Modeling of Slug Dissipation and Generation in Gas-Liquid Hilly-Terrain Pipe Flow
Author:
Zhang Hong-Quan1, Al-Safran Eissa M.1, Jayawardena Subash S.2, Redus Clifford L.3, Sarica Cem4, Brill James P.4
Affiliation:
1. TUFF, The University of Tulsa, 600 S. College Ave., Tulsa, OK 74104 2. Shell Global Solutions US Inc., 3333 Highway 6 S., Houston, TX 77082 3. Redus Engineering, 612 Ingram Rd., Devine, TX 78016 4. TUFFP, The University of Tulsa, 600 S. College Ave., Tulsa, OK 74104
Abstract
Hilly-terrain pipelines consist of interconnected horizontal, uphill and downhill sections. Slug flow experiences a transition from one state to another as the pipe inclination angle changes. Normally, slugs dissipate if the upward inclination becomes smaller or the downward inclination becomes larger, and slug generation occurs vice versa. Appropriate prediction of the slug characteristics is crucial for the design of pipeline and downstream facilities. In this study, slug dissipation and generation in a valley pipeline configuration (horizontal-downhill-uphill-horizontal) were modeled by use of the method proposed by Zhang et al. The method was developed from the unsteady continuity and momentum equations for two-phase slug flow by considering the entire film zone as the control volume. Computed results are compared with experimental measurements at different air-mineral oil flow rate combinations. Good agreement is observed for the change of slug body length to slug unit length ratio.
Publisher
ASME International
Subject
Geochemistry and Petrology,Mechanical Engineering,Energy Engineering and Power Technology,Fuel Technology,Renewable Energy, Sustainability and the Environment
Reference22 articles.
1. Zhang, H.-Q., Jayawardena, S. S., Redus, C. L., and Brill, J. P., 2000, “Slug Dynamics in Gas-Liquid Pipe Flow,” ASME J. Energy Resour. Technol., 122, pp. 14–21. 2. Hill, T. J., Fairhurst, C. P., Nelson, C. J., Becerra, H., and Bailey, R. S., 1998, “Multiphase Production Through Hilly-Terrain Pipelines in Cusiana Oilfield, Colombia,” SPE 36606, presented at SPE ATCE, Denver, Colorado (October 6–9, 1996). 3. Sun, J. Y., and Jepson, W. P., 1992, “Slug Flow Characteristics and Their Effect on Corrosion Rates in Horizontal Oil and Gas pipelines,” SPE 24787, presented at SPE ATCE, Washington, DC. (October 4–7, 1992). 4. Taitel, Y., and Barnea, D., 1990, “A Consistent Approach for Calculating Pressure Drop in Inclined Slug Flow,” Chem. Eng. Sci., 45(5), pp. 1199–1206. 5. Scott, S. L., 1987, “Modeling Slug Growth in Pipelines,” Ph.D. Dissertation, U. of Tulsa, Tulsa. OK.
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