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Title: WELCST: engineering cost model of geothermal wells. Description and user's guide

Abstract

WELCST, a FORTRAN code for estimating the effects of R and D project results upon the future cost of geothermal wells is described. The code simulates the drilling and completion of a well at 27 specific US geothermal prospects, given assumptions about well design and casing plan, formation drillability, and selected engineering and cost characteristics of today's drilling technology. The user may change many of the assumptions about engineering and cost characteristics to allow WELCST to simulate impacts of specific R and D projects on the estimated cost of wells at the prospects. An important capability of WELCST is that it simulates rates and costs of major drilling mishaps, based on drilling incident data from the Imperial Valley and Geysers geothermal fields. WELCST is capable of estimating geothermal well costs at liquid-dominated (hydrothermal) sites, vapor-dominated sites, geopressured sites, and Hot Dry Rock sites. The model can contribute to many system-optimization studies, and could be easily adapted to estimate well costs outside of the United States.

Authors:
;
Publication Date:
Research Org.:
Mitre Corp., McLean, VA (USA). METREK Div.
OSTI Identifier:
5139204
Report Number(s):
DOE/ET/28505-T1; M-78-86
DOE Contract Number:  
AC01-77ET28505
Resource Type:
Technical Report
Country of Publication:
United States
Language:
English
Subject:
15 GEOTHERMAL ENERGY; COMPUTER CODES; W CODES; GEOTHERMAL WELLS; COST; WELL DRILLING; WELL COMPLETION; COMPUTERIZED SIMULATION; DRILL BITS; DRILLING FLUIDS; GEOTHERMAL SYSTEMS; GEYSERS GEOTHERMAL FIELD; IMPERIAL VALLEY; MATHEMATICAL MODELS; WELL CASINGS; CALIFORNIA; DRILLING; DRILLING EQUIPMENT; EQUIPMENT; GEOTHERMAL FIELDS; NORTH AMERICA; SIMULATION; USA; WELLS; WESTERN REGION; Geothermal Legacy

Citation Formats

Entingh, D.J., and Lopez, A. WELCST: engineering cost model of geothermal wells. Description and user's guide. United States: N. p., 1979. Web. doi:10.2172/5139204.
Entingh, D.J., & Lopez, A. WELCST: engineering cost model of geothermal wells. Description and user's guide. United States. doi:10.2172/5139204.
Entingh, D.J., and Lopez, A. Thu . "WELCST: engineering cost model of geothermal wells. Description and user's guide". United States. doi:10.2172/5139204. https://www.osti.gov/servlets/purl/5139204.
@article{osti_5139204,
title = {WELCST: engineering cost model of geothermal wells. Description and user's guide},
author = {Entingh, D.J. and Lopez, A.},
abstractNote = {WELCST, a FORTRAN code for estimating the effects of R and D project results upon the future cost of geothermal wells is described. The code simulates the drilling and completion of a well at 27 specific US geothermal prospects, given assumptions about well design and casing plan, formation drillability, and selected engineering and cost characteristics of today's drilling technology. The user may change many of the assumptions about engineering and cost characteristics to allow WELCST to simulate impacts of specific R and D projects on the estimated cost of wells at the prospects. An important capability of WELCST is that it simulates rates and costs of major drilling mishaps, based on drilling incident data from the Imperial Valley and Geysers geothermal fields. WELCST is capable of estimating geothermal well costs at liquid-dominated (hydrothermal) sites, vapor-dominated sites, geopressured sites, and Hot Dry Rock sites. The model can contribute to many system-optimization studies, and could be easily adapted to estimate well costs outside of the United States.},
doi = {10.2172/5139204},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1979},
month = {2}
}