The horizontal natural gas drilling boom drove a long production growth period, but that boom topped out in September 2011, and overall monthly production has remained basically flat since then, analysts at Stephen Smith Energy Associates said in their most recent Monthly Energy Outlook. And while the number of horizontal gas rigs has fallen about 70% from its peak, several effects have worked to maintain the 18-month production plateau, they said.
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机译：Stephen Smith Energy Associates的分析师在最近的《月度能源展望》中表示，水平天然气钻井的繁荣推动了较长的产量增长期，但这一繁荣在2011年9月达到顶峰，此后月度总产量一直基本持平。他们说，尽管水平天然气钻井平台的数量已从高峰期下降了约70％，但有几种效应维持了18个月的生产平稳期。
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