... to the immanent weaknesses of the four-arm caliper analysis. dif magnitude image log principal stress deviation sh magnitude initiation reservoir geomechanics orientation technical operation determination sh orientation borehole reservoir characterization borehole wall well 14 drilling...

... of elevated horizontal stresses. The computed safe mud densities for wellbore elastic stability ranged from 10 to 15 ppg, depending on location, well azimuth, and deviation. High mud densities did not necessarily alleviate instability, as indicated by stability-days, a method of tracking the stable- time...

... Abstract Stuck pipes have three different origins : hole geometry (excessive dog legs in highly deviated wells), pack off (wellbore instability or bad hole cleaning leading to a plugging of the annulus) and differential sticking (drill string embedded into the mud cake due to an excessive...

.... As a result, both longitudinal and transverse fractures are present at the wellbore. Extensive calculations detailing the orientation of the initial fracture relative to the wellbore and the preferred fracture plane are presented for all borehole deviations relative to the preferred fracture plane...

... Abstract Conventional models of hydraulic fracture closure make assumptions about the fracture geometry and rock mechanical behaviour, In this paper we present the results of scaled laboratory experiments, We show that deviations from conventional assumptions influence leak-off volumes...

... is insufficient. Vertical casing with adequate support has been compacted 10% without developing excessive dogleg. Compaction of deviated casing results in casing ellipticity and bending. The model test results are confirmed by field observations (borehole televiewer data). The experimental results indicate...

... as on interpretation techniques. In 1993/1994, part of the surveys has been re-interpreted, using a new marker position algorithm, and a selection mechanism has been developed to identify statistically significantly deviating data. As a result, in all but one well could the vertical compressibility be obtained...

... and drainage distance united states government experiment deviation geological subdiscipline subregion Introduction A brief review The horizontal well technology matured in the 1980's and its use increased quickly, with 39 wells drilled worldwide in 1986, 285 drilled in 1989, and about 1000...