... lifespan structural geology creep strain evacuation upstream oil & gas rock salt casing integrity mud drop partial evacuation symposium internal pressure creep rate creep deformation deformation sensitivity analysis wellbore lifespan full evacuation wellbore salt rock ARMA 21 1994...

... mechanics geomechanics symposium us rock mechanics geomechanics symposium hydraulic fracturing upstream oil & gas indentation creep rate creep strain plastic deformation creep behavior ABSTRACT: Several studies have demonstrated the application of nanoindentation to study mechanical...

... is also measured during this period, so that Poisson s ratio is able to be calculated from lateral strain change and axial strain change. After this, the sample is kept under 50 MPa confining pressure and 25 MPa deviator stress for one day. The creep strains of both the axial and lateral directions...

... and therefore a creep compliance function is needed to extrapolate laboratory findings and to model long-term behavior. reservoir geomechanics Upstream Oil & Gas Artificial Intelligence Reservoir Characterization complex reservoir Prony series experiment creep data creep test creep strain...

... experiment reservoir geomechanics creep response axial pressure step Faulkner creep strain ductile behavior lateral direction Upstream Oil & Gas differential stress step strain response differential stress Magnitude Shale gas Reservoir Rock deformation damage zone 1. INTRODUCTION...

... and modeling of subsidence has been very strong since the early nineties. Upstream Oil & Gas elasto-visco-plastic constitutive behavior Reservoir Characterization modeling Simulation Fluid Dynamics creep strain specimen creep strain rate geomechanical subsidence modeling reproduce...

... uniaxial creep tests were performed on several selected samples, and then multi-stage triaxial creep tests were carried out at room temperature. Samples used in the tests come from three different gas shale reservoirs. It is found that the creep strain can be described by a power-law function of time...

... as a power-law function of time. Observations suggest that these rocks are much more susceptible to creep deformation in bedding- perpendicular direction than in bedding-parallel directions. The amount of creep strain increases with sample clay content, regardless of the carbonate content, where a pronounced...

.... Second, it is helpful to produce a baseline set of data from our own laboratory, on a well understood material, with which to compare subsequent results on more complex samples. shale gas Upstream Oil & Gas creep strain nitrogen coal bed methane complex reservoir pore pressure...

... & Gas creep strain coefficient Barnett shale 1. INTRODUCTION Recent technological advances in exploiting unconventional tight gas reservoirs have been facilitated by the combination of horizontal drilling and multi-stage reservoir stimulation by slick-water fracturing. A better understanding...

..., time-dependent deformation is most often observed and characterized by conducting creep-strain experiments [e.g. 12]. However, creep-strain data are not routinely collected or reported in the literature, so it would be useful to have a means for obtaining creep function parameters from whatever data...

.... Interestingly, CO2 appears to change the constitutive behavior of coal; Helium saturated samples exhibit elastic behavior, while CO2 saturated samples exhibit viscous, anelastic behavior, as evidenced by creep strain observations. The Power River Basin, which extends from eastern Wyoming into southeastern...

... reservoir geomechanics creep strain Upstream Oil & Gas preconsolidation pressure porosity implication strain rate shale Zoback determination Magnitude Reservoir Characterization constitutive equation compaction experiment application viscoplastic strain Perzyna evolution...

... ABSTRACT: An elasto-plastic-creep material model is developed for modeling the faihu'e of geo-materiais. The plastic and creep strains are accounted for through the strain decomposition technique. The DmckerPrager yield function is used to model the failure of the material. The incremental...

... Characterization Upstream Oil & Gas Lorraine metals & mining creep potential creep strain Artificial Intelligence strength dilatancy angle reservoir geomechanics take account constitutive model distortion coupling iron ore mechanism failure surface plasticity pillar Simulation creep...

... ABSTRACT: The rheological behavior of salt rock is studied by both uniaxial and triaxial relaxation tests. In order to investigate the relaxation behavior of salt rock, stepwise relaxation tests were performed after the sample had been subjected to different pre-relaxation creep strains...

... creep strain is recog- nized. This article explains the results of the experiments conducted to solve these problems. 2. EXPERIMENTATION APPARATUS AND METHOD OF EXPERIMENT Fig. 1 is a block diagram of the experimentation apparatus. The quanti- ties measured in the experiments are of the stresses...

... arises when the joint is perpendicular to the applied stress direction; then only nor- mal joint movements occur. Figure 2 summarizes test data from two sets of tests at different stress levels for this simplest case. The joint creep strains, Ccj , are a fictitious quantity obtained by sub- tracting...

... solid waste management nuclear waste repository Upstream Oil & Gas creep strain Reservoir Characterization exponential-temperature law nuclear waste isolation closure power law exponential-time law time-hardening formulation reservoir geomechanics creep law form numerical...

... Wellbore Design axial stress Reservoir Characterization strength specimen evaluation creep data inelastic law knowledge management isolation rock salt technical memorandum report union carbide corp power law inelastic creep law differential stress level creep strain rate...