Stress orientations of Taiwan Chelungpu‐Fault Drilling Project (TCDP) hole‐A as observed from geophysical logs

@article{Wu2007StressOO,
  title={Stress orientations of Taiwan Chelungpu‐Fault Drilling Project (TCDP) hole‐A as observed from geophysical logs},
  author={Hung-Yu Wu and Kuo‐Fong Ma and Mark D. Zoback and Naomi L. Boness and Hisao It{\^o} and Jih-hao Hung and Stephen H. Hickman},
  journal={Geophysical Research Letters},
  year={2007},
  volume={34}
}
The Taiwan Chelungpu‐fault Drilling Project (TCDP) drilled a 2‐km‐deep research borehole to investigate the structure and mechanics of the Chelungpu Fault that ruptured in the 1999 Mw 7.6 Chi‐Chi earthquake. Geophysical logs of the TCDP were carried out over depths of 500–1900 m, including Dipole Sonic Imager (DSI) logs and Formation Micro Imager (FMI) logs in order to identify bedding planes, fractures and shear zones. From the continuous core obtained from the borehole, a shear zone at a… 

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References

SHOWING 1-10 OF 14 REFERENCES

Mapping the northern portion of the Chelungpu fault, Taiwan by shallow reflection seismics

The Chelungpu fault was activated by the 1999 Chi‐Chi earthquake (Mw = 7.6), Taiwan. This fault exhibited extraordinarily large surface ruptures (up to 9.8 m) as well as underground fault slippages

Stress‐induced seismic velocity anisotropy and physical properties in the SAFOD Pilot Hole in Parkfield, CA

A comprehensive suite of geophysical logs was collected in the SAFOD Pilot Hole from a depth of 775 m to 2150 m in highly fractured Salinian granite. The Pilot Hole intersected numerous macroscopic

Stress perturbations associated with active faults penetrated by boreholes: Possible evidence for near-complete stress drop and a new technique for stress magnitude measurement

Detailed studies of stress-induced wellbore breakouts in wells drilled through active faults reveal stress field discontinuities that are apparently associated with recent fault movements. These

Stress‐induced borehole elongation: A comparison between the four‐arm dipmeter and the borehole televiewer in the Auburn Geothermal Well

The nature and origin of borehole elongation recorded by the four-arm dipmeter calipers is studied utilizing information obtained from hydraulic fracturing stress measurements and borehole televiewer

Stress Tensor Inversion for the Chi-Chi Earthquake Sequence and its Implications on Regional Collision

We study the stress regime associated with the 1999 Chi-Chi, Taiwan, earthquake sequence. Broadband waveforms of 115 events recorded by the Broadband Array in Taiwan for Seismology (BATS) are

Well bore breakouts and in situ stress

The detailed cross-sectional shape of stress induced well bore breakouts has been studied using specially processed ultrasonic borehole televiewer data. We show breakout shapes for a variety of rock

Formation imaging with microelectrical scanning

  • arrays, Log Anal.,
  • 1987