摘要
川南煤田大村矿段煤层气地面抽采试验井DCMT-3排采曲线特征显示见气较快,达到工业产能时间(高于1000m3/d)超过6个月,且降产幅度缓慢,属低产稳定型煤层气井,已累计产气超过50万m3。依据DCMT-3井生产期间的产气量、压力等变化规律,通过储层特征、经济投入分析认为,大村矿段煤层气具有较好的商业开发前景。建议采用同走向不同水平线状布井,加快开展清洁压裂液试验,以提高单井或井组产能,将发挥综合社会经济效益,实现古叙矿区等煤田的安全开采。
The drainage curve characteristics of CBM surface exploitation test well in the Dacun sector, South Sichuan coalfield have revealed fast CBM intersection, over 6 months of industrial capacity （≥ l000m3/d） reached duration, and slower capacity reducing range, thus belong to low-yielding and steady type CBM well, cumulative production of CBM over half million cubic meters. On the basis of CBM output and pressure variation patterns, analyzed reservoir characteristics and economic investment, have considered that the CBM in Dacun sector has better commercial development prospect. Suggestions of different level linear well spacing along the strike, speeding up clean fracturing fluid testing to improve single well or well group capacity, thus can exert integrated social and economic benefits, realize safe coal mining in the Gulin-Xuyong mining area and other coalfields.
出处
《中国煤炭地质》
2012年第1期13-16,共4页
Coal Geology of China
关键词
DCMT-3井
低产稳定型
含煤层气系统
线状布井
清洁压裂液
DCMT-3 well
low-yielding and steady type
CBM-bearing system
linear well spacing
clean fracturing fluid
