In situ stress state in the Nankai accretionary wedge estimated from borehole wall failures

Chang, Chandong; McNeill, Lisa C.; Moore, J. Casey; Lin, Weiren; Conin, Marianne; Yamada, Yasuhiro

doi:10.1029/2010gc003261

Cited by 118 publications

(228 citation statements)

References 59 publications

(73 reference statements)

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“…Since the borehole deviation of C0009 is kept at less than 0.25 degrees for most of its interval (Figure 2c), the hole deviation effect on the azimuth of breakouts and tensile cracks can be neglected in this analysis. [Tobin et al, 2009;Chang et al, 2010]. Site C0009 drilled in stage 2 of this study is in green diamond.…”

Section: Borehole Condition and Stress Orientation At Site C0009mentioning

confidence: 99%

“…It aims to sample and monitor the seismogenic zone and the shallow portion of the subducted plate boundary, offshore southeastern Japan ( Figure 1a). From 2007 to 2009, on-site stress orientations were determined from borehole breakouts and drillinginduced tensile fractures identified from logging while drilling (LWD) image logs in six holes [Tobin et al, 2009;Saffer et al, 2010;Chang et al, 2010]. Site C0006 was drilled near the toe across the frontal thrust; Sites C0001, C0010, and C0004 were drilled near the megasplay fault ( Figure 1b).…”

Section: Introductionmentioning

confidence: 99%

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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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Section: Borehole Condition and Stress Orientation At Site C0009mentioning

confidence: 99%

Section: Introductionmentioning

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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“…Analyses indicate a mean azimuth of 51° and, therefore, an azimuth of 141° for S HMAX . This northwest-southeast trend is roughly parallel to the convergent direction of the Philippine Sea plate and to the dominant S HMAX determined at previous IODP Nankai Trough Seismogenic Zone Experiment (NanTroSEIZE) Sites C0001, C0004, C0006, and C0009 (Chang et al, 2010;Lin et al, 2010;Byrne et al, 2009;Kinoshita et al, 2008) and Ocean Drilling Program Site 808 (Ienaga et al, 2006;McNeill et al, 2004).…”

Section: Borehole Breakoutsmentioning

confidence: 91%

“…Breakouts typically form perpendicular to the direction of maximum horizontal stress (S HMAX ) in the borehole. Breakout width can be related to the horizontal differential stress (e.g., Chang et al, 2010). In Hole C0018B, the depth intervals immediately following a pipe connection, indicated by time-after-bit measurements, show significantly wider breakouts than the rest of the formation, particularly in the upper section (Fig.…”

Section: Borehole Breakoutsmentioning

confidence: 99%

Site C0018

Strasser¹,

Dugan²,

Kanagawa³

et al. 2014

Proceedings of the IODP

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During Integrated Ocean Drilling Program (IODP) Expedition 338, a slope basin seaward of the megasplay fault was logged with logging while drilling (LWD)/measurement while drilling (MWD) at Site C0018. The slope basin, characterized in 3-D seismic data by stacked mass transport deposits (MTDs) was drilled and sampled during IODP Expedition 333 in Hole C0018A ( Fig. F1) (Expedition 333 Scientists, 2012a). The primary goals of operations at Site C0018 were to establish the stratigraphy of Quaternary mass-movement events and to sample the distal part of an exceptionally thick MTD for analyzing its rheological behavior to constrain sliding dynamics and tsunamigenic potential.Site C0018 (proposed Site NTS-1A; water depth = 3084.35 m) is located ~5 km southwest of IODP Sites C0004 and C0008, which were drilled and cored during IODP Expedition 316 (Figs. F1, F2). Site C0018 is located within a lower slope basin that (1) represents the depocenter for downslope mass transport, (2) is characterized by stacked MTDs that were seismically identified as acoustically transparent to chaotic bodies with ponded geometries (Fig. F2), and (3) includes a large (as thick as 182 m) MTD . Hole C0018A was drilled at a location where the MTD bodies wedge out and basal erosion is thought to be minimal. Coring to ~314.15 meters below seafloor (mbsf) allowed sampling of the MTDs across this stratigraphic succession.Sediment cored in Hole C0018A are divided into two lithologic subunits. Lithologic Subunit IA (0-190.65 mbsf) is primarily composed of hemipelagic mud (i.e., silty clay) with interbedded volcanic ash layers and is affected by MTDs, whereas lithologic .65 mbsf) is a sandy turbidite sequence (Expedition 333 Scientists, 2012a;Strasser et al., 2012). Six MTDs (numbered 1-6 from top to bottom) ranging in thickness from 50 cm to 61 m are identified within Subunit IA (Expedition 333 Scientists, 2012a;Strasser et al., 2012) (Fig. F3). These MTDs are composed of chaotic and convolute bedding with intervals of coherent bedding and commonly have bases defined by shear zones. A mass-movement event related to deposition of the lowermost and most prominent MTD 6 is younger than 1.05 Ma (because an ash layer immediately below the thick MTD 6 is identified as the one dated on land as 1.05 Ma) but older than 0.85 Ma, as constrained

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“…In a vertical borehole, the orientation of breakouts is a well-established indicator of the orientation of the horizontal maximum principal stress in the present-day stress field (Zoback et al, 2003). Borehole breakouts have been used for stress estimation in NanTroSEIZE Stage 1 and previous expeditions on the Nankai margin (McNeill et al, 2004;Ienaga et al, 2006;Chang et al, 2010). This is the case for stress orientation but not for stress magnitude.…”

Section: Introductionmentioning

confidence: 99%

Operational Review of the First Wireline In Situ Stress Test in Scientific Ocean Drilling

Thu

Ito

Lin

et al. 2012

Scientific Drilling

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Scientific ocean drilling’s first in situ stress measurement was made at Site C0009A during Integrated Ocean Drilling Program (IODP) Expedition 319 as part of Nankai Trough Seismogenic Zone Experiment (NanTroSEIZE) Stage 2. The Modular Formation Dynamics Tester (MDT, Schlumberger)wireline logging tool was deployed in riser Hole C0009A to measure in situ formation pore pressure, formation permeability (often reported as mobility=permeability/viscosity), and the least principal stress (S3) at several isolated depths (Saffer et al., 2009; Expedition 319 Scientists, 2010). The importance of in situ stress measurements is not only for scientific interests in active tectonic drilling, but also for geomechanical and well bore stability analyses. Certain in situ tools were not previously available for scientific ocean drilling due to the borehole diameter and open hole limits of riserless drilling. The riser-capable drillship, D/V Chikyu,now in service for IODP expeditions, allows all of the techniques available to estimate the magnitudes and orientations of 3-D stresses to be used. These techniques include downhole density logging for vertical stress, breakout and caliper log analyses for maximum horizontal stress, core-based anelastic strain recovery (ASR, used in the NanTroSEIZE expeditions in 2007–2008), and leak-off test (Lin et al., 2008) and minifrac/hydraulic fracturing (NanTroSEIZE Expedition319 in 2009). In this report, the whole operational planning process related to in situ measurements is reviewed, and lessons learned from Expedition 319 are summarized for efficient planning and testing in the future

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In situ stress state in the Nankai accretionary wedge estimated from borehole wall failures

Cited by 118 publications

References 59 publications

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

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

Site C0018

Operational Review of the First Wireline In Situ Stress Test in Scientific Ocean Drilling

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