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Proceedings Papers

Paper presented at the Gulf Rocks 2004, the 6th North America Rock Mechanics Symposium (NARMS), June 5–9, 2004
Paper Number: ARMA-04-502
... transportation viscosity solid particle solid concentration complex reservoir concentration case high concentration slip velocity final geometry operation fracture numerical study reinjection operation geometry equation ABSTRACT: In order to evaluate the growth of fractures for cuttings re...
Proceedings Papers

Paper presented at the Gulf Rocks 2004, the 6th North America Rock Mechanics Symposium (NARMS), June 5–9, 2004
Paper Number: ARMA-04-494
... interaction equation ABSTRACT: This paper presents a fully coupled reservoir-geomechanics model with erosion mechanics to address wellbore instability phenomena associated with sand production within the framework of mixture theory. A Representative Elementary Volume (REV) is chosen to comprise of...
Proceedings Papers

Paper presented at the Gulf Rocks 2004, the 6th North America Rock Mechanics Symposium (NARMS), June 5–9, 2004
Paper Number: ARMA-04-471
... thermo-mechanical coupling during injection operations (time scale of months/years). In fact, the phenomena of the variation of injectivity with injection water temperature and reservoir seismicity can be attributed to thermal stresses. In this paper a three-dimensional integral equation formulation is...
Proceedings Papers

Paper presented at the Gulf Rocks 2004, the 6th North America Rock Mechanics Symposium (NARMS), June 5–9, 2004
Paper Number: ARMA-04-490
... ABSTRACT: A simple approximation of the rheological constitutive equations for isotropic poro-viscoelastic material is proposed. The model is developed by modifying Biot's theory in the transient viscoelsatic regime. This is achieved by considering a liquid-filled spherical shell consisting...
Proceedings Papers

Paper presented at the Gulf Rocks 2004, the 6th North America Rock Mechanics Symposium (NARMS), June 5–9, 2004
Paper Number: ARMA-04-497
... diffusion and heat diffusion to mechanical behavior. Constitutive equations for this theory were first introduced by Palciauskas and Domenico [3] by extending the classic Biot's poroelastic theory [4] for the non-isothermal case. This theory was later established by other investigators, e.g., McTigue [5...
Proceedings Papers

Paper presented at the Gulf Rocks 2004, the 6th North America Rock Mechanics Symposium (NARMS), June 5–9, 2004
Paper Number: ARMA-04-467
... ABSTRACT: In the fully-coupled thermoporoelastic wellbore stress modeling, pore pressure and temperature can be decoupled for a low-permeability shale and the decoupled equations can be solved analytically in the Laplace domain. For a high-permeability rock, such as sandstone or carbonate...
Proceedings Papers

Paper presented at the Gulf Rocks 2004, the 6th North America Rock Mechanics Symposium (NARMS), June 5–9, 2004
Paper Number: ARMA-04-473
... components of these tensors, and the sensitivity of such measurements to changes in the vertical and horizontal stress field is discussed. reservoir geomechanics Upstream Oil & Gas wave velocity elastic wave velocity measurement anisotropic change equation andα 33 model 1 Reservoir...
Proceedings Papers

Paper presented at the Gulf Rocks 2004, the 6th North America Rock Mechanics Symposium (NARMS), June 5–9, 2004
Paper Number: ARMA-04-491
... stress shear displacement shear fracture propagation hydraulic fracture equation ABSTRACT: This paper deals with the shear-induced dilatation mechanism when a plane-strain fluid-driven fracture propagates on a plane of weakness, subjected to shear and compressive stresses. The fracture...
Proceedings Papers

Paper presented at the Gulf Rocks 2004, the 6th North America Rock Mechanics Symposium (NARMS), June 5–9, 2004
Paper Number: ARMA-04-481
... equations in terms of effective stress ratios, resulting in a fracture criterion, which is independent of the borehole fracture angle. The data are leak-off data from oil wells. They are recorded in wells with different inclinations and azimuths, a requirement for a robust inversion. However, there is a...
Proceedings Papers

Paper presented at the Gulf Rocks 2004, the 6th North America Rock Mechanics Symposium (NARMS), June 5–9, 2004
Paper Number: ARMA-04-492
... chemistry drilling fluid formulation concentration shale diffusion equation invasion capillary pressure permeability fluid filtrate ABSTRACT: We have proposed and studied a well-bore Stability model (a modified Failure Criterion), taking into account shale problems, effect of temperature...
Proceedings Papers

