The <i>in situ</i> stress field of the Perth Basin, Australia

Reynolds, Scott; Hillis, Richard R.

doi:10.1029/2000gl011538

Cited by 25 publications

(9 citation statements)

References 13 publications

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“… (a) Horizontal cross‐section through a vertical well illustrating the orientation of borehole breakouts and drilling‐induced tensile fractures with respect to σ Hmax . (b) Example from a caliper log illustrating the occurrence of borehole breakout (Reynolds & Hillis, 2000). (c) Example of a resistivity log (FMI) demonstrating the occurrence of borehole breakouts and drilling‐induced tensile fractures from the Perth Basin, Australia (King et al , 2008).…”

Section: Log Interpretationmentioning

confidence: 99%

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Present‐day stresses in Brunei, NW Borneo: superposition of deltaic and active margin tectonics

et al. 2010

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The Baram Delta System, Brunei, NW Borneo, is a Tertiary delta system located on an active continental margin. Delta top regions in many Tertiary delta systems (e.g. Niger Delta) are thought to exhibit a normal‐fault stress regime and margin‐parallel maximum horizontal stress orientations. However, unlike in passive margin Tertiary delta systems, two present‐day stress provinces have been previously identified across the Baram Delta System: an inner shelf inverted province with a margin‐normal (NW–SE) maximum horizontal stress orientation and an outer shelf extension province with a margin‐parallel (NE–SW) maximum horizontal stress orientation. Before this study, there were few data constraining the inverted province other than in the vicinity of the Champion Fields. New data from 12 petroleum wells in the western inner shelf and onshore west Brunei presented herein confirm the margin‐normal maximum horizontal stress orientations of the inverted province. A total of 117 borehole breakouts, all documented in shale units, and one drilling‐induced tensile fracture (in a sandstone interval) reveal a mean maximum horizontal stress orientation of 117 with a standard deviation of 19°. This orientation is consistent with contemporary margin‐normal maximum horizontal stress orientations of the inverted province described previously in the vicinity of the Champion Fields that have been linked to basement tectonics of the Crocker–Rajang accretionary complex and associated active margin. However, stress magnitudes calculated using data from these 12 petroleum wells indicate a borderline strike–slip fault to normal fault stress regime for the present day; combined with the absence of seismicity, this suggests that the studied part of the NW Borneo continental margin is currently tectonically quiescent.

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Section: Log Interpretationmentioning

confidence: 99%

“…3a). DITFs form due to tensile failure at the borehole wall when the minimum circumferential stress exceeds (assuming negative (Reynolds & Hillis, 2000). (c) Example of a resistivity log (FMI) demonstrating the occurrence of borehole breakouts and drilling-induced tensile fractures from the Perth Basin, Australia (King et al, 2008).…”

Section: Log Interpretationmentioning

confidence: 99%

Present‐day stresses in Brunei, NW Borneo: superposition of deltaic and active margin tectonics

et al. 2010

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“…Following the approach of Hillis & 168 Reynolds (2000Reynolds ( , 2003 we applied a Rayleigh Test to the individual stress orientation 169 data to investigate whether, and how strongly developed, any preferred stress 170 orientation is within the study area. The Rayleigh Test determines the confidence 171 level at which we can reject the null hypothesis that stress orientations within a given 172 region are random (Mardia, 1972;Coblentz & Richardson, 1995 The three wells located in the NE of the study area (in the Møre and Magnus 177 basins and on the Erlend High, hereafter referred to as the NE province) reveal 178 broadly consistent, NW-SE to NNW-SSE σ Hmax orientations (Fig.…”

Section: Introduction 31mentioning

confidence: 99%

Contemporary stress orientations in the Faroe–Shetland region

Holford

Tassone

Stoker

et al. 2015

JGS

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The Faroe–Shetland region of the NE Atlantic continental margin contains a number of complexly structured Mesozoic–Palaeogene-age rift basins, but in comparison with the contiguous British Isles and North Sea Basin, the state of crustal stress in the Faroe–Shetland region is poorly understood. The orientation of maximum horizontal compressional stress (σ Hmax ) across most of NW Europe is roughly NW–SE, which is considered to be controlled by forces acting at the plate boundaries. We have determined 16 B–D quality σ Hmax orientations based on borehole breakouts interpreted in petroleum wells, and define three distinct stress provinces within the Faroe–Shetland region. Stress orientations in the NE are roughly NW–SE, consistent with the regional pattern of stresses in NW Europe and local neotectonic structural trends. However, contemporary stress orientations in the central and SW of the Faroe–Shetland region exhibit short-wavelength (distances <10–50 km) variation, with NE–SW, north–south and east–west orientations that are parallel or subparallel to underlying structural trends. This variation is interpreted in terms of stress deflections towards weak faults that downthrow the Mesozoic–Cenozoic sedimentary successions against basement highs. These local-scale sources are superimposed on a background roughly WNW–ESE σ Hmax orientation that is controlled by both plate boundary forces and regional-scale sources of stresses.

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“…Despite the scattered in situ stress measurements, the regional stress field in the Flinders Ranges appears to be consistent with that of the Cooper Basin. An east–west S Hmax orientation has also been recorded for the Perth region, located in southwestern Australia (Reynolds & Hillis 2000; Fig. 2).…”

Section: Stress Orientations In the Cooper Basin And Surrounding Areasmentioning

confidence: 58%

Maximum horizontal stress orientations in the Cooper Basin, Australia: implications for plate-scale tectonics and local stress sources

Reynolds¹,

Mildren²,

Hillis³

et al. 2004

Geophysical Journal International

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SUMMARY Borehole breakouts and drilling‐induced tensile fractures (DITFs) were interpreted in 61 wells in the Cooper Basin indicating an average maximum horizontal stress orientation of 101°N. A total of 890 borehole breakouts and 608 DITFs were interpreted in the Cooper Basin. The approximately east–west maximum horizontal stress orientation is consistent over much of the basin, except in the Patchawarra Trough where maximum horizontal stress rotates to a northwest–southeast orientation. This rotation in maximum horizontal stress orientation is consistent with in situ stress data to the northwest of the Cooper Basin. The stress field in the Cooper Basin appears to mark the apex of a major horseshoe‐shaped rotation in maximum horizontal stress direction across central eastern Australia. Finite element modelling of the in situ stress field of the Indo–Australian Plate (IAP) using a range of plate‐scale tectonic forces is able to match the regional maximum horizontal stress orientation over most of Australia reasonably well, including the mean east–west maximum horizontal stress orientation in the Cooper Basin. However, plate boundary–scale modelling does not adequately match the horseshoe‐shaped stress rotation across central eastern Australia. The average east–west maximum horizontal stress orientation in the Cooper Basin indicates that stresses from tensional forces acting along the Tonga–Kermadec subduction zone are not transmitted into the interior of the Australian plate. The majority of the tensional forces associated with the Tonga–Kermadec subduction zone are most likely accommodated along the numerous spreading centres within the Lau–Havre backarc basin. A number of more localized stress anomalies have also been identified. These cannot be explained by plate‐scale tectonic forces and are possibly a result of geological structure and/or density contrasts locally perturbing the stress field.

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The in situ stress field of the Perth Basin, Australia

Abstract: Abstract.A

Cited by 25 publications

References 13 publications

Present‐day stresses in Brunei, NW Borneo: superposition of deltaic and active margin tectonics

Present‐day stresses in Brunei, NW Borneo: superposition of deltaic and active margin tectonics

Contemporary stress orientations in the Faroe–Shetland region

Maximum horizontal stress orientations in the Cooper Basin, Australia: implications for plate-scale tectonics and local stress sources

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