Study on Enhanced Steam Recovery in a Geothermal Production Well with Steam Enhanced Circulation Lifting System

1988 Fiscal Year Final Research Report Summary

• Project/Area Number: 62550459
• Research Category: Grant-in-Aid for General Scientific Research (C)
• Allocation Type: Single-year Grants
• Research Field: 資源開発工学
• Research Institution: Akita University, Mining College
• Principal Investigator: AKIBAYASHI Satoshi Akita University, Mining College, Associate Professor, 鉱山学部, 助教授 (90006669)
• Co-Investigator(Kenkyū-buntansha): SIBUYA Yotsugi Akita University, Mining College, Lecturer, 鉱山学部, 講師 (00154261) ; 石戸 恒雄 通商産業省工業技術院, 地質調査所・地殻熱部, 主任研究官 ; ISHITO Tsuneo Geological Survey of Japan, Geological Reseach Department, Sinior Geologist
• Project Period (FY): 1987 – 1988
• Keywords: hot-water dominated geothermal reservoir / steam enhanced circulation lifting system / 可採エネルギー量 / 過熱蒸気 / 蒸気圧入チュービング

Research Abstract

A steam enhanced circulation lifting system is studied experimentally and theoretically in order to enhance geothermal energy recovery from a hot-water dominated geothermal reservoir. The results are as follows:
(1) Both drawdown of flowing bottom hole pressure and inflow rate of hot-water increase as the inserting depth of steam injecting tubing increases.
(2) Steam must be the vapour of the degree of super-heat that dos not condence under the pressure of the outlet of tubing
(3) The net rate of increase in total production (steam and hot-water) by the steam enhanced circulation lifting system is 20 through 50 % of the amount of production in the case which the injection of steam is not operated. This also is certified theoretically by the analysis of fluid flow in a well.