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Found 18 results.

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SAFOD Main Hole downhole logging data phase 1.1

SAFOD is motivated by the need to answer fundamental questions about the physical and chemical processes controlling faulting and earthquake generation within a major plate-bounding fault. SAFOD will drill and instrument an inclined borehole across the San Andreas Fault Zone to a depth of 3.2 km, targeting a repeating microearthquake source. The drill site is located west of the vertical San Andreas Fault on a segment of the fault that moves through a combination of aseismic creep and repeating microearthquakes. It lies at the extreme northern end of the rupture zone of the 1966, Magnitude 6 Parkfield earthquake, the most recent in a series of events that have ruptured the fault five times since 1857. The Parkfield region is the most comprehensively instrumented section of a fault anywhere in the world, and has been the focus of intensive study for the past two decades. This data set contains open hole geophysical wireline logging data from 591-1447m (rel. to rig floor, 9,45m abv gnd)

Gamma Log for HSDP-2-A on 4. July 1999

The target of this study is to correlate the logging data with the lithological and structural characteristics of the drilled volcanic sequences; in particular to extract information which are important to better understand alteration processes as well as the hydrogeological and hydrogeochemical situation. The specific targets of this study are: core-log comparisons and detailed reconstruction of the lithological profile with individual lithological units , evaluation of the BHTV data with regard to stereoscopic analysis of structural elements, calculation of porosity profiles using resistivity and sonic logs, determination of variations of petrophysical in-situ parameter with depth(increasing age); in particular mapping the distribution and extent of alteration and possible fluid path way zones. All log analysis will be closely correlated with petrographical and geochemical core analysis.

Gamma Log for HSDP-2-A on 5. December 1999

The target of this study is to correlate the logging data with the lithological and structural characteristics of the drilled volcanic sequences; in particular to extract information which are important to better understand alteration processes as well as the hydrogeological and hydrogeochemical situation. The specific targets of this study are: core-log comparisons and detailed reconstruction of the lithological profile with individual lithological units , evaluation of the BHTV data with regard to stereoscopic analysis of structural elements, calculation of porosity profiles using resistivity and sonic logs, determination of variations of petrophysical in-situ parameter with depth(increasing age); in particular mapping the distribution and extent of alteration and possible fluid path way zones. All log analysis will be closely correlated with petrographical and geochemical core analysis.

SAFOD Main Hole downhole logging data phase 1.2 1556-1744m

SAFOD is motivated by the need to answer fundamental questions about the physical and chemical processes controlling faulting and earthquake generation within a major plate-bounding fault. SAFOD will drill and instrument an inclined borehole across the San Andreas Fault Zone to a depth of 3.2 km, targeting a repeating microearthquake source. The drill site is located west of the vertical San Andreas Fault on a segment of the fault that moves through a combination of aseismic creep and repeating microearthquakes. It lies at the extreme northern end of the rupture zone of the 1966, Magnitude 6 Parkfield earthquake, the most recent in a series of events that have ruptured the fault five times since 1857. The Parkfield region is the most comprehensively instrumented section of a fault anywhere in the world, and has been the focus of intensive study for the past two decades. This data set contains open hole geophysical wireline logging data from 1556-1744m (rel. to rig floor, 9,45m abv gnd)

SAFOD Main Hole downhole logging data phase 1.2 1744-1932m

SAFOD is motivated by the need to answer fundamental questions about the physical and chemical processes controlling faulting and earthquake generation within a major plate-bounding fault. SAFOD will drill and instrument an inclined borehole across the San Andreas Fault Zone to a depth of 3.2 km, targeting a repeating microearthquake source. The drill site is located west of the vertical San Andreas Fault on a segment of the fault that moves through a combination of aseismic creep and repeating microearthquakes. It lies at the extreme northern end of the rupture zone of the 1966, Magnitude 6 Parkfield earthquake, the most recent in a series of events that have ruptured the fault five times since 1857. The Parkfield region is the most comprehensively instrumented section of a fault anywhere in the world, and has been the focus of intensive study for the past two decades. This data set contains open hole geophysical wireline logging data from 1744-1932m (rel. to rig floor, 9,45m abv gnd)

