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Title: Determining Hydrocarbon Dew Point Per Gas Chromatographic Analysis And Equations Of State
Author: Shane Hale
Source: 2012 International School of Hydrocarbon Measurement
Year Published: 2012
Abstract: The determination of the hydrocarbon dew point (HDP) for natural gas has recently become a critical issue for the natural gas industry because of the rapid expansion of interconnecting pipelines and the rise of the liquefied natural gas (LNG) as an international source of natural gas. Whereas previously the gas in a pipeline would come from a small number of known producers, the gas flowing through the pipeline today could have come from many varied sources including traditional gas plant producers (de-hydration, CO2, H2S and N2 control and removal of condensates), coal bed methane producers (98% methane), low cost producers (de-hydration only) or global exporters of LNG. Economic factors have also played a role in the changing quality of the gas. Unfavorable natural gas/NGL product price spread historically have resulted in HDP concerns for pipeline operators as producers who previously have stripped the heavier components out of the gas to produce condensates have realized a greater return by leaving the higher energy value heavy components in the export natural gas. In todays environment, the spread is very large so producers are focusing on extracting rich-gases (especially in the shale-gas plays) to remove the NGLs in the process and during process upsets rich gas may be sent through to the natural gas pipeline.

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