... attributes is presented, based on rock physics responses to various overpressuring mechanisms. A series of laboratory acoustic tests were performed on reservoir sandstones and shales, simulating normal compaction, disequilibrium compaction, fluid expansion and tectonic mechanisms of overpressuring...

... and the results will be discussed in the later sections. After studying the nature of shale and its properties, Apande (1980)1 presented his model. Theoretically, he had worked on a model proposed by Hayatdavoudi which would connect some of the shale properties such as capillary and swelling pressures to well...

... reservoir geomechanics structural geology fracture characterization pore pressure dynamic equilibrium critical pore pressure mechanism hydrocarbon column height phase pressure reservoir sand shale dynamic capacity Reservoir Characterization Upstream Oil & Gas pp ss migration...

... Upstream Oil & Gas pore pressure prediction reservoir geomechanics seismic data mud weight safe mud weight minimum safe mud weight pressure prediction orientation mud window velocity uncertainty shale seismic velocity column height Reservoir Characterization strength...

... deeper MDTs were provided for calibration. While the models and tools are quite simple, the shale pressures are derived from several measurements and decisions. The results from each analyst's interpretation were compiled and combined with some theoretical analysis to estimate the uncertainty attached...

... Reservoir Characterization experimental observation shale SINTEF Petroleum Research stiffness s-wave velocity frequency free water Velocity Dispersion rock physics model physics model Upstream Oil & Gas transition porosity shear moduli clay mineral experiment dispersion...

... wellbore integrity Reservoir Characterization strength acoustic measurement Upstream Oil & Gas diameter small shale sample mechanical data empirical correlation mud weight window diffusion constant anisotropy shale plane sequence interaction Wellbore Design input parameter...

... that terminate against the salt dome flank in the piercement region, in gentle flank anticlines, or under salt tongues (Figs 1 & 2). Accessing these resources presents problems including massive lost circulation, fractured shale sloughing, serious gas cutting of mud, and so on. These problems are related...

... reasonable penetration rates. However, high MW carries risks of lost circulation in non-salt zones, and this risk must be properly managed through knowledge of stresses. Salt does not present as serious drilling problems as fractured shale, but there are challenges such as washouts, rapid borehole closure...

...- sure pulses. Tests were carried out in shale and sandstone with a drag bit and in granite with an indentation bit. Suction pressure pulses with amplitude comparable to the rock tensile strength, cause a large increase in drilling rates in shale; and significant increases in drilling rates in sandstone...

...Pacific Rocks 2000, Girard, Liebman, Breeds & Doe (eds) © 2000 Balkema, Rotterdam, ISBN 90 5809 1554 Effect of initial pore pressure distribution on deformations around wellbores in shales X.Chen & C. P.Tan CSIRO Petroleum, Glen Waverle)! Vic., Australia C. M. Haberfield Department o/Civil...

...Pacific Rocks 2000, Girard, Liebman, Breeds & Doe (eds) © 2000 Balkema, Rotterdam, ISBN 905809 1554 A novel experimental technique for investigating pore pressure effect on mechanical and acoustic properties in sands and shales A.I.Mese Halliburton Energy Services, Houston, Tex., USA A.N.Tutuncu...

... wellbore integrity drilling fluid formulation drilling fluid chemistry drilling fluid property Upstream Oil & Gas drilling fluid selection and formulation Wellbore Design shale pore pressure shale-fluid interaction Reservoir Characterization drilling fluids and materials wellbore...

... drilling fluid selection and formulation Wellbore Design Reservoir Characterization drilling fluids and materials pore pressure chemical osmosis osmosis contribution wellbore integrity drilling fluid formulation thermal osmosis shale drilling fluid chemistry membrane chemical...

... Reservoir Characterization drilling fluids and materials drilling fluid management & disposal swell test clay platelet specimen Upstream Oil & Gas pore shale wellbore integrity consolidation interlamellar pore Pore Fluid clay shale osmotic pressure geotechnical journal...

...Pacific Rocks 2000, Girard, Liebman, Breeds & Doe (eds) O 2000 Balkema, Rotterdam, ISBN 90 5809 1554 Poroelastic modeling of drying effects around deep cavities excavated in shales A.Giraud, E Homand & M. Souley Laboratoire Environnement Giome'canique et Ouvrages, ENSG, Nancy, France 0.Ozanam ~ V D...

... ABSTRACT ABSTRACT : This paper presents a theoretical approach to establish a suitable law to describe the hydromechanical behavior of shales. Because of microscopic chemo-hydro-mechanical interactions, the poroelastic theory cannot be simply applied to these rocks. The proposed approach uses...

... ABSTRACT ABSTRACT: A series of thick-walled hollow cylinder tests was conducted on a synthetic shale. The tests were performed under both hydrostatic (essentially isotropic) and plane strain (with elevated initial axial deviatoric stress) conditions. The purpose of the tests...

... hitherto are worthy of presentation. 2 GENERAL ROCK MASS DESCRIPTION Carpathian Flysch is sedimentary rock mass composed of sandstone layers, interbedded with clay shales. It is intersected with two sets of joints, which are ahnost perpendicularly inclined to the layers(Thiel 1993). In many cases rock mass...

... ABSTRACT: This paper presents several methods for determining the deformability, tensile strength, and fracture toughness of anisotropic rocks by diametral compression (Brazilian loading) of thin discs of rocks. The mechanical and fracture properties of several sandstones and one shale were...