A semi-analytical model to calculate energy production in single fracture geothermal reservoirs

Xingru Wu, Gary A. Pope, G. Michael Shook, Sanjay Srinivasan

Research output: Contribution to journalConference article

2 Citations (Scopus)

Abstract

The ultimate goal of geothermal reservoir management is to mine as much energy as possible from the reservoir. Since most of geothermal reservoirs are fractured, the development of improved techniques for monitoring, prediction, and control of two-phase mass and energy transport in the fractures are needed. Tracer testing is a powerful tool for characterizing fractures properties such as swept pore volume. By incorporating the pore volume of the fracture estimated from tracer data with a semi-analytical model of mass and energy transport in the fracture and matrix, the energy production rate can be calculated. Previous models to predict energy production assumed single-phase flow and semi-infinite matrix blocks and thus overestimate the energy that can be usefully produced from the reservoir. In this paper, a semi-analytical solution to the mass and energy balance equations is derived for two-phase flow in a fracture with heat conduction from a finite matrix. Calculations using the semi-analytical model are shown to be in good agreement with numerical simulations using the TETRAD simulator.

Original languageEnglish (US)
Pages (from-to)665-669
Number of pages5
JournalTransactions - Geothermal Resources Council
Volume29
StatePublished - Dec 1 2005
EventGeothermal Resources Council 2005 Annual Meeting - Reno, NV, United States
Duration: Sep 25 2005Sep 28 2005

Fingerprint

Petroleum reservoirs
Analytical models
matrix
energy
tracer
single-phase flow
Reservoir management
tracers
two phase flow
Energy balance
Heat conduction
Two phase flow
porosity
energy balance
simulator
mass balance
Simulators
matrices
energy production
conductive heat transfer

All Science Journal Classification (ASJC) codes

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

Cite this

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title = "A semi-analytical model to calculate energy production in single fracture geothermal reservoirs",
abstract = "The ultimate goal of geothermal reservoir management is to mine as much energy as possible from the reservoir. Since most of geothermal reservoirs are fractured, the development of improved techniques for monitoring, prediction, and control of two-phase mass and energy transport in the fractures are needed. Tracer testing is a powerful tool for characterizing fractures properties such as swept pore volume. By incorporating the pore volume of the fracture estimated from tracer data with a semi-analytical model of mass and energy transport in the fracture and matrix, the energy production rate can be calculated. Previous models to predict energy production assumed single-phase flow and semi-infinite matrix blocks and thus overestimate the energy that can be usefully produced from the reservoir. In this paper, a semi-analytical solution to the mass and energy balance equations is derived for two-phase flow in a fracture with heat conduction from a finite matrix. Calculations using the semi-analytical model are shown to be in good agreement with numerical simulations using the TETRAD simulator.",
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A semi-analytical model to calculate energy production in single fracture geothermal reservoirs. / Wu, Xingru; Pope, Gary A.; Shook, G. Michael; Srinivasan, Sanjay.

In: Transactions - Geothermal Resources Council, Vol. 29, 01.12.2005, p. 665-669.

Research output: Contribution to journalConference article

TY - JOUR

T1 - A semi-analytical model to calculate energy production in single fracture geothermal reservoirs

AU - Wu, Xingru

AU - Pope, Gary A.

AU - Shook, G. Michael

AU - Srinivasan, Sanjay

PY - 2005/12/1

Y1 - 2005/12/1

N2 - The ultimate goal of geothermal reservoir management is to mine as much energy as possible from the reservoir. Since most of geothermal reservoirs are fractured, the development of improved techniques for monitoring, prediction, and control of two-phase mass and energy transport in the fractures are needed. Tracer testing is a powerful tool for characterizing fractures properties such as swept pore volume. By incorporating the pore volume of the fracture estimated from tracer data with a semi-analytical model of mass and energy transport in the fracture and matrix, the energy production rate can be calculated. Previous models to predict energy production assumed single-phase flow and semi-infinite matrix blocks and thus overestimate the energy that can be usefully produced from the reservoir. In this paper, a semi-analytical solution to the mass and energy balance equations is derived for two-phase flow in a fracture with heat conduction from a finite matrix. Calculations using the semi-analytical model are shown to be in good agreement with numerical simulations using the TETRAD simulator.

AB - The ultimate goal of geothermal reservoir management is to mine as much energy as possible from the reservoir. Since most of geothermal reservoirs are fractured, the development of improved techniques for monitoring, prediction, and control of two-phase mass and energy transport in the fractures are needed. Tracer testing is a powerful tool for characterizing fractures properties such as swept pore volume. By incorporating the pore volume of the fracture estimated from tracer data with a semi-analytical model of mass and energy transport in the fracture and matrix, the energy production rate can be calculated. Previous models to predict energy production assumed single-phase flow and semi-infinite matrix blocks and thus overestimate the energy that can be usefully produced from the reservoir. In this paper, a semi-analytical solution to the mass and energy balance equations is derived for two-phase flow in a fracture with heat conduction from a finite matrix. Calculations using the semi-analytical model are shown to be in good agreement with numerical simulations using the TETRAD simulator.

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