Flash Calculations as Performed on the IBM Card Programmed Calculator
- Elliott I. Organick (United Gas Corp.) | Henry I. Meyer (United Gas Corp.)
- Document ID
- Society of Petroleum Engineers
- Journal of Petroleum Technology
- Publication Date
- May 1955
- Document Type
- Journal Paper
- 9 - 13
- 1955. Original copyright American Institute of Mining, Metallurgical, and Petroleum Engineers, Inc. Copyright has expired.
- 4.1.2 Separation and Treating, 4.6 Natural Gas, 5.3.4 Integration of geomechanics in models, 4.1.5 Processing Equipment, 4.1.9 Tanks and storage systems, 5.2 Reservoir Fluid Dynamics
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One of the fundamental and perhaps most tedious of all calculations in petroleum engineering has been the so-called "flash calculation." High speed computing machines have been playing an increasingly important role in the oil industry, and it is natural that one of our first job assignments for these machines would be to relieve the engineer by performing flash calculations for him.
One of the machines currently available which is particularly suitable for this work is the International Business Machines Corp. Card Programmed Calculator, or CPC. Two CPC procedures developed for flash calculations are reported. In each case the machine is made to print a composite, compact, and accurate record of the entire calculation (see Figs. 1 and 2).
The first procedure, or program, is applicable primarily for separator calculations. This program may be used conveniently and efficiently in calculating optimum separator pressures and temperatures in single and in series staging of well effluent feed streams of up to 11 components. Machine time is four minutes per stage. The second program is designed primarily for reservoir flash calculations at elevated pressures or for process calculations at very low temperatures where the equilibrium constants vary significantly with the composition of the feed stream. This latter method will handle mixtures containing up to in 20 components in seven minutes of machine time.
During the past three years there has been generated an enormous interest among engineers and scientists regarding the application of high speed digital computers to the solution of problems of research and industry. Computer manufacturers have managed to keep pace with this interest by developing machines capable of handling economically the most prodigious of calculations conceived by would-be customers. In general. however, these machines, announced by more than 15 manufacturers, are not yet generally available and will not be for at least another year.
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