A study of production/injection data from slim holes and large-diameter wells at the Takigami Geothermal Field, Kyushu, Japan | Zendy

S.K. Garg | Zendy; Jim Combs | Zendy; Fumio Azawa | Zendy; Hiroki Gotoh | Zendy

Open Access

A study of production/injection data from slim holes and large-diameter wells at the Takigami Geothermal Field, Kyushu, Japan

Author(s) -

S.K. Garg,

Jim Combs,

Fumio Azawa,

Hiroki Gotoh

Publication year - 1996

Language(s) - English

Resource type - Reports

DOI - 10.2172/446319

Subject(s) - geothermal gradient , borehole , petroleum engineering , productivity , geology , injection well , volumetric flow rate , production rate , flow (mathematics) , geotechnical engineering , engineering , mechanics , geophysics , industrial engineering , physics , economics , macroeconomics

Production and injection data from nine slim holes and sixteen large-diameter wells at the Takigami Geothermal Field, Kyushu, Japan were analyzed in order to establish relationships (1) between injectivity and productivity indices, (2) between productivity/injectivity index and borehole diameter, and (3) between discharge capacity of slim holes and large-diameter wells. Results are compared with those from the Oguni and Sumikawa fields. A numerical simulator (WELBOR) was used to model the available discharge rate from Takigami boreholes. The results of numerical modeling indicate that the flow rate of large-diameter geothermal production wells with liquid feedzones can be predicted using data from slim holes. These results also indicate the importance of proper well design

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