... and shear) and bulk density of the porous frame are estimated. Shale anisotropy, which has effect on wellbore stability analysis especially in highly deviated and shale-rich wells is corrected for in the process. The in-situ static relationship for dynamic-to-static elastic moduli transform is provided...

... horizons. The critical step is to extract from the 3D pressure model the pressure along each mapped horizon and plot the pressure with depth for each. For a shale horizon, the result reflects a linear shale gradient (e.g. ~0.83 psi/ft) consistent with restricted lateral pressure communication. Conversely...

... location can point to the possible pressure transgressive intervals that can cause a sudden pressure surge (PS). Moreover, modifying the drilling tolerance window (DTW) to accommodate the expected hydrocarbon column in the prospective reservoirs reduces the potential of unexpected hard kicks at the shale...

... waterflooding channel sand reservoir fracture length enhanced recovery modeling & simulation stress contrast hydraulic fracturing height growth drillstem/well testing fracture propagation shale bhp reservoir injection rate upstream oil & gas fracture growth reservoir pressurization...

... trends such as velocity, density, resistivity follows a compaction trend in this zone. As result of depositing shale seal in zone C, due to high stand sea level, fluid is prevented from permeating upward. This low permeable top seal is referred to as top of geopressure (TOG). The geopressured section...

... with potential greater uncertainty. The present study uses well data and post-stack seismic amplitudes to estimate volumes of porosity and saturation for gas and oil sands. An advantage associated with the data set used here is that P-impedance discriminates sands and shale. Gas and oil sands, however, overlap...

... and therefore overlooked. The resistivity suppression is caused by a lack of conventional tool resolution and the presence of conductive shale lamina. This paper will describe advanced techniques for effective evaluation of the low-resistivity laminated shaly sand sequences. To accurately identify and quantify...

... Abstract Water-based mud formulations inclusive of nanosilicas offer the possibility for improved shale inhibition with reduced environmental impact over conventional shale inhibitors. These additives may be effective in maintaining well stability and in preventing equipment problems...

... effects. The resulting inversion outputs, acoustic and shear impedance, were used to derive shale and sand probability volumes. Well based analysis was used to determine the best relationship between acoustic and shear impedance and Young's Modulus for both sand and shale facies. Using the facies...

... study example. The technique implemented in a new MPD control software platform for real time analysis of the dynamic PPT data to forecast the pore pressure of the following formations while drilling. correlation well logging real time system shale drilling parameter annular pressure drilling...

... horizontal stress basin shale tectonic deformation coefficient audemard miocene upstream oil & gas estimation ArnaÍz , M. : "Modelo gravimétrico cortical de la zona Noroccidental de Venezuela" , BSc thesis , Universidad Central de Venezuela, Caracas ( 2009 ). Audemard , F.E...

... reservoirs have been recognized where fluid flow is driven by lateral drainage, typically found in laterally extensive reservoirs. The lateral drainage of pressure in reservoir sand units leads to a pressure gradient from higher pressured non-reservoir sediments (shales) above and below into the reservoir...

.... Maximum horizontal stress was inferred from observed breakouts. Pore pressure and stresses were combined with formation properties from well logs and laboratory rock mechanics tests to provide input for elasto-plastic (shales) and poro-elastic (sands) borehole stability models. These techniques...

... specific to very-low-silt shales, and also that the analysis only be performed upon relatively silt-free shales. As a practical matter, the gamma ray log is used to distinguish shales which are low enough in silt to be appropriate for comparison to the normal compaction trend. (Other methods of determining...

... Abstract Currently, the industry relies on shale velocity and electrical resistivity trends to model compaction and pore pressure. These methods do not properly identify the interrelated shale compaction properties, important to geoscientists, as well as drillers, of porosity, pore pressure...

... extensive and vertically thick marine shales overly these potential reservoir intervals and provide an appropriate seal across the region. This petrophysical analysis was integrated with interpretations from available two dimensional seismic lines to investigate the spatial potential of the targeted...

... straight from the casing shoe at the heel of the horizontal to the planned toe of the well with no active geosteering intended. This was based on the results from the vertical exploration and appraisal wells showing massive sands with limited interbedded shale. The drilling assembly was planned as a push...

... manage hazards, one of which is what can be referred to as listening to the well (Weatherford 2008). Listening to the well is simply recognizing, integrating, and correctly interpreting all drilling dynamics, WOB, RPM, ECD, and shale shaker cuttings, to assist in making the correct decision while...

... Abstract The development of domestic oil shale resources has regained significant attention in the past few years. Several factors have contributed to this, including high oil prices, emerging recovery technologies, increasing world demand for liquid hydrocarbons, and the continued decline...

... lying beneath as well. Oil shales are found in New Brunswick, Nova Scotia and Newfoundland. Stealth Ventures Ltd. has committed to eastern Canada's first coalbed methane production agreement in the Cumberland Basin of western Nova Scotia. One nearshore well drilled just in the same rock units...