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Keywords: strength
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Proceedings Papers

Paper presented at the SPE/ISRM Rock Mechanics in Petroleum Engineering, July 8–10, 1998
Paper Number: SPE-47372-MS
... Abstract Temperature and pressure sensitive processes modify rock strength and fault properties with depth. A series of triaxial shear fracture experiments have been conducted on granite under fixed confining pressures (70 to 480MPa), pore fluid pressures (10 to 300MPa) and temperatures (room...
Proceedings Papers

Paper presented at the SPE/ISRM Rock Mechanics in Petroleum Engineering, July 8–10, 1998
Paper Number: SPE-47581-MS
... region as expected. But this apparent strengthening was not strengthening in a general sense. The material cohesion was greatly reduced (like the tensile strength). Under extensional conditions there was little or no effect of previous straining of the samples. It is therefore proposed to replace...
Proceedings Papers

Paper presented at the SPE/ISRM Rock Mechanics in Petroleum Engineering, July 8–10, 1998
Paper Number: SPE-47382-MS
... time, and the nature of the carrier fluid. Mechanisms of Flowback. Empirical correlations between UNaxiat Compressive Strength (UCS) and flowback have been found from laboratory work. In general, RCP with low strength can prevent proppant production. For example, Shell found that a UCS of 0.19 MPa...
Proceedings Papers

Paper presented at the SPE/ISRM Rock Mechanics in Petroleum Engineering, July 8–10, 1998
Paper Number: SPE-47377-MS
... samples it is normal to determine the mineralogy and structure, the prosity and permeability, and a few geomechanical properties (Young s modulus, Poisson s ratio, etc For many practical purposes however an evaluation of the stress - strain and strength behavior is required and also of the loading related...
Proceedings Papers

Paper presented at the SPE/ISRM Rock Mechanics in Petroleum Engineering, July 8–10, 1998
Paper Number: SPE-47360-MS
... prediction compressive strength upstream oil & gas wellbore everest complex log analysis strength elastoplastic interface mpa reservoir characterization reservoir geomechanics well 22 well logging core sample thompson elastic-perfectly plastic model stress state critical drawdown...
Proceedings Papers

Paper presented at the SPE/ISRM Rock Mechanics in Petroleum Engineering, July 8–10, 1998
Paper Number: SPE-47362-MS
... the model in a way which allows direct estimation of the model parameters from the laboratory data, eliminating much of the subjectivity in the parameter estimation. This procedure allow us to give a more precise evaluation of the strengths and short comings of the model. Examples of how well North Sea weak...
Proceedings Papers

Paper presented at the SPE/ISRM Rock Mechanics in Petroleum Engineering, July 8–10, 1998
Paper Number: SPE-47365-MS
...SPE/ISRM 47365 Mechanical Strength of Reservoir Materials: Key Information for Sand Prediction Jiaxiang Zhang, Chandra S. Rai, Carl H. Sondergeld, Amoco EPTG, Tulsa Copyright 1998, Society of Petroleum Engineers, Inc. sand influx. Several factors lead to sand production. The most This paper...
Proceedings Papers

Paper presented at the SPE/ISRM Rock Mechanics in Petroleum Engineering, July 8–10, 1998
Paper Number: SPE-47210-MS
... in laboratory or back-calculated based on earthquake mechanism. P. 59 upstream oil & gas horizontal stress minimum horizontal stress magnitude friction angle fault angle fault residual friction angle stress data poisson assumption strength stress estimation addis residual friction angle...
Proceedings Papers

Paper presented at the SPE/ISRM Rock Mechanics in Petroleum Engineering, July 8–10, 1998
Paper Number: SPE-47240-MS
... cohesion mpa papanastasiou constraint mud pressure friction wellbore instability stress field computation stress magnitude breakout strength reservoir characterization upstream oil & gas spe 47240 reservoir geomechanics situ stress cusiana field modeling magnitude...
Proceedings Papers