Gamma Log for HSDP-2-A on 5. December 1999 (environmentally corrected)

The target of this study is to correlate the logging data with the lithological and structural characteristics of the drilled volcanic sequences; in particular to extract information which are important to better understand alteration processes as well as the hydrogeological and hydrogeochemical situation. The specific targets of this study are: core-log comparisons and detailed reconstruction of the lithological profile with individual lithological units , evaluation of the BHTV data with regard to stereoscopic analysis of structural elements, calculation of porosity profiles using resistivity and sonic logs, determination of variations of petrophysical in-situ parameter with depth(increasing age); in particular mapping the distribution and extent of alteration and possible fluid path way zones. All log analysis will be closely correlated with petrographical and geochemical core analysis.

Gamma Log for HSDP-2-A on 4. July 1999 (environmentally corrected)

The target of this study is to correlate the logging data with the lithological and structural characteristics of the drilled volcanic sequences; in particular to extract information which are important to better understand alteration processes as well as the hydrogeological and hydrogeochemical situation. The specific targets of this study are: core-log comparisons and detailed reconstruction of the lithological profile with individual lithological units , evaluation of the BHTV data with regard to stereoscopic analysis of structural elements, calculation of porosity profiles using resistivity and sonic logs, determination of variations of petrophysical in-situ parameter with depth(increasing age); in particular mapping the distribution and extent of alteration and possible fluid path way zones. All log analysis will be closely correlated with petrographical and geochemical core analysis.

SAFOD Main Hole downhole logging data phase 2 (2005), 2975-3387m

SAFOD is motivated by the need to answer fundamental questions about the physical and chemical processes controlling faulting and earthquake generation within a major plate-bounding fault. SAFOD will drill and instrument an inclined borehole across the San Andreas Fault Zone to a depth of 3.2 km, targeting a repeating microearthquake source. The drill site is located west of the vertical San Andreas Fault on a segment of the fault that moves through a combination of aseismic creep and repeating microearthquakes. It lies at the extreme northern end of the rupture zone of the 1966, Magnitude 6 Parkfield earthquake, the most recent in a series of events that have ruptured the fault five times since 1857. The Parkfield region is the most comprehensively instrumented section of a fault anywhere in the world, and has been the focus of intensive study for the past two decades. This data set contains open hole geophysical wireline logging data from 2975-3387m (rel. to rig floor, 9,45m abv gnd)

SAFOD Main Hole downhole logging data phase 2 (2005), 3799-3987m

SAFOD is motivated by the need to answer fundamental questions about the physical and chemical processes controlling faulting and earthquake generation within a major plate-bounding fault. SAFOD will drill and instrument an inclined borehole across the San Andreas Fault Zone to a depth of 3.2 km, targeting a repeating microearthquake source. The drill site is located west of the vertical San Andreas Fault on a segment of the fault that moves through a combination of aseismic creep and repeating microearthquakes. It lies at the extreme northern end of the rupture zone of the 1966, Magnitude 6 Parkfield earthquake, the most recent in a series of events that have ruptured the fault five times since 1857. The Parkfield region is the most comprehensively instrumented section of a fault anywhere in the world, and has been the focus of intensive study for the past two decades. This data set contains open hole geophysical wireline logging data from 3799-3987m (rel. to rig floor, 9,45m abv gnd)

SAFOD Main Hole downhole logging data phase 2 (2005), 3387-3799m

SAFOD is motivated by the need to answer fundamental questions about the physical and chemical processes controlling faulting and earthquake generation within a major plate-bounding fault. SAFOD will drill and instrument an inclined borehole across the San Andreas Fault Zone to a depth of 3.2 km, targeting a repeating microearthquake source. The drill site is located west of the vertical San Andreas Fault on a segment of the fault that moves through a combination of aseismic creep and repeating microearthquakes. It lies at the extreme northern end of the rupture zone of the 1966, Magnitude 6 Parkfield earthquake, the most recent in a series of events that have ruptured the fault five times since 1857. The Parkfield region is the most comprehensively instrumented section of a fault anywhere in the world, and has been the focus of intensive study for the past two decades. This data set contains open hole geophysical wireline logging data from 3387-3799m (rel. to rig floor, 9,45m abv gnd)

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