... states government hydraulic fracturing compression principal stress geological subdiscipline diederich excavation bbm model upstream oil & gas wellbore design reservoir geomechanics strength brittle rock initiation tunnel rock mechanic confinement crack growth stiffness envelope...

... in nature. 1. INTRODUCTION Landslide phenomena usually involve the movements of a mixture of rock, earth and/or debris downslope (Cruden, 1991), which tend to develop over time through several different stages, from initiation to propagation and to final deposition (Leroueil, 2001). A landslide may...

... fracturing monitoring engineering propagation boundary stimulation operation initiation production enhancement downhole intervention specimen waveform ultrasonic monitoring rock mechanic geomechanics symposium ARMA 22 0406 Dry and fluid permeated hydraulic fractures and their geophysical...

... is proportional to the area of wave shape and does not depend on the selection of threshold value. When analyzing the physical simulation results of rock acidification fracturing, the large fluctuation of acoustic emission signal intensity indicates fracture initiation or communication fractures: the strong...

... Pressure (LOP). It is sometimes argued that the LOP is a good measure of the in-situ stress, and it is sometimes argued the LOP marks the initiation of a fracture. We analyze this hypothesis and show by basic theoretical considerations and several examples of high quality field data...

... of multi-cluster fractures in the Lucagou shale reservoir and use the acoustic emission (AE) to monitor the dynamic process of hydraulic fracturing. The results show that the fracture interference starts from the initiation stage and is seriously affected by the bedding structure. The fracture interference...

.... The abstract must contain conspicuous acknowledgement of where and by whom the paper was presented. ABSTRACT: In unconventional reservoirs, the initiation and propagation of multiple fractures are strongly in uenced by the type of completion (num- ber and type of initiation points). We conducted two hydraulic...

... hydraulic fracturing prefabricated flaw AE event fluid pressure geothermal reservoir data acquisition system international journal Upstream Oil & Gas acoustic emission initiation Einstein triaxial loading condition experiment Gonçalves da Silva Coalescence propagation...

... sensor while a high resolution camera is used for the implementation of the Digital Image Correlation analysis, in order to monitor the fracturing process. The initiation, interaction and coalescence of the cracks developed during loading is examined. Two wing-cracks are normally nucleated at each flaw...

... method (DIC) was used to study the hydraulic fracture initiation and propagation, by which the variation of the fracture width and the average fracture extension rate of the rock were calculated in different stages. The study showed that variation of displacement on the rock surface was obvious before...

... of a plane strain, KGD-type, hydraulic fracture model. In contrast to classical models of hydraulic fractures, this study tracks the propagation of the fracture from its initiation at the borehole and takes into account the partitioning of the injected fluid between the borehole and the fracture as well...

... wellbore integrity coalbed methane coal seam gas reservoir geomechanics flow in porous media fracturing fluid Wellbore Design natural fracture transverse fracture projection initiation proppant Upstream Oil & Gas Rock mechanics international journal fracturing materials hydraulic...

... ABSTRACT: Drilling-induced tensile fractures (DITFs) are located orthogonally from wellbore breakouts and are observed from image logs obtained during drilling operations. Fully analytical criteria for the orientation of DITFs initiating from vertical and horizontal wellbores in porous...

... element modelling (DEM) approach, compared with the large- scale hydraulic fracturing experiments. As reported earlier in Yildirim et al. (2018) true-triaxial hydraulic fracturing experiments with acoustic measurements were initially carried out on one homogenous shale and one naturally fractured coal...

... ABSTRACT: This work presents results on grain scale cracking behaviors, inhomogeneous deformation and fracture process zone of Australian Harcourt granite under tensile conditions. Brazilian test was performed with cracking initiation and propagation being monitored by a high speed camera (2...

...) and cohesive zone method (CZM). The model can simultaneously capture HF initiation, propagation and re-orientation, fracturing fluid flow and leakoff, formation fluid flow and rock deformation. Interesting results show that (1) pore pressure, stress magnitude and stress orientation are gradually altered...

... lead to fractures initiating just below the casing shoe and propagating upwards creating channels for reservoir fluids to flow to the seafloor. The ability to predict these fracture failures will enhance wellbore integrity understanding during loss of control, predict and therefore prevent broaching...

... and promote more safe operations. In perforated wellbores, perforations connect the wellbore with the targeted formation, thus it is considered the point at which the fracture initiates and propagates. Several parameters such as formation mechanical properties, induced stresses around the wellbore, far field...

... Simulation Upstream Oil & Gas heterogeneity Reservoir Characterization drilling operation pore pressure Directional Drilling hydraulic fracture propagation horizontal stress fracture propagation finite element method initiation Poisson horizontal well propagation minimum horizontal stress...

... the cement volume shrinkage during the cement hardening and MA (debonding fractures) tend to occur under the periodically cooling during the injection stage. The results also show that the initial stress state in the cement for each procedure is a key factor determining the initiation of different cement...