Numerical simulation of instability of geothermal production well

Ryuichi Itoi; Yasunari Katayama; Toshiaki Tanaka; Naoto Kumagai; Takaichi Iwasaki

Numerical simulation of instability of geothermal production well

Ryuichi Itoi, Yasunari Katayama, Toshiaki Tanaka, Naoto Kumagai, Takaichi Iwasaki

Energy Resources Engineering

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

4 Citations (Scopus)

Abstract

Oscillations in wellhead pressure are sometimes observed in production wells with multiple feedzones. This instability affects stable steam production, and in extreme cases may cause steam production from the well to cease altogether. In this study, we developed a coupled model of transient wellbore and reservoir flows with two well feedzones. Then, numerical simulations were carried out to evaluate the effects of reservoir temperature on the flow characteristics of wells with multiple feedzones. These simulation results show that the cyclic changes in wellhead pressure are caused by temporal changes in the flash point depth within the wellbore.

Original language	English
Title of host publication	Geothermal Resources Council Annual Meeting, GRC 2013
Subtitle of host publication	A Global Resource, from Larderello to Las Vegas
Pages	837-841
Number of pages	5
Edition	PART 2
Publication status	Published - Dec 1 2013
Event	Geothermal Resources Council Annual Meeting: A Global Resource, from Larderello to Las Vegas, GRC 2013 - Las Vegas, NV, United States Duration: Sept 29 2013 → Oct 2 2013

Publication series

Name	Transactions - Geothermal Resources Council
Number	PART 2
Volume	37
ISSN (Print)	0193-5933

Other

Other	Geothermal Resources Council Annual Meeting: A Global Resource, from Larderello to Las Vegas, GRC 2013
Country/Territory	United States
City	Las Vegas, NV
Period	9/29/13 → 10/2/13

All Science Journal Classification (ASJC) codes

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

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

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Numerical simulation of instability of geothermal production well. / Itoi, Ryuichi; Katayama, Yasunari; Tanaka, Toshiaki et al.
Geothermal Resources Council Annual Meeting, GRC 2013: A Global Resource, from Larderello to Las Vegas. PART 2. ed. 2013. p. 837-841 (Transactions - Geothermal Resources Council; Vol. 37, No. PART 2).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

Itoi, R, Katayama, Y, Tanaka, T, Kumagai, N & Iwasaki, T 2013, Numerical simulation of instability of geothermal production well. in Geothermal Resources Council Annual Meeting, GRC 2013: A Global Resource, from Larderello to Las Vegas. PART 2 edn, Transactions - Geothermal Resources Council, no. PART 2, vol. 37, pp. 837-841, Geothermal Resources Council Annual Meeting: A Global Resource, from Larderello to Las Vegas, GRC 2013, Las Vegas, NV, United States, 9/29/13.

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abstract = "Oscillations in wellhead pressure are sometimes observed in production wells with multiple feedzones. This instability affects stable steam production, and in extreme cases may cause steam production from the well to cease altogether. In this study, we developed a coupled model of transient wellbore and reservoir flows with two well feedzones. Then, numerical simulations were carried out to evaluate the effects of reservoir temperature on the flow characteristics of wells with multiple feedzones. These simulation results show that the cyclic changes in wellhead pressure are caused by temporal changes in the flash point depth within the wellbore.",

author = "Ryuichi Itoi and Yasunari Katayama and Toshiaki Tanaka and Naoto Kumagai and Takaichi Iwasaki",

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T1 - Numerical simulation of instability of geothermal production well

AU - Itoi, Ryuichi

AU - Katayama, Yasunari

AU - Tanaka, Toshiaki

AU - Kumagai, Naoto

AU - Iwasaki, Takaichi

PY - 2013/12/1

Y1 - 2013/12/1

N2 - Oscillations in wellhead pressure are sometimes observed in production wells with multiple feedzones. This instability affects stable steam production, and in extreme cases may cause steam production from the well to cease altogether. In this study, we developed a coupled model of transient wellbore and reservoir flows with two well feedzones. Then, numerical simulations were carried out to evaluate the effects of reservoir temperature on the flow characteristics of wells with multiple feedzones. These simulation results show that the cyclic changes in wellhead pressure are caused by temporal changes in the flash point depth within the wellbore.

AB - Oscillations in wellhead pressure are sometimes observed in production wells with multiple feedzones. This instability affects stable steam production, and in extreme cases may cause steam production from the well to cease altogether. In this study, we developed a coupled model of transient wellbore and reservoir flows with two well feedzones. Then, numerical simulations were carried out to evaluate the effects of reservoir temperature on the flow characteristics of wells with multiple feedzones. These simulation results show that the cyclic changes in wellhead pressure are caused by temporal changes in the flash point depth within the wellbore.

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M3 - Conference contribution

AN - SCOPUS:84897608185

SN - 9781629932859

T3 - Transactions - Geothermal Resources Council

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BT - Geothermal Resources Council Annual Meeting, GRC 2013

T2 - Geothermal Resources Council Annual Meeting: A Global Resource, from Larderello to Las Vegas, GRC 2013

Y2 - 29 September 2013 through 2 October 2013

ER -

Numerical simulation of instability of geothermal production well

Abstract

Publication series

Other

All Science Journal Classification (ASJC) codes

UN SDGs

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