January 2012

Special Report: LNG/Gas Processing Developments

Overcome challenges in treating shale gases

Manipulating process plant parameters helps meet pipeline specifications

Weiland, R. H., Hatcher, N. A., Optimized Gas Treating, Inc.

Shale represents an astonishingly large, new source of natural gas and natural gas liquids (NGLs). However, a common misconception seems to be that, for the most part, shale gases are sweet and do not need to be treated. Although not highly sour in the traditional sense of having high H2S content, and with considerable variation from play to play and even from well to well within the same play, shale gas often contains tens or hundreds of parts per million of H2S, with wide variability in CO2. Gas in the Barnett shale play of North Texas, for example, contains several hundred parts per million by volume (ppmv) of H2S and several percentages of CO2—far from pipeline quality. In othe

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