Modeling and interpretation of two-phase flow and tracer studies from a subbituminous coal seam in the San Juan basin of New Mexico

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Field and modeling studies were performed to characterize two-phase flow within the natural cleat structure of an upper Cretaceous subbituminous coal seam. A two borehole pattern with open completion was used in a study of dewatering and tracer residence time distribution. Air was pumped into a five meter thick seam located about 170 meters below the surface. Krypton 85 was used as the airborne tracer. Air inflow and air and water production rates and tracer arrival times were monitored. The field tests were simulated with a two-phase, three component, porous flow code. Results showed that the air inflow and air ... continued below

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10 pages

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Nuttall, H.E. & Travis, B.J. January 1, 1980.

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Description

Field and modeling studies were performed to characterize two-phase flow within the natural cleat structure of an upper Cretaceous subbituminous coal seam. A two borehole pattern with open completion was used in a study of dewatering and tracer residence time distribution. Air was pumped into a five meter thick seam located about 170 meters below the surface. Krypton 85 was used as the airborne tracer. Air inflow and air and water production rates and tracer arrival times were monitored. The field tests were simulated with a two-phase, three component, porous flow code. Results showed that the air inflow and air and water outflow rates and breakthrough times could not be modeled assuming a uniform darcy-type permeability. The use of a pressure dependent permeability did provide, however, a much better match with the field data.

Physical Description

10 pages

Notes

NTIS, PC A02/MF A01.

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  • 6. underground coal conversion symposium, Afton, OK, USA, 13 Jul 1980

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  • Report No.: LA-UR-80-1680
  • Report No.: CONF-800716-9
  • Grant Number: W-7405-ENG-36
  • Office of Scientific & Technical Information Report Number: 5420860
  • Archival Resource Key: ark:/67531/metadc1065201

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Office of Scientific & Technical Information Technical Reports

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  • January 1, 1980

Added to The UNT Digital Library

  • Feb. 4, 2018, 10:51 a.m.

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  • June 11, 2019, 2:41 p.m.

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Nuttall, H.E. & Travis, B.J. Modeling and interpretation of two-phase flow and tracer studies from a subbituminous coal seam in the San Juan basin of New Mexico, article, January 1, 1980; United States. (https://digital.library.unt.edu/ark:/67531/metadc1065201/: accessed June 19, 2019), University of North Texas Libraries, Digital Library, https://digital.library.unt.edu; crediting UNT Libraries Government Documents Department.