Characterization of trapped gas saturation and heterogeneity in core samples using miscible-displacement experiments

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Trapped gas saturation and permeability heterogeneity were evaluated in Berea cores at reservoir conditions, using standard miscible displacement experiments, with and without surfactants. Pressure and production history were influenced by core heterogeneity and foam lamellae formation when aqueous surfactant was present in the core. A simple dispersion model and a three-coefficient dispersion-capacitance model (Coates-Smith) were fit to the experimental data. The dispersion-capacitance model successfully matched the experiments in which foam lamella formed, while the simple dispersion model was used only for determining initial core flow heterogeneity. The objective of the dispersion-capacitance model was to estimate trapped gas saturations; however longitudinal ... continued below

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7 p.

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Smith, D.H. & Jikich, S.A. December 31, 1994.

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This report is part of the collection entitled: Office of Scientific & Technical Information Technical Reports and was provided by UNT Libraries Government Documents Department to Digital Library, a digital repository hosted by the UNT Libraries. It has been viewed 21 times . More information about this report can be viewed below.

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  • Smith, D.H. USDOE Morgantown Energy Technology Center, WV (United States)
  • Jikich, S.A. EG&G Technical Services of West Virginia, Inc. (United States)

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Description

Trapped gas saturation and permeability heterogeneity were evaluated in Berea cores at reservoir conditions, using standard miscible displacement experiments, with and without surfactants. Pressure and production history were influenced by core heterogeneity and foam lamellae formation when aqueous surfactant was present in the core. A simple dispersion model and a three-coefficient dispersion-capacitance model (Coates-Smith) were fit to the experimental data. The dispersion-capacitance model successfully matched the experiments in which foam lamella formed, while the simple dispersion model was used only for determining initial core flow heterogeneity. The objective of the dispersion-capacitance model was to estimate trapped gas saturations; however longitudinal dispersion and mass transfer also were examined. The results show that the dispersion-capacitance model accurately fits trapped gas saturation controlled by rock heterogeneities and foam lamellae for lamella generating mechanisms that allow a continuous gas phase (leave-behind lamellae). The practical applications resulting from this study can aid in core sample selection and scaling short laboratory corefloods to field dimensions for applications to foam stimulation and underground storage of natural gas.

Physical Description

7 p.

Notes

OSTI as DE95008773

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  • Eastern regional conference and exhibition of the Society of Petroleum Engineers: natural gas - a bright future, Charleston, WV (United States), 8-10 Nov 1994

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  • Other: DE95008773
  • Report No.: DOE/METC/C--95/7178
  • Report No.: CONF-941185--1
  • DOI: 10.2172/36798 | External Link
  • Office of Scientific & Technical Information Report Number: 36798
  • Archival Resource Key: ark:/67531/metadc675196

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Office of Scientific & Technical Information Technical Reports

Reports, articles and other documents harvested from the Office of Scientific and Technical Information.

Office of Scientific and Technical Information (OSTI) is the Department of Energy (DOE) office that collects, preserves, and disseminates DOE-sponsored research and development (R&D) results that are the outcomes of R&D projects or other funded activities at DOE labs and facilities nationwide and grantees at universities and other institutions.

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  • December 31, 1994

Added to The UNT Digital Library

  • July 25, 2015, 2:20 a.m.

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  • Nov. 30, 2015, 4:19 p.m.

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Smith, D.H. & Jikich, S.A. Characterization of trapped gas saturation and heterogeneity in core samples using miscible-displacement experiments, report, December 31, 1994; Morgantown, West Virginia. (digital.library.unt.edu/ark:/67531/metadc675196/: accessed December 17, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.