Paper presented at the SPE/ISRM Rock Mechanics in Petroleum Engineering, July 8–10, 1998
Paper Number: SPE-47244-MS
... for borehole stability during drilling, after reservoir pore pressure drawdown. P. 199 breakout stress state magnitude contour high horizontal stress stress field wellbore design sand production mpa orientation wellbore integrity rock strength reservoir characterization tensile fracture...
Proceedings Papers

Paper presented at the SPE/ISRM Rock Mechanics in Petroleum Engineering, July 8–10, 1998
Paper Number: SPE-47251-MS
... Abstract The two most commonly used rock failure criteria in wellbore stability analyses are the Mohr-Coulomb criterion and the Drucker-Prager criterion. Neither of these is compatible with 3-dimensional rock strength measurements that have explored the influence of the intermediate principal...
Proceedings Papers

Paper presented at the SPE/ISRM Rock Mechanics in Petroleum Engineering, July 8–10, 1998
Paper Number: SPE-47196-MS
...SPE/ISRM 47196 The scratch test as a means to measure strength of sedimentary rocks T. Richard, E. Detournay, A. Drescher, P. Nicodème, D. Fourmaintraux Copyright 1998, Society of Petroleum Engineers, Inc. models is to establish the dependence of the cutting force on the mechanical parameters...
Proceedings Papers

Paper presented at the SPE/ISRM Rock Mechanics in Petroleum Engineering, July 8–10, 1998
Paper Number: SPE-47252-MS
... Abstract Wellbore stability has been traditionally analyzed by comparing the stresses to the formation strength. In addition, most of the problems have occurred in the shales; hence, have been attributed to the chemical interaction between the drilling fluid and the rock. However, field...
Proceedings Papers

Paper presented at the SPE/ISRM Rock Mechanics in Petroleum Engineering, July 8–10, 1998
Paper Number: SPE-47320-MS
... method seismic event kinetic energy stiffness porosity mechanism compaction chalk model upstream oil & gas particle granite reservoir characterization waveform strength spe 47320 information magnitude consulting group bond breakage granite sample petroleum engineer...
Proceedings Papers

Paper presented at the SPE/ISRM Rock Mechanics in Petroleum Engineering, July 8–10, 1998
Paper Number: SPE-47333-MS
... geomechanics effective plastic strain reservoir characterization input data mpa depletion magnitude perforation strength ..d. SPE/lSRM 47333 Advanced Sand Prediction in a User Friendly Wrapping H. Kjorholt, SPE, and H. Joranson, SPE, and P. Markestad, WE, and A.M. Raaen, SPE, and R. Viken, SPE...
Proceedings Papers

Paper presented at the SPE/ISRM Rock Mechanics in Petroleum Engineering, July 8–10, 1998
Paper Number: SPE-47286-MS
... wellbore design drilling fluid formulation strength drilling fluid property drilling fluids and materials azimuth upstream oil & gas in-situ stress wellbore integrity rock mechanics Abstract Early efforts to drill wells in a gas field north of Bali Island, a tectonicregion in Indonesia...
Proceedings Papers

Paper presented at the SPE/ISRM Rock Mechanics in Petroleum Engineering, July 8–10, 1998
Paper Number: SPE-47328-MS
... Abstract Sanding experiments were carried out on weak sandstones with uniaxial compressive strengths in the range of 2 MPa to 25 MPa. The sandstones were either reservoir rocks or those with appropriate physical and mechanical properties to be good model materials. The experiments involved...
Proceedings Papers

Paper presented at the SPE/ISRM Rock Mechanics in Petroleum Engineering, July 8–10, 1998
Paper Number: SPE-47282-MS
... is therefore more stable than circular geometry. Recent experimental studies on utilizing breakout geometry to enhance tunnel stability have also shown that breakout geometry has a much greater "excavation strength" than circular geometry under the same stress configurations. Breakout geometry provides a "self...
Proceedings Papers

Paper presented at the SPE/ISRM Rock Mechanics in Petroleum Engineering, July 8–10, 1998
Paper Number: SPE-47358-MS
... properties currently determined include Poisson s ratio, horizontal stress magnitude, borehole breakdown pressure gradient, pore pressure gradient and unconfined compressive strength. This paper summarizes the shear wave velocity estimation technique and presents several examples. Field examples will also...

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