大庆探区煤层气资源综合利用策略

Strategy for Comprehensive Utilization of CBM Resources in Daqing Exploration Area

通过对比大庆探区含煤盆地与美国煤层气商业开发成功盆地异同,在深入分析煤层气资源特点基础上,提出了大庆探区煤层气资源综合利用对策:勘探目标优选突出新思路,推进5个转变,即"研究方向定位,由煤田地质向综合地质转变;目标优选方法,由地质成果向综合成果转变;资源类型选择,由煤层气向煤成气转变;布井方式确定,由单井向井组转变;综合效益评价,由工业气流向商业价值转变",不断追求煤层气资源"甜点"目标准确圈定和合理实施;相关工程实施突出新技术,强化5项应用,即"‘二宽一高’地震预测煤层技术、多方式钻完井技术、多方法气层综合评价技术、多参数实验室分析技术、简型高效压裂排采技术",切实满足煤层气资源客观评价和有效探采;生产经营管理突出新机制,探索5方面实践,即"低成本工程、一体化模式、油煤联合、对外合作、小公司运作",全面促进煤层气资源综合利用效益最大化。

Through comparing the coal bearing basins in Daqing exploration area and those successfully developed in the United States, on the basis of in-depth analysis about the characteristics of CBM resources, this paper put forward the measures for comprehensive utilization of CBM resources in Daqing exploration area: stressing new idea in terms of exploration target selection and promoting five transformations, i.e. òthe orientating of research targets is transformed from coalfield geology to coal-derived gas geology; the method for target selection is transformed from geological results to integrated ones; the selecting of resource types is transformed from CBM to coal-derived gas; the determination of hole pattern is transformed from single well to well group; the evaluation on overall profits is transformed from industrial air stream into commercial valueó, pursuing accurate selection and reasonable implementation of òdessertó CBM resource targets; focusing on new techniques for the implementation of related projects and intensifying five applications, i.e. the technique for òwide-azimuth, wide-band, and high-densityó seismic prediction of coal bed, the multi-way drilling and completion technique, the multi-method technique for comprehensive evaluation of gas layers, the multi-parameter lab analysis technique, and the simple high- efficiency fracturing and drainage technique, to satisfy objective evaluation and efficient exploration and mining of CBM resources; laying emphasis on new mechanism for production, operation and management and exploring practice in five aspects, i.e. òlow-cost projects, integrative model, oil and coal combination, foreign cooperation, and operation of small companiesó, so as to maximize the benefits of comprehensive use of CBM resources in an all-round way.