Lost circulation control materials. Progress report

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Description

Work in FY 94 continued to investigate the use of calcium phosphate cements as lost circulation control materials for geothermal wells. The calcium phosphate cements were produced by reacting calcium aluminate cement with sodium phosphate compounds. Pumpable formulations with thickening times up to two hours at temperatures between 25 to 90{degrees}C were developed and characterized. The materials showed rapid set behaviour, early strength development, low permeability and acceptable durability in hydrothermal environments. Strengths up to 4 MPa were achieved four hours after mixing and water permeabilities were of the order of 10{sup -9} to 10{sup -7} cm/s at 24 hours. ... continued below

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27 p.

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Allan, M. L. & Kukacka, L. E. January 1994.

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Description

Work in FY 94 continued to investigate the use of calcium phosphate cements as lost circulation control materials for geothermal wells. The calcium phosphate cements were produced by reacting calcium aluminate cement with sodium phosphate compounds. Pumpable formulations with thickening times up to two hours at temperatures between 25 to 90{degrees}C were developed and characterized. The materials showed rapid set behaviour, early strength development, low permeability and acceptable durability in hydrothermal environments. Strengths up to 4 MPa were achieved four hours after mixing and water permeabilities were of the order of 10{sup -9} to 10{sup -7} cm/s at 24 hours. Partial replacement of calcium aluminate cement with ground granulated blast furnace slag was found to reduce the amount of borax retarder required to maintain pumpability at elevated temperatures and pressures.

Physical Description

27 p.

Notes

OSTI as DE95010441

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  • Other Information: PBD: 1994

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  • Other: DE95010441
  • Report No.: BNL--61384
  • Grant Number: AC02-76CH00016
  • DOI: 10.2172/53661 | External Link
  • Office of Scientific & Technical Information Report Number: 53661
  • Archival Resource Key: ark:/67531/metadc696008

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  • January 1994

Added to The UNT Digital Library

  • Aug. 14, 2015, 8:43 a.m.

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  • Dec. 18, 2015, 3:42 p.m.

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Allan, M. L. & Kukacka, L. E. Lost circulation control materials. Progress report, report, January 1994; Upton, New York. (digital.library.unt.edu/ark:/67531/metadc696008/: accessed August 23, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.