SPE Reservoir Evaluation & Engineering
Volume 14, Number 4, August 2011, pp. 398-412

SPE-146082-PA

Integrated Reservoir Modeling of a Large Sour-Gas Field With High Concentrations of Inerts

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DOI  More information 10.2118/146082-PA http://dx.doi.org/10.2118/146082-PA

Citation

  • Huang, N.S., Aho, G.E., Baker, B.H., Matthews, T.R., and Pottorf, R.J. 2011. Integrated Reservoir Modeling of a Large Sour-Gas Field With High Concentrations of Inerts. SPE Res Eval & Eng  14 (4): 398-412. SPE-146082-PA. doi: 10.2118/146082-PA.

Discipline Categories

  • 6.1.5 Geologic Modeling
  • 6.2.2 Fluid Modeling, Equations of State
  • 6.2.3 Geochemical Characterization
  • 6.5 Reservoir Simulation
  • 6.5.8 History Matching
  • 6.6.9 Special Core Analysis
  • 6.10 Management of Challenging Reservoirs
  • 6.11 Reservoir Engineering of Subsurface Storage

Keywords

  • Integrated Reservoir Modeling, Acid gas reinjection, Large Sour-Gas Field, LaBarge Field, High Concentrations of Inerts

Summary

The LaBarge project demonstrates the successful commercialization of a very large gas resource representative of the increasingly challenging projects faced by our industry. Three particularly distinctive aspects are (1) it is one of the largest acid-gas-reinjection projects in the world, (2) the composition is nearly 80% nonhydrocarbon, and (3) the initial compositional gradient cannot be explained by gravity segregation. This paper describes integrated reservoir-modeling studies conducted to evaluate key reservoir and operational uncertainties. The integrated studies led to a new hypothesis for the initial compositional gradient and illustrated fit-for-purpose modeling approaches for reservoir-fluid charging and mixing, black-oil simulation, and an integrated production network. The studies were used to optimize the drilling and depletion plan to maximize methane production with current facilities and end-of-field-life assumptions, and to analyze acid-gas injection (AGI) into the aquifer.

© 2011. Society of Petroleum Engineers

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History

  • Original manuscript received: 23 April 2010
  • Meeting paper published: 5 December 2007
  • Revised manuscript received: 15 November 2010
  • Manuscript approved: 20 January 2011
  • Version of record: 15 August 2011