Estimation of fracture surface area based on tracer and temperature histories

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

In EGS reservoirs, a fracture surface area is one of key uncertainty in development. We propose a method to estimate cumulative fracture surface area for each multiple flow path based on tracer and temperature data with cold water injection. Tracer response is used to obtain the flow properties and determine the pore volume for each flow path. By substituting the pore volumes, analytical solutions of heat transfer equation can consist of measurable and/or controllable properties except fracture surface area for each path. The unknown fracture surface areas are estimated by comparison between the superposition of analytical solutions of heat transfer equations and observed temperature decline. Validation with numerical simulation results suggests that even though the number of flow paths is unknown, use of "virtual flow path" can estimate the pore volumes and fracture surface areas. For the simulation results, temperature history for 28 days (10% of temperature decline) provides reasonable estimation of fracture surface area with error of 15.0%.

Original languageEnglish
Title of host publicationGeothermal Energy
Subtitle of host publicationPower To Do More - Geothermal Resources Council 2017 Annual Meeting, GRC 2017
PublisherGeothermal Resources Council
Pages2865-2879
Number of pages15
ISBN (Electronic)0934412227
Publication statusPublished - 2017
EventGeothermal Resources Council 41st Annual Meeting - Geothermal Energy: Power To Do More, GRC 2017 - Salt Lake City, United States
Duration: 2017 Oct 12017 Oct 4

Publication series

NameTransactions - Geothermal Resources Council
Volume41
ISSN (Print)0193-5933

Other

OtherGeothermal Resources Council 41st Annual Meeting - Geothermal Energy: Power To Do More, GRC 2017
CountryUnited States
CitySalt Lake City
Period17/10/117/10/4

Keywords

  • Fracture surface area
  • Optimization
  • Temperature
  • Tracer

ASJC Scopus subject areas

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

Fingerprint Dive into the research topics of 'Estimation of fracture surface area based on tracer and temperature histories'. Together they form a unique fingerprint.

Cite this