Experimental observations of the mechanics of borehole failure in porous sandstone

Cuss, R.J.; Rutter, E. H.; Holloway, R.F.

doi:10.1016/s1365-1609(03)00068-6

Cited by 69 publications

(36 citation statements)

References 26 publications

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“…As the borehole diameter increases, the energy transferred to the surrounding rock increases which is due to increase of strain energy component with increasing borehole diameter. Cuss et al (2003) obtained similar results in their experiments with sandstone. …”

Section: Mesh Convergence Studysupporting

confidence: 66%

Energy analysis of hydraulic fracturing

Golshani

Tran-Cong

2009

KSCE J Civ Eng

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In this paper, numerical simulations of circular boreholes under internal hydraulic pressure are carried out to investigate the energy transferred to the surrounding rock and the breakdown pressure. The simulations are conducted by using a micromechanical continuum damage model proposed by Golshani et al. (2006). The simulation results suggest that the borehole breakdown pressure and the energy transferred to the surrounding rock are dependent on the mechanical properties of the rock and borehole size. Although the energy transferred to the surrounding rock increases with increasing borehole size, the borehole breakdown pressure decreases.

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Section: Mesh Convergence Studysupporting

confidence: 66%

Energy analysis of hydraulic fracturing

Golshani

Tran-Cong

2009

KSCE J Civ Eng

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“…The diametrically opposed failed zones consistently exhibited 'V'-shaped (also called 'dog-eared') breakouts, wide at the borehole wall and relatively short (or shallow). This breakout shape is common in crystalline rocks [4], limestones [5], and lower porosity sandstones [6,16]. Previously, our experience with high-porosity rocks was that they failed in a fracture-like manner (Fig.…”

Section: Breakout Shape and Dimensionsmentioning

confidence: 72%

“…However, sandstones that possess 50-75% quartz developed V-shaped breakouts and no compaction bands, such as lowporosity Berea [7,26], Kyune [28], as well as the present Tablerock sandstone. More recently Cuss et al [16] obtained V-shaped breakouts in three sandstones (Tennessee, Darley Dale, and Penrith), which varied in porosity from 7-28% but had only 70-75% quartz.…”

Section: Discussion Of Breakout Micromechanicsmentioning

confidence: 99%

Borehole breakouts and compaction bands in two high-porosity sandstones

Haimson

Lee

2004

International Journal of Rock Mechanics and Mining Sciences

123

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“…Plumb & Hickman (1985) found that the long axes of borehole breakouts in vertical wells are oriented approximately parallel to the azimuth of the minimum horizontal stress (S hmin ), with the orientation of the maximum horizontal stress (S Hmax ) perpendicular to the direction of borehole breakout. In contrast, the orientation of breakouts may also be influenced by material strength and/or elastic anisotropy in areas where there is low differential between the horizontal stresses, suggesting that rock fabric may dictate breakout orientation in some cases (Cuss et al 2003).…”

Section: Borehole Breakoutsmentioning

confidence: 99%

In-situ stress orientations in the UK Southern North Sea: Regional trends, deviations and detachment of the post-Zechstein stress field

Williams

Fellgett

Kingdon

et al. 2015

Marine and Petroleum Geology

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The orientation of the maximum horizontal compressive stress (S Hmax ) in the UK Southern North Sea has been determined using data derived from borehole breakout analysis of four-arm caliper logs.The results agree with existing stress models for NW Europe, confirming that horizontal stresses in the region have an approximately NW-SE orientation of S Hmax . This is interpreted as being a result of plate boundary convergence. Local deviations in the horizontal stress orientations are observed spatially and also vertically within some wells. Some of these deviations are attributed to rotations of the stress field adjacent to faults or between different fault blocks. The data also suggest detachment of the stress regime in the post-Permian cover rocks, caused by the presence of a thick underlying Permian-aged evaporite sequence and associated halokinesis. Despite the generally low scoring of the stress measurements when compared with the quality ranking scheme proposed by the World Stress Map project, the consistent orientation of the stress trajectories suggests that these data are reliably indicative of regional stress orientations. Analyses of borehole resistivity image logs have been used to verify the calculated stress orientations in some wells. These image logs validate some measurements whilst highlighting a number of deficiencies in the use of four-arm caliper data to characterise borehole breakouts. From the available data it is difficult to unambiguously define the nature of variations from the mean stress orientations observed. Further analysis of image log data over greater depth intervals is therefore required in order to investigate more fully the effects of stress rotations near faults and apparent stress detachment above saltcored anticlinal structures.

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Experimental observations of the mechanics of borehole failure in porous sandstone

Cited by 69 publications

References 26 publications

Energy analysis of hydraulic fracturing

Energy analysis of hydraulic fracturing

Borehole breakouts and compaction bands in two high-porosity sandstones

In-situ stress orientations in the UK Southern North Sea: Regional trends, deviations and detachment of the post-Zechstein stress field

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