Scientific Core Hole Valles Caldera No. 2B (VC-2B), New Mexico: Drilling and Some Initial Results

Jump to: navigation, search


OpenEI Reference LibraryAdd to library

Conference Paper: Scientific Core Hole Valles Caldera No. 2B (VC-2B), New Mexico: Drilling and Some Initial Results

Abstract
Research core hole VC-2b, the third in the U.S. Department of Energy�s Continental Scientific Drilling Program efforts in the Valles caldera, was continuously cored to 1,762 km on the western flank of the caldera�s resurgent dome in 1988. Bottom hole temperature is about 295°C within Precambrian (1.5 Ga) quartz monozonite, deep within the liquid dominated portions of the Sulphur Springs hydrothermal system. VC-2b may be the deepest, hottest, continuously cored hole in North America. Core recovery was 99.2%. The only major drilling problems encountered were when temperatures at the bit exceeded 225°C below depths of about 1000m. The result of these conditions was loss of viscosity and/or lubricity in the mud, apparently caused by breakdown of the high temperature polymers.

Authors 
Jamie N. Gardner, Jeffrey B. Hulen, Peter Lysne, Ron Jacobson, Fraser E. Goff, Dennis L. Nielson, Pisto Larry, C.W. Criswell, R. Gribble, K. Meeker, J.A. Musgrave, T. Smith and D. Wilson






Conference 
GRC Annual Meeting; Santa Rosa, CA; 1989/01/01


Published 
Geothermal Resources Council, 1989





DOI 
Not Provided
Check for DOI availability: http://crossref.org


Online 
Internet link for Scientific Core Hole Valles Caldera No. 2B (VC-2B), New Mexico: Drilling and Some Initial Results

Citation

Jamie N. Gardner,Jeffrey B. Hulen,Peter Lysne,Ron Jacobson,Fraser E. Goff,Dennis L. Nielson,Pisto Larry,C.W. Criswell,R. Gribble,K. Meeker,J.A. Musgrave,T. Smith,D. Wilson. 1989. Scientific Core Hole Valles Caldera No. 2B (VC-2B), New Mexico: Drilling and Some Initial Results. In: Transactions: The Geysers--Three Decades of Achievement: A Window on the Future. GRC Annual Meeting; 1989/01/01; Santa Rosa, CA. Santa Rosa, CA: Geothermal Resources Council; p. 133-139