Productivity and injectivity of horizontal wells. Quarterly report, July 1--September 30, 1996

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This quarterly report reports on the efforts on Task 2, effects of reservoir heterogeneities on performance prediction of horizontal wells. Performance prediction of horizontal and non-conventional wells based on both analytical and numerical tools rarely match actual performance. Even a history matched case with sufficient production data fails to give reliable predictions for long times. In this study the authors explore reasons for the inability of predictive tools to make accurate predictions. They consider a case where a vertical well has been drilled and cored. Then, they generate twenty consistent geostatistical descriptions of permeability and porosity that are all constrained ... continued below

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13 p.

Creation Information

Aziz, K. & Hewett, T.A. December 31, 1996.

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Description

This quarterly report reports on the efforts on Task 2, effects of reservoir heterogeneities on performance prediction of horizontal wells. Performance prediction of horizontal and non-conventional wells based on both analytical and numerical tools rarely match actual performance. Even a history matched case with sufficient production data fails to give reliable predictions for long times. In this study the authors explore reasons for the inability of predictive tools to make accurate predictions. They consider a case where a vertical well has been drilled and cored. Then, they generate twenty consistent geostatistical descriptions of permeability and porosity that are all constrained to hard data obtained from the vertical well. Simulations with these realizations show large differences in production rate, WOR and GOR predictions as a result of variations in reservoir properties. It is also shown that the effect of well index (WI) on simulation results is large. Furthermore, for the example considered, analytical models for critical rate and productivity calculations were found to have limited practical use.

Physical Description

13 p.

Notes

OSTI as DE97003506

Medium: P; Size: 13 p.

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  • Other Information: PBD: [1996]

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  • Other: DE97003506
  • Report No.: DOE/BC/14862--17
  • Grant Number: FG22-93BC14862
  • DOI: 10.2172/446296 | External Link
  • Office of Scientific & Technical Information Report Number: 446296
  • Archival Resource Key: ark:/67531/metadc686690

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Office of Scientific & Technical Information Technical Reports

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Creation Date

  • December 31, 1996

Added to The UNT Digital Library

  • July 25, 2015, 2:21 a.m.

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  • April 7, 2017, 12:48 p.m.

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Aziz, K. & Hewett, T.A. Productivity and injectivity of horizontal wells. Quarterly report, July 1--September 30, 1996, report, December 31, 1996; United States. (https://digital.library.unt.edu/ark:/67531/metadc686690/: accessed March 24, 2019), University of North Texas Libraries, Digital Library, https://digital.library.unt.edu; crediting UNT Libraries Government Documents Department.