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1992年底,美国有关煤层气税收优惠政策终止,许多人认为煤层气勘探将停止。的确,此后探井数量极大降低。但是,令人惊讶的是钻探工作继续进行。产量继续增加,从1992年的159亿立方米增加至1996年289亿立方米。1995年,探明的煤层气储量达到历史新记录,为2035亿立方米。美国的圣胡安和黑力士盆地是重要的生产煤层气的盆地,目前拥有多于6000口生产井。其它
At the end of 1992, the United States preferential tax policy on coalbed methane ended, and many people think that CBM exploration will cease. Indeed, the number of exploratory wells since then greatly reduced. However, it is surprising that drilling continues. Output continued to increase, from 15.9 billion cubic meters in 1992 to 28.9 billion cubic meters in 1996. In 1995, proven reserves of coalbed methane reached a historic record of 205.5 billion cubic meters. The San Juan and Hercynian basins in the United States are significant CBM production basins and currently have more than 6,000 production wells. other