TY - GEN

T1 - Application of Kalman filter to pressure interference test analysis

AU - Itoi, Ryuichi

AU - Arakawa, Hiroshi

AU - Fukuda, Michihiro

AU - Jinno, Kenji

PY - 1990

Y1 - 1990

N2 - We present a method to analyze multiwell variable flow rate interference tests by the Kalman filter. A line source solution using the principle of superposition is employed to express the pressure change at a observation well. This solution is utilized as a measurement equation in the Kalman filtering. Since the measurement equation is nonlinear with respect to the parameters of transmissivity and storativity which are to be identified, the extended Kalman filter is adopted. The results of an interference test with four production wells has been analyzed for transmissivity and storativity. In this analysis, these parameters are updated at every moment when the pressure data at the observation well is obtained. The results of analysis indicate that the most likely values of parameters can be estimated as early as at the middle of the test duration.

AB - We present a method to analyze multiwell variable flow rate interference tests by the Kalman filter. A line source solution using the principle of superposition is employed to express the pressure change at a observation well. This solution is utilized as a measurement equation in the Kalman filtering. Since the measurement equation is nonlinear with respect to the parameters of transmissivity and storativity which are to be identified, the extended Kalman filter is adopted. The results of an interference test with four production wells has been analyzed for transmissivity and storativity. In this analysis, these parameters are updated at every moment when the pressure data at the observation well is obtained. The results of analysis indicate that the most likely values of parameters can be estimated as early as at the middle of the test duration.

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M3 - Conference contribution

AN - SCOPUS:0025578444

SN - 0934412685

T3 - Transactions - Geothermal Resources Council

SP - 1207

EP - 1210

BT - Transactions - Geothermal Resources Council

PB - Publ by Geothermal Resources Council

T2 - 1990 International Symposium on Geothermal Energy

Y2 - 20 August 1990 through 24 August 1990

ER -