The Water Vapor Content of Essentially Nitrogen-Free Natural Gas Saturated at Various Conditions of Temperature and Pressure
- Eugene L. McCarthy (Black, Sivalls and Bryson, Inc.) | William L. Boyd (Continental Oil Co.) | Laurance S. Reid (U. Of Oklahoma)
- Document ID
- Society of Petroleum Engineers
- Journal of Petroleum Technology
- Publication Date
- August 1950
- Document Type
- Journal Paper
- 241 - 242
- 1950. Original copyright American Institute of Mining, Metallurgical, and Petroleum Engineers, Inc. Copyright has expired.
- 4.1.3 Dehydration, 4.3.1 Hydrates, 5.2.1 Phase Behavior and PVT Measurements, 1.10 Drilling Equipment, 4.6 Natural Gas
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Proper control of the moisture content of natural gas is essential toreliable operation of gas transmission and distribution facilities servingnorthern markets. The moisture content of natural gas is usually determined bydew point measurement at the existing pressure. For any gas of constantmoisture content, the dew point varies with the pressure.
A correlation of the data of several investigators is presented in graphicalform by the authors. These data were correlated by the authors and F. M.Townsend, C. C. Tsao, M. D. Rogers, Jr., and J. A. Porter, graduate students inchemical engineering at the University of Oklahoma.
Of particular interest are the hitherto unpublished low temperature dataobserved by Wickliffe Skinner, Jr., which are included in this correlation.
Presentation of Data
The problem of interpreting water dew points, or saturation temperatures, ofnatural gas in terms of specific moisture content has increased in importanceduring the past decade because of extensive developments in the transmissionand petro-chemical phases of the natural gas industry. Virtually all gastransported to northern and eastern markets must be dehydrated to a low watervapor content to prevent hydrate formation in transmission and distributionlines and resultant interruptions in gas deliveries. Complete dehydration isrequired in certain phases of the petro-chemical industry involvinglow-temperature operations.
It is a well-known fact that the water vapor content of pure hydrocarbonvapors and their mixtures at superatmospheric pressures cannot be predictedwith accuracy by assuming validity of the ideal gas laws. Earlier interest inthe general problem was concentrated on the water vapor content of purehydrocarbons and hydrocarbon mixtures in the pressure and temperature rangescommon to gas and oil producing reservoirs in order to obtain fundamental datafor the improvement of production techniques and the furtherance of reservoirstudies. Excellent data are published for pressures ranging from atmospheric to10,000 psig and for temperatures ranging from 100? to 460?F and are found to bein close agreement. However, experimental data at high pressures andtemperatures below 100?F are comparatively limited in scope.
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