为案例,以期更好地厘清煤层气资源品位、技术水平、销售价格、财税扶持政策等因素与投资经济性的关系,有助于制订客观合理的煤层气攻关方向和产量目标.进而针对目前我国煤层气产业发展所面临的困难,提出建议:①相关部门尽快出台更进一步的产业扶持政策,解决对外合作区块开发滞后问题,促进优质煤层气资源的开发;②将财政补贴标准提高到0.6元/m3,同时免征企业所得税;③进一步加大中央财政对煤层气科技攻关专项的投入力度;④对深层煤层气和战略选区勘探项目直接给予20％的中央投资支持.这些扶持政策如果能够长期施行,将有助于实现2020年国内煤层气地面开发产量达100×108 m3、2030年达200×108m3的规划目标.
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