Resource Type

Reservoir fracture mapping using microearthquakes: Austin chalk, Giddings field, TX and 76 field, Clinton Co., KY (open access)

Reservoir fracture mapping using microearthquakes: Austin chalk, Giddings field, TX and 76 field, Clinton Co., KY

Patterns of microearthquakes detected downhole defined fracture orientation and extent in the Austin chalk, Giddings field, TX and the 76 field, Clinton Co., KY. We collected over 480 and 770 microearthquakes during hydraulic stimulation at two sites in the Austin chalk, and over 3200 during primary production in Clinton Co. Data were of high enough quality that 20%, 31% and 53% of the events could be located, respectively. Reflected waves constrained microearthquakes to the stimulated depths at the base of the Austin chalk. In plan view, microearthquakes defined elongate fracture zones extending from the stimulation wells parallel to the regional fracture trend. However, widths of the stimulated zones differed by a factor of five between the two Austin chalk sites, indicating a large difference in the population of ancillary fractures. Post-stimulation production was much higher from the wider zone. At Clinton Co., microearthquakes defined low-angle, reverse-fault fracture zones above and below a producing zone. Associations with depleted production intervals indicated the mapped fractures had been previously drained. Drilling showed that the fractures currently contain brine. The seismic behavior was consistent with poroelastic models that predicted slight increases in compressive stress above and below the drained volume.
Date: November 1, 1996
Creator: Phillips, W. S.; Rutledge, J. T.; Gardner, T. L.; Fairbanks, T. D.; Miller, M. E. & Schuessler, B. K.
System: The UNT Digital Library
[Clipping: 'Our Daring Young Women': WWII role models guide women pilots] (open access)

[Clipping: 'Our Daring Young Women': WWII role models guide women pilots]

Photocopy of an clipping on the legacy of Women Airforce Service Pilots, their contributions to World War II, and their eventual fight to gain veteran status.
Date: November 1984
Creator: Watson, Liz
System: The Portal to Texas History
[The military's crumbling gay ban: the year in review] (open access)

[The military's crumbling gay ban: the year in review]

A copy of a newspaper article pertaining to the military's anti-gay and lesbian servicemen policies and how the policies have been challenged by the Lambda Legal Defense and Education Fund.
Date: November 18, 1992
Creator: unknown
System: The UNT Digital Library
[Fax from Lambda Legal Defense to the Dallas Voice] (open access)

[Fax from Lambda Legal Defense to the Dallas Voice]

Fax from Lambda Legal Defense to the Dallas Voice of an article, "The Military's Crumbling Gay Ban: The Year in Review."
Date: November 18, 1992
Creator: unknown
System: The UNT Digital Library
Habitat Quantity of Red-Cockaded Woodpecker Picoides Borealis (Aves: Piciformes: Picidae) in its Former Historic Landscape Near the Big Thicket Naitonal Preserve, Texas, USA (open access)

Habitat Quantity of Red-Cockaded Woodpecker Picoides Borealis (Aves: Piciformes: Picidae) in its Former Historic Landscape Near the Big Thicket Naitonal Preserve, Texas, USA

This article quantifies pine-forested habitat suitable for Red-cockaded Woodpecker in the former historic range of the species to assess the potential for possible re-colonization.
Date: January 26, 2016
Creator: Thapa, Vivek & Acevedo, Miguel F.
System: The UNT Digital Library
Roster of registered Architects (open access)

Roster of registered Architects

This report includes the Roster of registered Architects as of October 1980.
Date: October 1980
Creator: Texas Board of Architectural Examiners
System: The Portal to Texas History
Tornado:The voice of the people in disaster and after (open access)

Tornado:The voice of the people in disaster and after

This report provides information about the tornado damages , history of Lubbock and how the community responded to the Tornado.
Date: September 1971
Creator: Texas Tech University
System: The Portal to Texas History