Investigating the effects of mechanical properties of rocks on specific energy and penetration rate of borehole drilling

P Kolapo - Geotechnical and Geological Engineering, 2021 - Springer
… the analysis of effects of mechanical properties of rock on … The study made use of an integrated
approach involving the … amount of energy required to remove a unit volume of rock. The …

A new method for prediction of rock quality designation in borehole using energy of rotary drilling

MM He, N Li, XC Yao, YS Chen - Rock Mechanics and Rock Engineering, 2020 - Springer
… , but no karstic features are observed in the limestone. For the geotechnical evaluation and
rock mass classification, field observations, geophysical exploration, borehole logging, field …

Measuring and modelling of dry bulk rock density for mineral resource estimation

MZ Abzalov - Applied Earth Science, 2013 - journals.sagepub.com
rock volume, including porosity. In practice, it is determined by dividing the dry mass of a
geological sample by its volumeanalysis shows that estimation errors of rock densities are …

Strain energy density distribution of a tight gas sandstone reservoir in a low-amplitude tectonic zone and its effect on gas well productivity: A 3D FEM study

S Yin, J Zhao, Z Wu, W Ding - Journal of Petroleum Science and …, 2018 - Elsevier
… of the integrated rupture rate (I F ) and strain energy density (U… high strain energy density
value is relatively high, and the rock … The structural curvature analysis methods show defects in …

Evaluation method for rock mass structure integrity based on borehole multivariate data

J Wang, H Xu, W Chen, C Wang… - International Journal of …, 2022 - ascelibrary.org
volume joint number (J V ) and average joint spacing (d p ). (3) The acoustic wave test … If
the rocks in the borehole camera area are integrated, the incident light has a good reflection in …

Three-dimensional hydro-mechanical model of borehole in fractured rock mass using discrete element method

E Karatela, A Taheri - Journal of Natural Gas Science and Engineering, 2018 - Elsevier
… In this study, a three-dimensional model using 3DEC is developed to simulate a borehole
drilled in fractured rock mass. A model with overbalanced drilling conditions is simulated in this …

Estimating in situ rock mass strength and elastic modulus of granite from the Soultz-sous-Forêts geothermal reservoir (France)

MC Villeneuve, MJ Heap, ARL Kushnir, T Qin… - … Energy, 2018 - Springer
rock coupled with Geological Strength Index assessments—… core and borehole analyses—to
provide rock mass strength … the rock mass varies in accordance with the fracture density

Assessment of crack initiation and propagation in rock from explosion-induced stress waves and gas expansion by cross-hole seismometry and FEM–DEM method

LF Trivino, B Mohanty - International Journal of Rock Mechanics and …, 2015 - Elsevier
… detonated in ϕ45 mm boreholes are discussed in this paper. … the crack density distribution
within this volume is required. … to the crack density integrated over the (cylindrical) volume

Numerical modeling of a soil-borehole thermal energy storage system

N Catolico, S Ge, JS McCartney - Vadose Zone Journal, 2016 - pubs.geoscienceworld.org
… calibrated model served as the basis for a sensitivity analysis … at the outer boreholes (C), Q
j is the volumetric flow rate (m3 s… soil and rock hydrological and thermal properties. Sensitivity …

Neural network application to petrophysical and lithofacies analysis based on multi-scale data: An integrated study using conventional well log, core and borehole …

AA Shehata, OA Osman, BS Nabawy - Journal of natural gas science and …, 2021 - Elsevier
… and borehole image. Core permeability was estimated by using different variables including
effective porosity, bulk density, volume of shale and volumeRock typing was constructed in …