Integrating borehole-breakout dimensions, strength criteria, and leak-off test results, to constrain the state of stress across the Chelungpu Fault, Taiwan

Haimson, Bezalel C.; Lin, Weiren; Oku, Haruyuki; Hung, Jung Chou; Song, Sheng-Rong

doi:10.1016/j.tecto.2009.05.016

Cited by 44 publications

(15 citation statements)

References 12 publications

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“…However, the deterministic methodology applied does not provide a complete solution for both S Hmax and S hmin because the single equation cannot resolve two unknowns. Thus, we have to obtain one of these values from an independent method (e.g., leak-off test) [Haimson et al, 2010;Lee et al, 2013] or identify a potential range for the two horizontal stresses a priori [Chang et al, 2010;Huffman and Saffer, 2016]. To find the magnitudes of both S Hmax and S hmin , we propose a stochastic method using the probability distribution that can be obtained from the breakout width and UCS data sets for a wellbore, as shown in Figure 5.…”

Section: Present-day In Situ Stressmentioning

confidence: 99%

In situ stress conditions at IODP Site C0002 reflecting the tectonic evolution of the sedimentary system near the seaward edge of the Kumano basin, offshore from SW Japan

Song

Chang

2017

JGR Solid Earth

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This paper presents a complete set of in situ stress calculations for depths of 200–1400 meters below seafloor at Integrated Ocean Drilling Program (IODP) Site C0002, near the seaward margin of the Kumano fore‐arc basin, offshore from southwest Japan. The vertical stress component was obtained by integrating bulk density calculations from moisture and density logging data, and the two horizontal components were stochastically optimized by minimizing misfits between a probabilistic model and measured breakout widths for every 30 m vertical segment of the wellbore. Our stochastic optimization process reveals that the in situ stress regime is decoupled across an unconformity between an accretionary complex and the overlying Kumano fore‐arc basin. The stress condition above the unconformity is close to the critical condition for normal faulting, while below the unconformity the geologic system is stable in a normal to strike‐slip fault stress regime. The critical state of stress demonstrates that the tectonic evolution of the sedimentary system has been achieved mainly by the regionally continuous action of a major out‐of‐sequence thrust fault during sedimentation in the fore‐arc basin. The stable stress condition in the accretionary prism is interpreted to have resulted from mechanical decoupling by the accommodation of large displacement along the megasplay fault.

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Section: Present-day In Situ Stressmentioning

confidence: 99%

In situ stress conditions at IODP Site C0002 reflecting the tectonic evolution of the sedimentary system near the seaward edge of the Kumano basin, offshore from SW Japan

Song

Chang

2017

JGR Solid Earth

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“…Breakouts can have a length between centimetres up to several hundred metres in the borehole wall. Attempts have been made to estimate stress magnitudes from breakout geometry (Haimson and Herrick 1986;Zoback et al 1986;Vernik et al 1992;Haimson and Lee 1995;Haimson et al 2009). Breakout analysis is quick to use and requires only the measurement of the diametrical changes of the borehole wall to obtain the S h -direction.…”

Section: Classification Of Measurement Techniquesmentioning

confidence: 99%

Stress Field of the Earth’s Crust

2010

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“…The effective stress acting on the borehole wall varies with the azimuth in a sinuous curve, so called the hoop stress (s qq ). The maximum and minimum hoop stress are described as following by Barton et al [1988], Jaeger et al [2007], and Haimson et al [2010]:…”

Section: Estimation Of the Magnitude Of The Horizontal Principal Stressmentioning

confidence: 99%

Stress state estimation by geophysical logs in NanTroSEIZE Expedition 319‐Site C0009, Kumano Basin, southwest Japan

Kinoshita

Yukitoshi

2012

Geophysical Research Letters

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To understand the stress regime in the shallow portion of the Nankai Trough seismogenic zone, we carefully investigated the resistivity image logs at IODP Site C0009 that penetrated to 1600 meters below the sea floor (mbsf) in the central Kumano forearc basin. During the riser drilling, several downhole measurements were run including image logs, caliper and comprehensive geophysical logs sets. Borehole resistivity images obtained by a wireline‐logging tool were reprocessed in order to eliminate image artifacts generated by sticky tool movements, etc. The constraints on the possible magnitude and orientation of horizontal principal stresses are provided from the borehole images, rock strength, and logging data. The absence of borehole breakouts above 1285 mbsf represents a small difference (<10 MPa) between horizontal principal stresses and reflects the normal faulting and strike–slip faulting stress regimes. A stable, continuous breakout was observed in the resistivity image logs suggest that the stress state is in a strike–slip faulting and tending to reverse faulting regime below 1285 mbsf. The differential horizontal stress (up to 15 MPa) is significantly larger than in the shallow portion of the borehole (SHAMX ≫ Sv > Shmin).

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Integrating borehole-breakout dimensions, strength criteria, and leak-off test results, to constrain the state of stress across the Chelungpu Fault, Taiwan

Cited by 44 publications

References 12 publications

In situ stress conditions at IODP Site C0002 reflecting the tectonic evolution of the sedimentary system near the seaward edge of the Kumano basin, offshore from SW Japan

In situ stress conditions at IODP Site C0002 reflecting the tectonic evolution of the sedimentary system near the seaward edge of the Kumano basin, offshore from SW Japan

Stress Field of the Earth’s Crust

Stress state estimation by geophysical logs in NanTroSEIZE Expedition 319‐Site C0009, Kumano Basin, southwest Japan

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