Paper presented at the Gulf Rocks 2004, the 6th North America Rock Mechanics Symposium (NARMS), June 5–9, 2004
Paper Number: ARMA-04-539
... proportionality loading perforation tunnel penetration theory jet velocity rock response equation 1. INTRODUCTION In cased completions of oil and gas wells the wellbore is connected to the reservoir via perforation tunnels created by explosive shaped charges. The shaped charges are usually loaded into...
Proceedings Papers

Paper presented at the Gulf Rocks 2004, the 6th North America Rock Mechanics Symposium (NARMS), June 5–9, 2004
Paper Number: ARMA-04-577
... circulation borehole minimum in-situ stress propagation equation wellbore pressure critical pressure ABSTRACT: Existing borehole stability analysis tools are based on an assumed, fixed, circular borehole geometry. In a strict sense, these tools are valid only as long as the borehole remains...
Proceedings Papers

Paper presented at the Gulf Rocks 2004, the 6th North America Rock Mechanics Symposium (NARMS), June 5–9, 2004
Paper Number: ARMA-04-526
... Fluid Dynamics thin plate mass evolution hollow cylinder Reservoir Characterization equilibrium gallery Upstream Oil & Gas transfer process moisture transfer evolution equation flow in porous media thin plate diffusivity experimental data relative humidity saline solution...
Proceedings Papers

Paper presented at the Gulf Rocks 2004, the 6th North America Rock Mechanics Symposium (NARMS), June 5–9, 2004
Paper Number: ARMA-04-579
... equation ABSTRACT: A key to the success of long-term storage of CO 2 in depleted oil or gas reservoirs is the hydraulic integrity of both the geological formations that bound it, and the wellbores that penetrate it. The integrity of this "bounding seal" system is affected by various mechanical...
Proceedings Papers

Paper presented at the Gulf Rocks 2004, the 6th North America Rock Mechanics Symposium (NARMS), June 5–9, 2004
Paper Number: ARMA-04-546
... strain rate compression deformation octahedral profile geomodel prediction equation ABSTRACT: Sandia's GeoModel is a generalized plasticity model that was developed primarily for geological materials, but is also applicable to a much broader class of materials such as concretes, ceramics...
Proceedings Papers

Paper presented at the Gulf Rocks 2004, the 6th North America Rock Mechanics Symposium (NARMS), June 5–9, 2004
Paper Number: ARMA-04-541
... cylinder non-stationary boundary pressure equation coefficient stress path Boundary Pressure blowout ABSTRACT: The fundamental poroelastic solutions provide the framework for modeling of flow-induced stresses and deformations in saturated porous rocks, which is of significant interest in...
Proceedings Papers

Paper presented at the Gulf Rocks 2004, the 6th North America Rock Mechanics Symposium (NARMS), June 5–9, 2004
Paper Number: ARMA-04-520
... discontinuity equation plasticity model localized deformation bifurcation geomaterial ARMA/NARMS 04-520 Bifurcation analysis of a three-invariant, isotropic/kinematic hardening cap plasticity model for geomaterials Richard A. Regueiro Materials and Engineering Sciences Center, Sandia National...
Proceedings Papers

Paper presented at the Gulf Rocks 2004, the 6th North America Rock Mechanics Symposium (NARMS), June 5–9, 2004
Paper Number: ARMA-04-613
... formulation of the governing equations, we need to make a few assumptions with respect to the FEM model [6, 7]: Infinitesimal deformation theory holds. Domains of interest are fully saturated. The fluid and porous medium are everywhere in local thermodynamic equilibrium, i.e., the temperature of the...
Proceedings Papers

Paper presented at the Gulf Rocks 2004, the 6th North America Rock Mechanics Symposium (NARMS), June 5–9, 2004
Paper Number: ARMA-04-560
... rheology fracture equation strain rate fluid rheology ABSTRACT: Viscoelastic surfactant (VES) based fracturing fluids have shown distinct rheological characteristics from conventional polymer based fluids. A nearly constant shear stress plateau is commonly observed in the shear stress versus...
Proceedings Papers

Paper presented at the Gulf Rocks 2004, the 6th North America Rock Mechanics Symposium (NARMS), June 5–9, 2004
Paper Number: ARMA-04-634
... reduction induced by rock compaction for practical production operations. In the following sections, first, we present the details of the numerical model that include coupled field equations, initial and boundary conditions, constitutive relations, and numerical procedures. Second, the model was verified...

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