Title:

Modeling of Flow and Transport for EGS Optimization Problems

Authors:

Dimitrios KARVOUNIS, Patrick JENNY

Key Words:

discrete fractures network, hierarchical fracture model, geothermal energy, compressible flow in porous media

Conference:

Stanford Geothermal Workshop

Year:

2012

Session:

Modeling

Language:

English

Paper Number:

Karvounis

File Size:

462 KB

View File:

Abstract:

Efficient and accurate direct predicting tools of the hydrological, thermal, mechanical and chemical phenomena that take place during the creation and production phases of Enhanced Geothermal Systems (EGS) are essential for optimization of geothermal energy extraction, to increase the life expectancy and to avoid undesired phenomena such as large seismic events or excessive fluid and pressure losses. Towards that goal, a modeling framework to investigate such geothermal reservoirs has been developed. It is based on a general hierarchical fracture modeling framework that enables the addition of new fractures in a dynamic and computationally inexpensive way. The framework has been coupled with reliable flow and heat transport solvers, where mass and energy are conserved and due to its modular nature, it can be easily coupled with geomechanics and geochemistry modules that enable the simulation of large thermal-hydro-mechanical-chemical systems. Here, the framework has been applied on a variety of thermal-hydro EGS operation scenarios and their performance is presented, analyzed, and compared. More specifically, the impact of the injection temperature on the production history of an EGS power plant is studied and its overall energy production and cost is compared to scenarios, where the working fluid is injected after it has been preheated in a cheap shallow geothermal reservoir. Finally, the framework is used for a simple cost optimization problem.


ec2-35-175-200-199.compute-1.amazonaws.com, you have accessed 0 records today.

Press the Back button in your browser, or search again.

Copyright 2012, Stanford Geothermal Program: Readers who download papers from this site should honor the copyright of the original authors and may not copy or distribute the work further without the permission of the original publisher.


Attend the nwxt Stanford Geothermal Workshop, click here for details.

Accessed by: ec2-35-175-200-199.compute-1.amazonaws.com (35.175.200.199)
Accessed: Friday 29th of March 2024 06:58:04 AM