Measurements of Original Pressure, Temperature and Gas-oil Ratio in Oil Sands
- K.C. Sclater (Marland Production Co.) | B.R. Stephenson (Marland Production Co.)
- Document ID
- Society of Petroleum Engineers
- Transactions of the AIME
- Publication Date
- December 1929
- Document Type
- Journal Paper
- 119 - 136
- 1929. Original copyright American Institute of Mining, Metallurgical, and Petroleum Engineers, Inc. Copyright has expired.
- 4.1.2 Separation and Treating, 5.2.1 Phase Behavior and PVT Measurements, 2.4.3 Sand/Solids Control, 1.6 Drilling Operations, 5.8.5 Oil Sand, Oil Shale, Bitumen, 1.7.5 Well Control, 4.1.5 Processing Equipment, 3.1.6 Gas Lift
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Recent progress in oil-recovery methods has brought into prominencegas-energy relations in oil sands. The greater the effort made to utilize thisgas-energy relationship to the best advantage in oil recovery, the greaterbecomes the need for more precise information concerning physical conditions asthey actually exist in an oil well.
The intelligent use of gas-oil ratios when considering production efficiencyhas been the subject of much recent discussion. It has been stressed that thepressure as well as the volume of gas must be known when considering theefficiency of a producing well on an energy basis. When methods of productionare compared on an energy basis it implies a knowledge of pressure, temperatureand physical properties of the fluids at the bottom of the well.
In questions concerning gas-lift and the pressure control of wells usuallythere is a wide variance of opinion among engineers when energy relations comeup for discussion. Perhaps this difference of opinion can be traced toerroneous assumptions made with regard to the physical conditions existingwithin the well. If erroneous assumptions are made it follows that computationsbased on these assumptions will give results which also will be in error.
That erroneous assumptions are made is not to be wondered at because whenhandling a fluid composed of gas and oil, we are dealing with a complexity ofhydrocarbon components each varying to some degree in physical and chemicalproperties. This means that the physical state of the gas and oil will dependnot only on temperature and pressure but that it will be influenced also by therelative amounts of the various hydrocarbon components present. If water ispresent the problem becomes still more complicated.
From these considerations alone it would appear that we can well afford togive some thought to devising more positive methods or means for obtaining dataon physical conditions within the well rather than depend entirely oncomputations from casinghead data.
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