ROBUST DECLINE CURVE ANALYSIS

Sutawanir Darwis; Budi Nurani Ruchjana; Asep Kurnia Permadi

doi:10.22342/jims.15.2.50.105-111

Sutawanir Darwis ⁽¹⁾ , Budi Nurani Ruchjana ⁽²⁾ , Asep Kurnia Permadi ⁽³⁾

(1) Statistics Research Division, Faculty of Mathematics and Natural Sciences, Institut Teknologi Bandung, Bandung,, Indonesia,

(2) Department of Mathematics, Faculty of Mathematics and Natural Sci- ences, Universitas Padjadjaran, Bandung,, Indonesia,

(3) Reservoir Engineering Research Division, Faculty of Earth Sciences and Mining, Institut Teknologi Bandung, Bandung, Indonesia

https://doi.org/10.22342/jims.15.2.50.105-111

Issue
Volume 15 Number 2 (October 2009)

Submitted
May 6, 2012

Accepted
May 7, 2012

Published
May 7, 2012

Keywords:

decline curve analysis, robust least squares.

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Abstract

Empirical decline curve analysis of oil production data gives reasonable answer in hyperbolic type curves situations; however the methodology has limitations in fitting real historical production data in present of unusual observations due to the effect of the treatment to the well in order to increase production capacity. The development ofrobust least squares offers new possibilities in better fitting production data using declinecurve analysis by down weighting the unusual observations. This paper proposes a robustleast squares fitting lmRobMM approach to estimate the decline rate of daily production data and compares the results with reservoir simulation results. For case study, we usethe oil production data at TBA Field West Java. The results demonstrated that theapproach is suitable for decline curve fitting and offers a new insight in decline curve analysis in the present of unusual observations.

DOI : http://dx.doi.org/10.22342/jims.15.2.50.105-111

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Authors

Sutawanir Darwis

Statistics Research Division, Faculty of Mathematics and Natural Sciences, Institut Teknologi Bandung, Bandung,

penulis@jims-a.org (Primary Contact)

Budi Nurani Ruchjana

Department of Mathematics, Faculty of Mathematics and Natural Sci- ences, Universitas Padjadjaran, Bandung,

Asep Kurnia Permadi

Reservoir Engineering Research Division, Faculty of Earth Sciences and Mining, Institut Teknologi Bandung, Bandung

Darwis, S., Ruchjana, B. N., & Permadi, A. K. (2012). ROBUST DECLINE CURVE ANALYSIS. Journal of the Indonesian Mathematical Society, 15(2), 105–111. https://doi.org/10.22342/jims.15.2.50.105-111