应用概率统计的方法研究了小井眼钻井成本及其变化规律。
Statistic method is used to study drilling cost and its regularity changing.
高钻柱扭矩和套管过度磨损是小井眼钻井中存在的严重问题。
Heavy torque and abrasion on casing are serious problems in drilling in slim hole.
通过与常规煤层气试验井对比，分析了煤层气小井眼钻井的经济效益。
Through a comparison, the economic benefit in slim-hole drilling for coalbed gas has been analyzed.
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