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Title: Conducting a 3D Converted Shear Wave Project to Reduce Exploration Risk at Wister, CA

Ormat sited 2 full-size exploration wells based on 3D seismic interpretation of fractures, prior drilling results, and temperature anomaly. The wells indicated commercial temperatures (>300 F), but almost no permeability, despite one of the wells being drilled within 820 ft of an older exploration well with reported indications of permeability. Following completion of the second well in 2012, Ormat undertook a lengthy program to 1) evaluate the lack of observed permeability, 2) estimate the likelihood of finding permeability with additional drilling, and 3) estimate resource size based on an anticipated extent of permeability.
Authors:
 [1] ;  [1] ;  [1] ;  [1]
  1. Ormat Nevada, Inc., Reno, NV (United States)
Publication Date:
OSTI Identifier:
1252205
Report Number(s):
DE--EE0002838
DOE Contract Number:
EE0002838
Resource Type:
Technical Report
Research Org:
Ormat Nevada, Inc., Reno, NV (United States)
Sponsoring Org:
USDOE Office of Energy Efficiency and Renewable Energy (EERE), Geothermal Technologies Office (EE-4G)
Country of Publication:
United States
Language:
English
Subject:
15 GEOTHERMAL ENERGY