... this normal compaction trend are taken to be indicative of the presence of overpressure. However, velocity-based pore pressure prediction methods are not reliable under all geological conditions. The relationship between stress and seismic P-wave velocity is, in general, non-unique because P-wave velocity...

...1. INTRODUCTION Traditional approaches to casing design and mud weight selection have typically been based on predicted pore pressures and empirically determined fracture gradients. The resulting mud weights and casing points are then adjusted based on drilling experience in offset wells, often...

... Characterization pore pressure rock property geometry San Antonio southwest research institute deformation 1. INTRODUCTION In the oil and gas industry, a gap exists between the early phase of exploration, which is driven primarily by the fields of geology and geophysics, and the subsequent drilling...

... and pore pressure fields around an underground opening. This is due to the fact that thermal loading induces volumetric deformation because of thermal expansion/contraction of both the pore fluid and the rock solid. A volumetric expansion can result in significant pressurization of the pore fluid. In order...

...1. INTRODUCTION It has been demonstrated that thermal effects can be very important to both wellbore stability and injection design (Guenot and Santarelli, 1989 [1]; Paige and Murray, 1994 [2]; Charlez, 1997 [3 Formation temperature and formation pore pressure are fully-coupled for fluid flow...

... reservoir geomechanics Upstream Oil & Gas wave velocity elastic wave velocity measurement anisotropic change equation andα 33 model 1 Reservoir Characterization tensor pore pressure sandstone horizontal stress stress field high value contour anisotropy discontinuity stress...

... in each well) pore pressure and overburden pressure, and lithology. In vertical exploration wells we may also deduce the minimum horizontal stress direction from borehole breakouts. Aadnøy [1] developed an inversion technique in 1990. Since directional wells have different orientations (inclinations...

... reservoir geomechanics strength water saturation Upstream Oil & Gas pore pressure flow in porous media sand production particle capillary strength capillary force coefficient permeability proceedings water breakthrough chemical reaction Reservoir Characterization sandstone...

... approach to the problem had a solid foundation. Huang et al. (1998)2 presented a model based on considerations that the pore pressure change and the onset of swelling pressure are two main factors in well- bore instability issue. They investigated water-based drilling fluid interactions with shale...

... Pore Pressure Effects on the Loss of Directional Control, Seismic Energy Release, Bit-Walk, and Lead Angle A. Azar University of Louisiana-at-Lafayette, LA, USA A. Hayatdavoudi University of Louisiana-at-Lafayette, LA, USA Copyright 2004, ARMA, American Rock Mechanics Association This paper...

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... 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...

... ABSTRACT: The degree of certainty in pore pressure estimates from resistivity data is examined through a case study interpreted by eight trained analysts. The relevant data included resistivity, gamma ray, density, and mud weight as a function of depth. A shallow kick pressure and several...

... is the drawdown (given as the in situ pore pressure minus the well pressure) and Dc is the critical drawdown where sand production is initi- ated. Introducing Eq. (8) into Eq. (6) gives us that the volume of the sand producing zone is Figure 1 illustrates graphically the predictions of the model. The parameter...

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... understood, but also might be very small for many of the depleting reservoirs. Reservoir Characterization depletion geomechanical model Upstream Oil & Gas pore pressure overburden geomechanics Reservoir Characteristic fingerprint Reservoir Conditions compressibility saturation change...

... in the reservoir formation. The permeability anisotropy mentioned in the following context is referred to the latter case. Deformations in a reservoir are induced by the changes of pore pressure and temperature due to fluid injection and production in thermal recovery processes, thereby affecting permeability...

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