In-situ stresses in the Southern Perth Basin at the GSWA Harvey-1 well site

Vamegh Rasouli; Marina Pervukhina; Tobias M. Müller; Roman Pevzner

doi:10.1071/EG13046

ISSN: 0812-3985
E-ISSN: 1834-7533

In-situ stresses in the Southern Perth Basin at the GSWA Harvey-1 well site
Authors Vamegh Rasouli^a,d, Marina Pervukhina^b, Tobias M. Müller^b and Roman Pevzner^c
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^a Department of Petroleum Engineering, Curtin University, Perth, WA 6151, Australia. ^b CSIRO Earth Science and Resource Engineering, Kensington, WA 6151, Australia. ^c Department of Exploration Geophysics, Curtin University, Perth, WA 6151, Australia. ^d Corresponding author. Email: [email protected]
Publisher: Australian Society of Exploration Geophysicists
Source: Exploration Geophysics, Volume 44, Issue 4, Dec 2013, p. 289 - 298
DOI: https://doi.org/10.1071/EG13046
- Received: 10 May 2013
- Accepted: 19 Oct 2013
- Published online: 01 Dec 2013

Abstract

Knowledge of orientations and magnitudes of present-day stresses is important for different applications including fault reactivation, borehole stability and CO2 injection studies. As part of the West Hub Carbon Capture and Storage project, the GSWA Harvey-1 well was drilled in early 2012. It is located ~115 km south of Perth and is used to assess the suitability for CO2 underground storage. The aim of this study is to estimate the mechanical properties and state of stress fields in the Southern Perth Basin. The analysis is based on the newly acquired log and VSP data and results of a rock mechanical model including vertical profiles of elastic and strength properties as well as identified breakout zones. The results indicate that the stress regime in the region is dominantly strike-slip. It changes to a reverse faulting system at shallow depths of below ~900 m. Stress field orientation is obtained from borehole breakout analysis. The average azimuth of the maximum horizontal stress is 106° and the standard deviation is 10°. This direction of the maximum horizontal stress is broadly consistent with the east–west direction earlier reported for the Perth Basin.

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In-situ stresses in the Southern Perth Basin at the GSWA Harvey-1 well site

Exploration Geophysics 44, 289 (2013); https://doi.org/10.1071/EG13046

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Article Type: Research Article

Keyword(s): borehole breakouts; GSWA Harvey-1; in-situ stresses; Southern Perth Basin; strike-slip

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In-situ stresses in the Southern Perth Basin at the GSWA Harvey-1 well site

Abstract

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