Multiwell experiment: Overview

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This field laboratory has been established about 7 mi southwest of Rifle, Colorado. Here the Mesaverde formation lies at a depth of 4000 to 8250 ft. This interval contains different, distinct reservoir types depending upon their depositional environments. These different zones serve as the focus of the various testing and stimulation programs. One key to the Multiwell Experiment is three closely spaced wells. Their 110 to 215 ft separation at depth is less than the nominal dimensions of the lenses in the area. Core, log, well testing, and well-to-well seismic data are providing a far better definition of the geological ... continued below

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Pages: 9

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Lorenz, J.C.; Sattler, A.R.; Warpinski, N.R.; Thorne, B.J. & Branagan, P.T. January 1, 1987.

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Description

This field laboratory has been established about 7 mi southwest of Rifle, Colorado. Here the Mesaverde formation lies at a depth of 4000 to 8250 ft. This interval contains different, distinct reservoir types depending upon their depositional environments. These different zones serve as the focus of the various testing and stimulation programs. One key to the Multiwell Experiment is three closely spaced wells. Their 110 to 215 ft separation at depth is less than the nominal dimensions of the lenses in the area. Core, log, well testing, and well-to-well seismic data are providing a far better definition of the geological setting than has been available previously. Comprehensive logging and core analysis programs were conducted. The closely spaced wells also allow interference and tracer tests to obtain in situ reservoir parameters. The vertical variation of in situ stress throughout the intervals of interest is being measured. A series of stimulation experiments is being conducted in one well and the other two wells are being used as observation wells for improved fracture diagnostics and well testing. Another key to achieving the Multiwell Experiment objectives is the synergism resulting from a broad spectrum of activities: geophysical surveys, sedimentological studies, core and log analyses, well testing, in situ stress determination, stimulation, fracture diagnostics, and reservoir analyses. The results from the various activities will define the reservoir and the hydraulic fracture. These, in turn, define the net pay stimulated: the intersection of a hydraulic fracture of known geometry with a reservoir of known morphology and properties. These definitions are further enhanced by the fact that most data will come from closely spaced wells. Thus, spatial variations in reservoir properties can be quantified. 10 refs.

Physical Description

Pages: 9

Notes

NTIS, PC A02/MF A01; 1.

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  • Unconventional gas recovery and utilization, Morgantown, WV, USA, 28 Jul 1987

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  • Other: DE87012396
  • Report No.: SAND-87-1541C
  • Report No.: CONF-870728-2
  • Grant Number: AC04-76DP00789
  • Office of Scientific & Technical Information Report Number: 6441485
  • Archival Resource Key: ark:/67531/metadc1203348

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  • January 1, 1987

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  • July 5, 2018, 11:11 p.m.

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  • Oct. 1, 2018, 7:17 p.m.

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Lorenz, J.C.; Sattler, A.R.; Warpinski, N.R.; Thorne, B.J. & Branagan, P.T. Multiwell experiment: Overview, article, January 1, 1987; United States. (digital.library.unt.edu/ark:/67531/metadc1203348/: accessed November 20, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.