... ABSTRACT A novel approach to study hydraulic fracture initiation and propagation inside Nuclear Magnetic Resonance core flooding system (NMR) was examined on 38 mm diameter (1.5") outcrop sandstone rock plugs. A 3.4 mm diameter and about 35 mm long borehole (two-third of the plug's length...

... ABSTRACT Slickwater or linear gel is often used for fracturing development in tight sandstone reservoirs. As it carries sand into the formation through the wellbore, its sand-carrying performance changes with the continuous change of liquid shear rates. In this paper, a new type...

... damage caused by foreign fluid invasion during the development of tight sandstone gas reservoirs, a set of ether nano-displacement agent system was optimized. The mechanism of wetting modification is revealed from the perspective of the physical composition of nano-displacement agent, and the mechanism...

... ABSTRACT In this study, the grain-based model (GBM) is used to evaluate the influence of freeze-thaw cycles (FTCs) action on the mechanical properties of sandstone. Five mineral components of sandstone are built in the numerical model based on GBM. To explore the influence of FTCs, water...

..., marble, sandstone, and gabbro) under both dry and saturated conditions. The results demonstrate that the P-wave velocity of all saturated rocks drops significantly when the temperature is above 0 °C. Particularly, saturated sandstone was observed to have the greatest drop in wave amplitude, probably...

... electrofacies mean hydraulic aperture cluster analysis africa government rock type sandstone reservoir geomechanics open fracture hydraulic aperture well-1 fracture aperture natural open fracture tight gas reservoir stereonet natural fracture ARMA 23 0901 Characterization of a Tight Gas...

... be primarily attributed to the limited numbers of valid rock samples that contain natural and undisturbed rock discontinuities, especially for the case of cohesive rock discontinuities. In this study, we obtained some rock specimens with naturally bonded shale-sandstone interface. We measured the geomechanical...

... is to systematically quantify the effects of these secondary rock properties on a primary geomechanical property in a range of sandstones at the core scale. This study suggests that the pore abundance and the relative amount of framework grains and cements play competing roles in rock's elastic behavior. In addition...

...-breaking performances than that of the conventional planar PDC cutter. upstream oil & gas asia government clastic rock rock type sedimentary rock pdc cutter geological subdiscipline efficiency poisson sandstone cutter rock-breaking mechanism characteristic geology geologist china...

... was measured for sandstone at both hydrostatic and differential stress up to 60MPa in the laboratory. P-wave velocity increases with increasing confining pressure and differential stress, at different rates. The proposed model can fit the P-wave velocity measurement results very well. It provides an approach...

... ABSTRACT In this paper, we present an integrated workflow designed to characterize the natural fracture systems and to optimize fluid sampling in a very complex and heterogeneous fractured tight sandstone reservoir. Conventional techniques are not suited for tight formations, and to overcome...

... microcracks or high porosity. This study aims to examine the subjectivity inherent in strain-based methods and its potential impact on consistent measurement of rock CI. A survey is then conducted using experimental data obtained from sandstone and granite specimens. Results suggest a wider scatter of CI...

... ABSTRACT To reveal the influence of confining pressure on the tensile properties of rock, Brazilian disc tests for tight sandstone and granite under different confining pressures were carried out. The tensile failure characteristics were analyzed, and the tensile strength-confining pressure...

..., the fracturing-flooding experiments and Brazilian split tests were carried out using sandstone outcrops to study the influence of injection rate on the damage characteristics. The results show that: (1) There are two key pressures during the generation of fracturing-flooding fractures: fracturing initiation...

... sandstone true triaxial test stress loading path mean stress loading path different loading path rock strength lode angle loading path zhang invariant rock mech ARMA 23 0608 Study on the generalized Zhang-Zhu strength criterion considering different loading paths of true triaxial tests Zhang, Q...

... of sedimentary rocks from Salt range Punjab, Pakistan. Sandstone samples were collected from different formations of the salt range area. Sample preparation was carried out at the rock mechanics laboratory at UET Lahore as per suggested methods of ISRM. Samples with partings or defects were removed from...

... ABSTRACT Artificial sandstone-like rocks fabricated in the laboratory offer great advantages in controlling their grain size distribution, grain morphology, porosity, and cement content. Synthetic granular rocks offer an efficient way to validate existing analytical models, calibrate numerical...

... subdiscipline strength clastic rock drilling operation rock type reservoir geomechanics weight distribution sandstone geologist geology mineral europe government mudstone pilot bit technology conference distribution model compressive strength exhibition torque drilling parameter proper...

... ABSTRACT MicroCT imaging is performed before and after confined compression testing on a minicore of Boise sandstone in order to extract quantitative information regarding the microstructural controls on compaction initiation and distribution, with the ultimate goal of formulating...

... that support the face of boreholes or perforations may result in both high deviatoric and high mean stresses. Such loadings can lead to grain crushing and/or pore collapse of reservoir rocks. Sandstones often experience grain crushing at high mean stresses. A combination of deviatoric and hydrostatic loading...