According to formation resistance coefficient, it has also brought forward horizontal productivity equation of water-producing gas well.

并根据地层阻力系数原理，推导出了产水气井水平井产能方程。

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According to the National Energy Administration's targets, China will import 90bn cu m of gas a year by 2015 as well as producing 170bn cu m domestically.

按照中国国家能源局(National Energy Administration)的目标，到2015年中国每年将进口900亿立方米天然气，同时国内还将生产1700亿立方米。

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In order to ensure the requirement of high anti-sulfur in Luojiazhai and Tieshan sour gas well, some casing heads and gas-producing wellheads have been imported since 2003.

为保证川东北地区罗家寨、铁山坡构造高含硫气井长期采气高抗硫要求，2003年起，从国外进口了部份套管头和采气井口。

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The assets consist of currently producing oil and gas properties, as well as approximately 500, 000 acres in Pennsylvania, Ohio and New York, which have exposure to the Marcellus, Utica and Trenton Black River exploration trends.

FORBES: Phil Anschutz Likely Makes Billions On Marcellus Shale Sale

But for shale gas, once the drill reaches the shale rock underground, the drill bit is turned horizontally to bore a well that stretches through the natural gas producing shale.

FORBES: China Closer To Joining Shale Gas Fracking Craze