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Estimation of Oil and Gas Reserves in Place using Production Decline Trend Analysis

Journal Name:

  • International Journal of Science and Engineering Investigations

Publication Year:

  • 2013

Key Words:

Author NameUniversity of Author
Abstract (2. Language): 
Mathematical models equations were successfully derived for studying reservoirs fluids depletion from the peak value to an economic value called abandonment. Estimation of Oil and/or Gas Cumulative Production and Initially in Place was done Using Production Decline Rate Trend Analysis. Fields past production data (called regional data) were used to generate standard curves. These curves were empirically used in generating the evaluation model equations. The evaluation model equations were used to project future hydrocarbons production rates in a given time. The projected rates values (called generic or projected data) were also plotted against time, which generated curves that were equally used to obtain the prediction model equations for the estimation of the cumulative hydrocarbons production and the hydrocarbons initially in place. The estimated cumulative hydrocarbons productions were comparable with the respective tank values. The percentage accuracy for gas fields ranged from 99.86% and above, while the percentage accuracy for oil ranged from 98.64% to 99.98%. The models developed for decline rates trends using field data were the basic tools which showed high percentage of accuracy. The advantage of using projectiles and parabolic methods in model development is that such models would be very flexible. The models could be applied with high accuracy right from the initial reservoir stage, through the transient stage and transition stage to the decline rate stage.
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  • 18
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  • English

REFERENCES

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International Journal of Science and Engineering Investigations, Volume 2, Issue 18, July 2013 12
www.IJSEI.com Paper ID: 21813-01
ISSN: 2251-8843
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