Using drilling and geological parameters to estimate rock strength in hydrothermally altered rock – A comparison of mechanical specific energy, R/N-W/D chart and Alteration Strength Index
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in: Geothermics, Jahrgang 69.2017, Nr. September, 01.09.2017, S. 119-131.
Publikationen: Beitrag in Fachzeitschrift › Artikel › Forschung › (peer-reviewed)
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TY - JOUR
T1 - Using drilling and geological parameters to estimate rock strength in hydrothermally altered rock – A comparison of mechanical specific energy, R/N-W/D chart and Alteration Strength Index
AU - Wyering, L. D.
AU - Villeneuve, M. C.
AU - Kennedy, B. M.
AU - Gravley, D. M.
AU - Siratovich, P. A.
PY - 2017/9/1
Y1 - 2017/9/1
N2 - Many methods for estimating rock strength for drilling rate optimization were developed for the oil and gas industry, some of which are being used in geothermal fields. We have developed a methodology for using estimated rock strength for drillability assessment in the hydrothermally altered lithologies encountered in the geothermal industry. The Modified Alteration Strength Index (mASI) provides rock strength estimates using simple intact rock properties observable in drill cuttings, such as mineralogy and fractures. We show that rock strengths for hydrothermally altered rock estimated using mASI correlate better to drillability indicators than convetional methods from the oil and gas industry.
AB - Many methods for estimating rock strength for drilling rate optimization were developed for the oil and gas industry, some of which are being used in geothermal fields. We have developed a methodology for using estimated rock strength for drillability assessment in the hydrothermally altered lithologies encountered in the geothermal industry. The Modified Alteration Strength Index (mASI) provides rock strength estimates using simple intact rock properties observable in drill cuttings, such as mineralogy and fractures. We show that rock strengths for hydrothermally altered rock estimated using mASI correlate better to drillability indicators than convetional methods from the oil and gas industry.
KW - Efficiency
KW - Geothermal
KW - Performance
KW - Uniaxial compressive strength
KW - Well
UR - http://www.scopus.com/inward/record.url?scp=85020254861&partnerID=8YFLogxK
U2 - 10.1016/j.geothermics.2017.05.008
DO - 10.1016/j.geothermics.2017.05.008
M3 - Article
AN - SCOPUS:85020254861
VL - 69.2017
SP - 119
EP - 131
JO - Geothermics
JF - Geothermics
SN - 0375-6505
IS - September
ER -
