Improved measurement of crude oil vapor pressure via PVT study methods
- Alyeska Pipeline Service Co., Anchorage, AK (United States)
A technical task force created by owner companies of the Trans-Alaska Pipeline System (TAPS) including BP Pipelines (Alaska), and Arco Transportation Alaska, Inc., and Alyeska Pipeline Service Company (APSC), the operator of TAPS, have investigated new technology for measuring the saturated liquid bubble point vapor pressure (BPVP) of crude oils. This technology is based on Pressure-Volume-Temperature (PVT) Cell study methods and consists of an on-line Vapor Pressure Analyzer (VPA) developed by Arco Oil & Gas Company and marketed by Fluid Data (TVP-1000), and a mercury-free automated PVT lab system (RUSKA 2370 Lab System) marketed by Ruska Instrument Corporation and modified to meet APSC requirements. In this methodology, the BPVP for the multicomponent fluid crude oil is defined and approximated by the intersection of the liquid compressibility and two phase lines on the isothermal pressure-volume (PV) curve for the fluid. The Task Force finds that this new technology provides saturated liquid bubble point vapor pressure values of TAPS crude oils which differ by 15 to 95 kPa from True Vapor Pressure (TVP) values obtained using API Publication 2517, Figure 18B-Equation for of Crude Oils With A Reid Vapor Pressure of 2-15 Pounds per Square Inch and corresponding RVP data from the crude oils tested. The range in difference between the BPVP and the TVP for each of five different TAPS crude oils tested was found to be due to differences in crude oil composition. 3 refs., 1 fig., 1 tab.
- OSTI ID:
- 416406
- Report Number(s):
- CONF-960730-; TRN: 96:006485-0011
- Resource Relation:
- Conference: 5. world congress of chemical engineering, San Diego, CA (United States), 14-18 Jul 1996; Other Information: PBD: 1996; Related Information: Is Part Of The 5th World Congress of chemical engineering: Technologies critical to a changing world. Volume I: Advanced fundamentals sustainable chemical engineering technology management and transfer international regulations; PB: 1183 p.
- Country of Publication:
- United States
- Language:
- English
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