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Keywords: pore pressure
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Proceedings Papers

Paper presented at the SPE/ISRM Rock Mechanics Conference, October 20–23, 2002
Paper Number: SPE-78188-MS
... and contraction via a fluid seepage force in a time- dependent fashion. However, the poroelastic phenomena may remain in effect during the steady state flow, but in a less direct and nonretroactive manner. Instead of being influenced by the storage variations due to transient pore pressure changes, the fluid flow...
Proceedings Papers

Paper presented at the SPE/ISRM Rock Mechanics Conference, October 20–23, 2002
Paper Number: SPE-78160-MS
... pressure, swelling and acoustic velocities were made. Pore pressures both less than and greater than the applied fluid pressure were observed, and apparent osmotic membrane efficiencies are calculated. Swelling was found to depend not only on the shale type and the fluid, but also on the level of confining...
Proceedings Papers

Paper presented at the SPE/ISRM Rock Mechanics Conference, October 20–23, 2002
Paper Number: SPE-78199-MS
.... Figure 2 : Geological layers and faults in the reservoir zone. Boundary and loading conditions The lower boundary is fixed vertically and free horizontally (Fig. 3). Displacements on the top (surface) boundary are free. This boundary is traction free and the pore pressure is fixed at zero at the top...
Proceedings Papers

Paper presented at the SPE/ISRM Rock Mechanics Conference, October 20–23, 2002
Paper Number: SPE-78150-MS
... and by whom the paper was presented. Write Librarian, SPE, P.O. Box 833836, Richardson, TX 75083-3836, U.S.A., fax 01-972-952-9435. Abstract Borehole instability, sand production, and completion failures during production and pore pressure depletion continue to be significant problems confronting...
Proceedings Papers

Paper presented at the SPE/ISRM Rock Mechanics Conference, October 20–23, 2002
Paper Number: SPE-78164-MS
...-952-9435. Abstract An investigation was performed to determine and compare pore pressure, stresses, and critical mud weights using poroelastic analyses with and without including the undrained loading effect. The undrained loading effect, which enables a fully-coupled poroelasticity analysis...
Proceedings Papers

Paper presented at the SPE/ISRM Rock Mechanics Conference, October 20–23, 2002
Paper Number: SPE-78152-MS
... Abstract A laboratory testing program was performed to investigate the behavior of the sandstone of an HPHT reservoir when subjected to realistic in-situ stresses, pore pressures and stress changes due to production. Volumetric changes, stress path effects, plastic deformation and strength...
Proceedings Papers

Paper presented at the SPE/ISRM Rock Mechanics Conference, October 20–23, 2002
Paper Number: SPE-78204-MS
... of smart completions. The current study addresses the integrity of Valhall horizontal wellbores via a number of two-dimensional finite element simulations intended to model the entire history of the reservoir from discovery, through global pore pressure depletion, to the introduction of a wellbore...
Proceedings Papers

Paper presented at the SPE/ISRM Rock Mechanics Conference, October 20–23, 2002
Paper Number: SPE-78197-MS
... composition orientation overpressure acoustic response upstream oil & gas fissility smectite content log analysis pore pressure reservoir characterization anisotropy sediment acoustic property variation shale dewhurst microstructure muderong shale high smectite content...
Proceedings Papers

Paper presented at the SPE/ISRM Rock Mechanics Conference, October 20–23, 2002
Paper Number: SPE-78159-MS
... displacement mpa mud filtrate pore pressure test solution mechanism borehole surface borehole pressure wellbore design upstream oil & gas wellbore integrity Copyright 2002, Society of Petroleum Engineers Inc. This paper was prepared for presentation at the SPE/ISRM Rock Mechanics Conference...
Proceedings Papers

Paper presented at the SPE/ISRM Rock Mechanics Conference, October 20–23, 2002
Paper Number: SPE-78221-MS
... pm and on the pore pressure po in shales. The experiments were conducted with an instrumented cutting device specially designed to operate inside a triaxial cell. With this set-up, four longitudinal grooves could be cut simultaneously on epoxy- coated shale plugs, under confining pressure and initial...
Proceedings Papers

Paper presented at the SPE/ISRM Rock Mechanics Conference, October 20–23, 2002
Paper Number: SPE-78230-MS
... and by whom the paper was presented. Write Librarian, SPE, P.O. Box 833836, Richardson, TX 75083-3836, U.S.A., fax 01-972-952-9435. Abstract This paper presents an investigation of pore pressure interpretation, fracture gradient analysis, and the impact of uncertainties on drilling costs and capital...
Proceedings Papers

Paper presented at the SPE/ISRM Rock Mechanics Conference, October 20–23, 2002
Paper Number: SPE-78228-MS
... are summarized in SPE 565081 indicating, at least in the short term, no impact of production on wellbore stability. Furthermore, a long term study, which is the focus of this paper, was initiated to constrain the full in situ stress tensor (i.e., orientation and magnitude), reservoir pore pressure, and rock...
Proceedings Papers

Paper presented at the SPE/ISRM Rock Mechanics Conference, October 20–23, 2002
Paper Number: SPE-78240-MS
... Determination. In finite element analysis, the common approach is to subtract the constant far-field stresses and pore pressures from the field quantities. The boundary conditions are thus modified; i.e., on the outer boundary surfaces of the finite domain, all the tractions and pore pressures vanish...
Proceedings Papers

Paper presented at the SPE/ISRM Rock Mechanics Conference, October 20–23, 2002
Paper Number: SPE-78234-MS
... of the particles to the surface by reservoir fluids. A sand formation at depth exists at an equilibrium state of in-situ stress, pore pressure and temperature. Creation of a cavity and depletion of the reservoir cause redistribution of the stresses and pore pressure around the cavity. When the drilling...
Proceedings Papers

Paper presented at the SPE/ISRM Rock Mechanics Conference, October 20–23, 2002
Paper Number: SPE-78219-MS
... of pore pressure, collapse pressure, minimum stress and fracture pressure gradients that were established after the incident. The case illustrates that the conventional methods of determining the pore pressure and fracture gradient may carry considerable uncertainty. Introduction Lost circulation due...
Proceedings Papers

Paper presented at the SPE/ISRM Rock Mechanics Conference, October 20–23, 2002
Paper Number: SPE-78162-MS
... Abstract It is generally accepted that shale deterioration and borehole instability are significantly influenced by excessive pore pressure, ion exchange between drilling fluids and shale, and the anisotropy of the in-situ stress state as well as the formation. This paper describes a model...
Proceedings Papers

Paper presented at the SPE/ISRM Rock Mechanics Conference, October 20–23, 2002
Paper Number: SPE-78174-MS
... in Reservoir Space (DARS) because it attempts to quantitatively "map", through time, the nature of the deformation fields inferred from laboratory experiments into the parametric space that defines the mechanical state of a reservoir (that is, the in-situ principal stresses and pore pressure...
Proceedings Papers

Paper presented at the SPE/ISRM Rock Mechanics Conference, October 20–23, 2002
Paper Number: SPE-78163-MS
... is effectively impermeable for an oil-based mud. This allows the well pressure to be kept higher than the pore pressure so that the mud may effectively support the borehole wall. Water may on the other hand enter the shale, thus the pore pressure in the vicinity of the well will gradually approach the well...

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