... and disseminating geospatial information. This in- formation could be basic site investigation data, such as geomorphology and geology conditions, and diverse, continually evolving geotechnical parame- ters, such as displacement and pore pressure read- ings from geotechnical instruments. GIS tools focus...

...1 INTRODUCTION Any process related to petroleum production re- quires knowledge of the rock properties under some particular combination of confining pressure (Pc) and pore pressure (Pp) (Warpinski & Teufel 1993). Knowledge about the combined effect of external pressure and pore pressure may...

... and pore pressure distribution around the well- bore. In this work, the initial shape and extension of the wellbore failure are determined for elastic, poroelas- tic and porothermoelastic models as a function of the in situ stress, wellbore orientation , rock strength, and drilling fluid pressure...

... on confined testing re- sults, that this could range as high as 4 MPa, howev- er other considerations discussed below could result in even higher pressures. 4.2 Effective vs. total pressure It is believed that in-situ swelling is controlled by the effective pressure, i.e. pore pressure within the rock mass...

...1 INTRODUCTION A considerable number of oil and gas reservoirs in the world are located in unconsolidated sands or in the naturally fractured formations. These compli- cated formations usually have not only highly over- pressured pore pressure and abnormal in-situ stresses, but also very low...

... wells and cause 90% of the drilling problems related to wellbore instability (Tan et al. 2002). One common means for improving wellbore stabil- ity is to add various salts to the drilling fluid. Suc- cess of this approach relies on alteration of the (cou- pled) pore pressure and stress fields...

... for these experiments. It can subject a cylin- drical rock sample to confining pressure and pore pressure of up to 10,000 psi, but does not provide the capability for wellbore pressure and postperfora- tion flow. This way it is possible to perform two single-shot perforation tests in one day and collect a large amount...