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Title: Modeling of heat extraction from variably fractured porous media in Enhanced Geothermal Systems

Modeling of heat extraction in Enhanced Geothermal Systems is presented. The study builds on recent studies on the use of directional wells to improve heat transfer between doublet injection and production wells. The current study focuses on the influence of fracture orientation on production temperature in deep low permeability geothermal systems, and the effects of directional drilling and separation distance between boreholes on heat extraction. The modeling results indicate that fracture orientation with respect to the well-pair plane has significant influence on reservoir thermal drawdown. As a result, the vertical well doublet is impacted significantly more than the horizontal well doublet
Authors:
 [1] ;  [1] ;  [1]
  1. Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
Publication Date:
OSTI Identifier:
1237698
Report Number(s):
SAND--2015-7093J
Journal ID: ISSN 0375-6505; 603167
Grant/Contract Number:
AC04-94AL85000
Type:
Accepted Manuscript
Journal Name:
Geothermics
Additional Journal Information:
Journal Volume: 61; Journal Issue: C; Journal ID: ISSN 0375-6505
Publisher:
Elsevier
Research Org:
Sandia National Laboratories (SNL-NM), Albuquerque, NM (United States)
Sponsoring Org:
USDOE National Nuclear Security Administration (NNSA)
Country of Publication:
United States
Language:
English
Subject:
15 GEOTHERMAL ENERGY reservoir modeling; Enhanced Geothermal Systems; heat extraction; fractured orientation; well orientation; stochastic methods