1887

Abstract

Summary

Condensate bank is formed near the wellbore after bottom-hole pressure is dropped below the dew point pressure. Based on Fevang theory (1995), the main source of productivity loss in gas condensate (GC) wells is region 1 (the closet region to the wellbore), where condensate saturation exceeded critical value. The size of region 1 increases with time. The maximum condensate saturation and development of condensate bank depends on a combination of different parameters.

In this study, a parametric analysis was carried out to investigate the development of region 1 and productivity loss in the GC wells. It was found that production rate impacts the formation time of region 1, while its development with respect to pressure depletion is identical for various production rates. Increasing fluid richness results in faster development of region 1, while the effect of critical condensate saturation is in reverse.

The degree of productivity loss is mainly a function of SCAL data rather than fluid type and production rate. The maximum condensate saturation in the vicinity of wellbore is higher than PVT test condensate dropout, and depends on SCAL data. The degree and time of productivity loss can be estimated by a simple method proposed in this study.

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/content/papers/10.3997/2214-4609.201600661
2016-05-30
2024-03-29
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References

  1. Fevang, Ø and Whitson, C.H.
    [1995] Modelling gas-condensate well deliverability. SPE paper, vol. 30714.
    [Google Scholar]
  2. Mott, R.
    [2003] Engineering calculation of gas condensate well productivity. SPE Reservoir Eval. Eng. J.86298, 298–306.
    [Google Scholar]
  3. Corey, A.T.
    [1954] The interrelation between gas and oil relative permeabilities. Producers Monthly, 19 (November), 38–41.
    [Google Scholar]
  4. Mott, R.E., Cable, A.S. and Spearing, M.C.
    [2000] Measurements of Relative Permeabilities for Calculating Gas-condensate Well Deliverability. SPE Res. Eval. & Eng., 3(6), 473–479. http://dx.doi.org/10.2118/68050-PA.
    [Google Scholar]
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