### Abstract

A method to analyze multi-well variable-flowrate interference test data using the line source solution based on an infinite reservoir is described. This presented method employs the Kalman filter technique which provides the best estimates of the reservoir parameters, transmissivity(T) and storativity(S), at every moment when the new pressure value becomes available. Measured pressure data of two observation wells from the interference test conducted for nine months at the Takigami geothermal field, Japan, have been analyzed. The results indicate that the poor initial guesses of parameters will not lead to the divergence of calculations if the ratio of the guesses(S/T) is given to be one or less. The parameter estimation behavior seems to reflect the effects of the faulty pressure data caused by malfunctioning of measurement apparatus and by the fluid flow which dose not satisfy the infinite reservoir model.

Original language | English |
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Pages (from-to) | 657-662 |

Number of pages | 6 |

Journal | Transactions - Geothermal Resources Council |

Volume | 16 |

Publication status | Published - Dec 1 1992 |

Event | 1992 Annual Meeting of the Geothermal Resources Council - San Diego, CA, USA Duration: Oct 4 1992 → Oct 7 1992 |

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### All Science Journal Classification (ASJC) codes

- Renewable Energy, Sustainability and the Environment
- Energy Engineering and Power Technology
- Geophysics

### Cite this

*Transactions - Geothermal Resources Council*,

*16*, 657-662.

**Interference test analysis method using the Kalman filtering and its application to the takigami geothermal field, Japan.** / Itoi, Ryuichi; Fukuda, Michihiro; Jinno, Kenji; Gotoh, Hiroki.

Research output: Contribution to journal › Conference article

*Transactions - Geothermal Resources Council*, vol. 16, pp. 657-662.

}

TY - JOUR

T1 - Interference test analysis method using the Kalman filtering and its application to the takigami geothermal field, Japan

AU - Itoi, Ryuichi

AU - Fukuda, Michihiro

AU - Jinno, Kenji

AU - Gotoh, Hiroki

PY - 1992/12/1

Y1 - 1992/12/1

N2 - A method to analyze multi-well variable-flowrate interference test data using the line source solution based on an infinite reservoir is described. This presented method employs the Kalman filter technique which provides the best estimates of the reservoir parameters, transmissivity(T) and storativity(S), at every moment when the new pressure value becomes available. Measured pressure data of two observation wells from the interference test conducted for nine months at the Takigami geothermal field, Japan, have been analyzed. The results indicate that the poor initial guesses of parameters will not lead to the divergence of calculations if the ratio of the guesses(S/T) is given to be one or less. The parameter estimation behavior seems to reflect the effects of the faulty pressure data caused by malfunctioning of measurement apparatus and by the fluid flow which dose not satisfy the infinite reservoir model.

AB - A method to analyze multi-well variable-flowrate interference test data using the line source solution based on an infinite reservoir is described. This presented method employs the Kalman filter technique which provides the best estimates of the reservoir parameters, transmissivity(T) and storativity(S), at every moment when the new pressure value becomes available. Measured pressure data of two observation wells from the interference test conducted for nine months at the Takigami geothermal field, Japan, have been analyzed. The results indicate that the poor initial guesses of parameters will not lead to the divergence of calculations if the ratio of the guesses(S/T) is given to be one or less. The parameter estimation behavior seems to reflect the effects of the faulty pressure data caused by malfunctioning of measurement apparatus and by the fluid flow which dose not satisfy the infinite reservoir model.

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UR - http://www.scopus.com/inward/citedby.url?scp=0026962957&partnerID=8YFLogxK

M3 - Conference article

AN - SCOPUS:0026962957

VL - 16

SP - 657

EP - 662

JO - Transactions - Geothermal Resources Council

JF - Transactions - Geothermal Resources Council

SN - 0193-5933

ER -