This paper is written with the intention of promoting collaboration in standardizing a methodology for collecting and handling natural gas samples when using portable chromatography to determine calorific value. It is important to reinforce established collection techniques, and to apply theory described in accepted industry standards. Dynamic field conditions, mechanical constraints, and human intervention are all factors that impact the quality of samples collected and the ensuing analysis. Proper sample conditioning and transport are fundamental requirements to ensuring quality analysis is obtained from the data acquisition process. Collection principles must be understood and practiced when relying on a portable chromatograph to determine Btu content. Technician education on the physical and chemical properties involved in the process will increase conscience awareness of potential influences, and improve the quality and repeatability of sample collection. Technical error can be minimized by adopting and following a standardized protocol. Implementing proven engineering practices at the extraction point improves overall operational reporting, and ensures critical downstream processes can be performed with confidence. Downstream processes, such as allocations, producer imbalance tracking, regulatory reporting, producer and royalty distributions all require accurate, timely, and reliable BTU content to ensure the proper disposition and reporting of the gas volumes produced.
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