..., the stress magnitudes and orientations, the rock strength, and the well trajectory. This paper presents a case history of using a geomechanical model to optimize the design of a deviated wellbore in West Delta block 83, GOM to prevent similar problems to those in offset wells. Data from two offset wells...

... relationships between fracture system geometry and underlying geologic mechanisms. The model employs Poisson plane and line processes as well as random spatial rotation and translation to represent fracture orientations, intensity, and relations to major geologic structures. The model is implemented...

... is obtained from the results of triaxial compression tests. The analyses show that certain well and perforation orientations will be vulnerable to sanding, but that other well and perforation orientations are expected to remain stable even after repeated injection and shut-down cycles. 1. INTRODUCTION Wells...

... ABSTRACT: Because the integrity of the wellbore plays an important role in many well operations, this work focused on studying the complex problem of the stability of multilateral junctions at different orientations in a three-dimensional anisotropic in-situ stress field, based on finite...

.../orientation, perforation orientation, reservoir pressure depletion and water-cut on sand production potential was evaluated. The study shows that sand production is unlikely in the early stage of production for all the fields. However, sand production is likely to occur in some reservoir formations when...

... and lost circulation pressures. Both of these are functions not only of the position of the well in the field but also of wellbore orientation [3,4]. In order to compute collapse and lost circulation pressures from velocities, it is necessary to utilize quite general relationships between velocity...

... ABSTRACT: Methods of automatically extracting rock discontinuity orientations from digital images and 3D models generated using current laser scanning technology are under development. Using a series of image processing algorithms, fracture traces can be delineated from digital images...

... ABSTRACT: A comprehensive suite of geophysical logs was collected in the SAFOD Pilot Hole in Parkfield, CA. from a depth of 775 m to 2150 m in highly fractured Salinian granite. The Pilot Hole intersected numerous macroscopic fractures and faults with extremely varied orientations. Despite...

... ABSTRACT: In this paper, we describe a method to estimate, in real-time, the volume of a hydraulic fracture from tiltmeter measurements recorded during the treatment. The resolution of fracture dimensions and orientation is discussed at first. A limit, expressed in terms of the distance...

.... Artificial Intelligence US government metals & mining Upstream Oil & Gas Discontinuity orientation discontinuity photography Engineering accuracy prediction variation ROCK mass CHARACTERIZATION stability rock mass image understanding orientation variability modeling program point...

... permeability, depth, footprint layout and tunnel stability. All of these factors are influenced by the stress magnitudes and orientation; hence every effort must be made to constrain the stress tensor as much as practical. 1. INTRODUCTION The Swedish Nuclear and Fuel Waste Management Company (SKB) is owned...

... directions of symmetry. 3D FEA modeling and orthotropic elastic symmetry was used to represent the behavior of arbitrarily oriented wellbores on layered media. The media (presently restricted to homogeneous bedded media) is assumed to be transversely isotropic with 3D failure criterion varying...

... fracture treatments to provide a time history of the complete three dimensional stress changes that occurred as each hydraulic fracture grew toward and then passed close to the instruments. Analysis of the stress change data provides information about the fracture rate and mode of growth, orientation...

.... Upstream Oil & Gas well pi reduction procedure orientation well productivity index reduction pi reduction area 5000 Fluid Dynamics flow in porous media productivity index productivity configuration well configuration permeability rock compaction vertical well equation production rate...

... plane orientation tunnel face tunnel diameter interface tunnel wall displacement distance interface-tunnel face transverse isotropy wall displacement Pacific Rocks 2000, Girard, Liebman, Breeds & Doe (eds) © 2000 Balkema, Rotterdam. ISBN 90 5809 1554 Detection of rock mass weakness ahead...

... Reservoir Characterization orientation Schubert brittle fault zone Fault Zone mechanics investigation rock mass tunnel deformation excavation construction gouge geologic modeling fracture characterization heterogeneity evaluation interpretation geotechnical monitoring Pacific Rocks 2000...

... ABSTRACT ABSTRACT: This paper presents a case study whereby oriented borehole data were used to characterize a rock mass. In particular the influence of random joints in the resulting block size distribution is investigated and its implications discussed. The analysis can contribute...

... to cave. fracture growth borehole rock mass hydraulic fracturing shear contour Orebody fracture Upstream Oil & Gas injection hydraulic fracture treatment cave back stress field principal stress orientation microseismic event cave boundary fracture treatment Northparke...

... of a true triaxial homogeneous state of compressive stresses (s 1 > s 2 > s 3 ). The samples were loaded in such a way that the maximum principal stress (s 1 ) was oriented at angle ß=90° to the foliation planes (which is the direction of the highest compressive strength), or at angle ß=30...

... Intelligence recovery weighting cluster structure algoritlun information weighting algorithm Standardization gnanadesikan orientation transformation cluster analysis discontinuity data Milligan algorithm weighting scheme Pacific Rocks 2000, Girard, Liebman, Breeds & Doe (eds) 63 2000 Balkema...