In-situ stress project; Technical Report Number 2; Televiewer data report for the test interval 6250-6935 ft, Cajon Pass Well, California

Springer, J.E.; Ader, Mark J.

doi:10.3133/ofr87290

Cited by 8 publications

(2 citation statements)

References 7 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This overall research effort is being conducted by the U.S. Geological Survey in order to determine in-situ stress orientations near the San Andreas Fault as part of a project designed to study fundamental problems related to the processes controlling movement along the fault. Mark Ader of the U.S. Geological Survey used a borehole televiewer to measure the orientations of fractures and breakouts in support of in-situ stress analyses conducted at the site Springer and Ader, 1987). He is now working part time at WSU on a master's degree applying the COPLANEV programs to the Cajon Pass region to assess the local fracture sets developed in the drill site area, the San Gabriel Mountains to the west, and the San Bernardino Mountains to the east.…”

Section: Analysis Of the Continental Scientific Drilling Program Studmentioning

confidence: 99%

Geologic spatial analysis. 1988 performance report, August 30, 1987--January 30, 1989

Thiessen¹,

Eliason²

1989

View full text Add to dashboard Cite

Section: Analysis Of the Continental Scientific Drilling Program Studmentioning

confidence: 99%

Geologic spatial analysis. 1988 performance report, August 30, 1987--January 30, 1989

Thiessen¹,

Eliason²

1989

View full text Add to dashboard Cite

“…This overall research effort is being conducted by the U.S. Geological Survey in order to determine in-situ stress orientations near the San Andreas Fault as part of a project designed to study fundamental problems related to the processes controlling movement along the fault. Mark Ader of the U.S. Geological Survey used a borehole televiewer to measure the orientations of fractures and breakouts in support of in-situ stress analyses conducted at the site (Ader and Springer, 1987;Springer and Ader, 1987). He is now working part time at WSU on a master's degree applying the COPLANEV programs to the Cajon Pass region to assess the local fracture sets developed in the drill site area, the San Gabriel Mountains to the west, and the San Bernardino Mountains to the east.…”

Section: Analysis Of the Continental Scientific Drilling Program Stud...mentioning

confidence: 99%

Geologic spatial analysis

Thiessen¹,

Eliason²

1989

View full text Add to dashboard Cite

This report was prepared as an account of work sponsored by an agency of the United States Government.Neither the United States Government nor any agency thereof, nor any of their employees, makes any warranty, express or implied, or assumes any legal liability or responsibility for the accuracy, completeness, or usefulness of any information, apparatus, product, or process disclosed, or represents that its use would not infringe privately owned rights. Reference herein to any specific commercial product, process, or service by trade name, trademark, manufacturer, or otherwise does not necessarily constitute or imply its endorsement, recommendation, or favoring by the United States Government or any agency thereof. The views and opinions of authors expressed herein do not necessarily state or reflect tht,se of the United States Government or any agency thereof. • iNTRODUCTIONThe Geologic Spatial Analysis (GSA) research program was initiated at Washington State University in 1987. This research program is funded by the U. S. Department of Energy's Office of Basic Energy Science (OBES). Basic research being conducted on GSA techniques is coordinated with a companion OBES program at DOE's Pacific Northwest Laboratory (PNL). The following performance report provides a brief overview of the status of the research and includes references to publications and presentations.Geologic spatial analysis research is focused on conducting comprehensive three-dimensional analysis of regions using geologic data sets that can be referenced by latitude, longitude and elevation/depth (Table 1). Based on these data, the GSA techniques determine the location and orientation of structural features in three-dimensional space in order to develop a regional geologic model for the user. This concept is based on, but far exceeds, classic structural analysis techniques which are more concerned with mapped patterns of lithologies and/or orientations of structures, and not their location in three-dimensions. These fundamental relationships are essential for exploration and development of energy resources, assessment of seismic risk, analysis of hydrologic systems, and regional basic geologic research. This rapidly expanding analysis technology is based on research initiated by Dr. Jay R. Eliason for analysis of crustal fractures using topography (COPLANEV) and seismically active fracture zones (COPLANEP); and Dr. Richard Thiessen for analysis of seismically active fractures (SEISPLN), lineament analysis system (LINEAMENT), and analysis of complex fold structures (REFOLD). These analyses techniques are ali based on utilization of digital analysis systems.

show abstract

In situ stress orientation near the San Andreas Fault: Preliminary results to 2.1 km depth from the Cajon Pass Scientific Drillhole

Shamir

Zoback

Barton

1988

Geophysical Research Letters

View full text Add to dashboard Cite

Stress‐induced wellbore breakouts were analyzed in the Cajon Pass Scientific Drillhole (4.3km NE of the San Andreas fault) to determine the orientation of the principal horizontal stresses, using borehole televiewer digitized data. In the depth interval 1750‐2115 m the mean orientation of the maximum horizontal stress is 073°. The scatter in the orientation of breakouts is as much as ±37°, and variations occur with wavelengths of few hundred meters in this interval, reflecting either true changes in stress orientation with depth or the variability of rock anisotropy. All the measured orientations, however, result in left‐lateral shear stress resolved onto planes parallel to the San Andreas fault, contrary to its post Miocene right‐lateral slip of ∼ 300 km. The stress orientation is consistent, however, with reported left lateral displacement across the Cleghorn fault (3 km northeast of, and possibly subparallel to the San Andreas near Cajon Pass) since the Pleistocene. The Cajon Pass stress orientation may reflect the current state of stress across the San Andreas fault, in which case it should change prior to right lateral slip on this fault, or a shallow local perturbation to the San Andreas stress field, in which case it should rotate couterclockwise with depth. Determination of the stress orientations at greater depths in the Cajon Pass drillhole will better sample the near field of the San Andreas fault and help resolve this question.

show abstract

In-situ stress project; Technical Report Number 2; Televiewer data report for the test interval 6250-6935 ft, Cajon Pass Well, California

Cited by 8 publications

References 7 publications

Geologic spatial analysis. 1988 performance report, August 30, 1987--January 30, 1989

Geologic spatial analysis. 1988 performance report, August 30, 1987--January 30, 1989

Geologic spatial analysis

In situ stress orientation near the San Andreas Fault: Preliminary results to 2.1 km depth from the Cajon Pass Scientific Drillhole

Contact Info

Product

Resources

About