Visualization of Solution Gas Drive in Viscous Oil, SUPRI TR-126

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Description

Several experimental studies of solution gas drive are available in this report. Almost all of the studies have used light oil. Solution gas drive behavior, especially in heavy oil reservoirs, is poorly understood. Experiments were performed in which pore-scale solution gas drive phenomena were viewed in water/carbon dioxide and viscous oil/carbon dioxide systems. A new pressure vessel was designed and constructed to house silicon-wafer micromodels that previously operated at low (<3 atm) pressure. The new apparatus is used for the visual studies. Several interesting phenomena were viewed. The repeated nucleation of gas bubbles was observed at a gas-wet site occupied ... continued below

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75 pages

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George, D.S. & Kovscek, A.R. July 23, 2001.

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Description

Several experimental studies of solution gas drive are available in this report. Almost all of the studies have used light oil. Solution gas drive behavior, especially in heavy oil reservoirs, is poorly understood. Experiments were performed in which pore-scale solution gas drive phenomena were viewed in water/carbon dioxide and viscous oil/carbon dioxide systems. A new pressure vessel was designed and constructed to house silicon-wafer micromodels that previously operated at low (<3 atm) pressure. The new apparatus is used for the visual studies. Several interesting phenomena were viewed. The repeated nucleation of gas bubbles was observed at a gas-wet site occupied by dirt. Interestingly, the dissolution of a gas bubble into the liquid phase was previously recorded at the same nucleation site. Gas bubbles in both systems grew to span one ore more pore bodies before mobilization. Liquid viscosity affected the ease with which gas bubbles coalesced. More viscous solutions result in slower rates of coalescence. The transport of solid particles on gas-liquid interfaces was also observed.

Physical Description

75 pages

Notes

OSTI as DE00783118

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  • Other Information: PBD: 23 Jul 2001

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  • Report No.: DOE/BC/15311-7
  • Grant Number: FC26-00BC15311
  • DOI: 10.2172/783118 | External Link
  • Office of Scientific & Technical Information Report Number: 783118
  • Archival Resource Key: ark:/67531/metadc716059

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  • July 23, 2001

Added to The UNT Digital Library

  • Sept. 29, 2015, 5:31 a.m.

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  • April 8, 2016, 4:38 p.m.

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George, D.S. & Kovscek, A.R. Visualization of Solution Gas Drive in Viscous Oil, SUPRI TR-126, report, July 23, 2001; Tulsa, Oklahoma. (digital.library.unt.edu/ark:/67531/metadc716059/: accessed September 21, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.