Pressure transient modeling in geothermal reservoir by using Picard-Mclaurin iteration

Alamta Singarimbun, Yasuhiro Fujimitsu, Mitra Djamal, Rezkia Dewi Andajani

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Exploitation of geothermal resource results the decrease of fluid pressure in geothermal reservoir. In production process, the analysis of reservoir condition is made by observing the pressure state. When the fluid is pumped into the reservoir, the value of pressure varies with time which is called as transient state. The plot of pressure versus time will create a curve with a certain slope. From the graph of the pressure the reservoir condition can be analyzed. The solution of the pressure transient is identified as exponential integral equation Ei(x). When the input to the function is really small for example at x < 0.01, the equation will form an asymptotic curve. Analytical solution involves logarithm natural and Euler constant (γ). In this paper we try to approach the solution of exponential integral equation by numerical integration. The objective of this study is to make a numerical model of the pressure change in a geothermal reservoir and to compare the result between numerical method and analytic. There are two methods used in this study, first is Picard- McLaurin iteration to solve the ordinary differential equations (ODE), and the second is trapezoidal integration to calculate the function of Ei(x). The modeling shows that the result of the calculation with the numerical method matched with the analytic with the range of error between 0.0008 to 4.5 % for drawdown test and 0.19 to 7.7 % for buildup test.

Original languageEnglish
Title of host publicationAdvanced Materials, Structures and Mechanical Engineering
EditorsH.M. Song, H.K. Son, Jong Wan Hu
PublisherTrans Tech Publications Ltd
Pages959-973
Number of pages15
ISBN (Electronic)9783038352549
DOIs
Publication statusPublished - Jan 1 2014
Event2014 International Conference on Advanced Materials, Structures and Mechanical Engineering, ICAMSME 2014 - Incheon, Korea, Republic of
Duration: May 3 2014May 4 2014

Publication series

NameAdvanced Materials Research
Volume1025-1026
ISSN (Print)1022-6680
ISSN (Electronic)1662-8985

Other

Other2014 International Conference on Advanced Materials, Structures and Mechanical Engineering, ICAMSME 2014
CountryKorea, Republic of
CityIncheon
Period5/3/145/4/14

All Science Journal Classification (ASJC) codes

  • Engineering(all)

Fingerprint Dive into the research topics of 'Pressure transient modeling in geothermal reservoir by using Picard-Mclaurin iteration'. Together they form a unique fingerprint.

  • Cite this

    Singarimbun, A., Fujimitsu, Y., Djamal, M., & Andajani, R. D. (2014). Pressure transient modeling in geothermal reservoir by using Picard-Mclaurin iteration. In H. M. Song, H. K. Son, & J. W. Hu (Eds.), Advanced Materials, Structures and Mechanical Engineering (pp. 959-973). (Advanced Materials Research; Vol. 1025-1026). Trans Tech Publications Ltd. https://doi.org/10.4028/www.scientific.net/AMR.1025-1026.959