... geologist reservoir characterization specimen geology geological subdiscipline society iop publishing iop conf reservoir geomechanics granite isrm 3 fracture toughness anisotropy conference propagation hydraulic fracturing syenogranite orientation environmental science 861...

... to form a complex fracture network. Later, other factors like fracture toughness, in-situ stress, and natural fracture parameters were introduced in combination with brittleness to more comprehensively describe the fracability of the reservoir. However, most of the existing fracability evaluation has been...

..., fracture toughness, in-situ stress as well as natural fracture parameters has been summarized. For the brittleness methods, different definitions of brittleness have been summarized and compared. For the multi-factor fracability evaluation methods, particular emphasis has been paid on illustrating how...

... , hardness H , fracture toughness K IC and other parameters are commonly obtained from laboratory tests with core plugs and logging data interpretations. However, these methods have their own limitations. In recent years, the nanoindentation test has been widely used to predict mechanical properties...

... hydraulic fracturing geology geological subdiscipline fracture toughness geologist wellbore design reservoir geomechanics reservoir characterization plane mode microcrack society iop publishing iop conf propagation university environmental science 861 granite engineering...

...Particulate DEM Simulation of Thermal Effect on Fracture Toughness of Rock J. Shanga*, Z. Zhaoa and Y. Guib a Nanyang Technological University, Singapore b Newcastle University, Newcastle Upon Tyne, United Kingdom * [email protected]; [email protected] Abstract This paper shows a modelling...

... techniques in the research of crack propagation under dynamic loadings. Zhang et al. [12] and Wang et al. [13] conducted the SHPB tests on holed-cracked Brazilian disc specimens and examined the effect of crack length on the dynamic fracture toughness of the specimen, which shows that with the increase...

... measurements can be used to calculate fracture toughness through energy method. Experiment results show the measured average Young s modulus varied from 41.13 to 44.97 GPa, the measured average hardness varied from 2.31 to 2.87 GPa and the average fracture toughness varied from 4.05 to 6.12 MP·m^0.5...

... Abstract Rock engineering deals with a material containing multiple fractures. The critical value of stress intensity factor when a pre-existing flaw begins to develop is defined as fracture toughness. Thus, fracture toughness measurement is essential to support rock engineering design...

... Abstract The semi-circular bending (SCB) test is one of the useful testing methods for determining mode-I fracture toughness of rocks. A SCB specimen with an artificial notch is loaded at three points including lower two points and upper single point in the test. In general, there are two...

... Abstract A fracture toughness test under a wide range of the loading rate from 10 –3 to 10 6 mm/min was conducted using Kimachi sandstone in order to investigate the influence of the loading rate on the fracture toughness of the rock. Semi-Circular Bend (SCB) test was adopted to estimate...

... Abstract Fracture toughness is an indication of the amount of stress required to propagate a preexisting crack and one of the most important properties of any material for many design applications. In this study, fracture toughness test of rocks using straight notched disk bending (SNDB...

...8th Asian Rock Mechanics Symposium ARMS8 14-16 October 2014, Sapporo, Japan ? Development of an ISRM Suggested Method for Determining Mode I Static Fracture Toughness M.D. Kuruppua*, Y. Obarab, M.R. Ayatollahic, K.P. Chongd and T. Funatsue a Curtin University, Kalgoorlie, Australia b Graduate...

... (Origin; North; East; Vertical) axis back-calculation developed by Mizuta (1987). reservoir geomechanics widodo fracture toughness block sample Reservoir Characterization strength Mizuta Triaxial stress Condition Upstream Oil & Gas asian rock mechanics symposium arms8 Kramadibrata...

... the sedimentary rock sample having the bedding planes. There are two main aims in this study. The purposes of this research are: To investigate relationship between fracture toughness and loading axis with respect to bedding planes. To investigate relationship between fracture toughness and other mechanical...

... fracture toughness rift plane shpb system SR sample hydraulic fracturing rapid displacement measurement system loading rate dependency ham-yeol granite non-contact rapid displacement measurement system plane split Hopkinson pressure bar mechanics hardway plane dynamic fracture...

... ABSTRACT In order to investigate the influence of water vapor pressure of surrounding environment on fracture toughness of rock, a series of Semi-Circular Bend (SCB) tests under various water vapor pressures were conducted. The water vapor is the most effective agent which promotes stress...

... Abstract A number of standard methods have been proposed to determine the Mode I fracture toughness of rock. They include those based on short rod specimen, chevron bend specimen and cracked chevon-notched Brazilian disk specimen. The semi-circular bend (SCB) specimen shown in Figure1 has been...

... hydraulic fracturing Engineering Loading Rate MPa fracture characterization strength operation compressive strength dynamic tensile strength tensile strength Upstream Oil & Gas fracture property Stanstead granite apparatus Reservoir Characterization Mohanty fracture toughness...

...ISRM International Symposium 2010 and 6th Asian Rock Mechanics Symposium - Advances in Rock Engineering 23-27 October, 2010, New Delhi, India FRACTURE TOUGHNESS OF ROCK UNDER WATER VAPOR PRESSURE M. KATAOKA, Y. OBARA AND T. YOSHINAGA Kumamoto University, Kumamoto, 860-8555 Japan M. KURUPPU Curtin...