Inversion and attribute-assisted hydraulically induced microseismic fracture characterization in the North Texas Barnett Shale

2011 ◽  
Vol 30 (3) ◽  
pp. 292-299 ◽  
Author(s):  
Xavier E. Refunjol ◽  
Kurt J. Marfurt ◽  
Joël H. Le Calvez
Keyword(s):  
Barnett Shale ◽  
North Texas ◽  
Fracture Characterization ◽  
The North

Integration of hydraulically induced microseismic event locations with active seismic attributes: A North Texas Barnett Shale case study

Geophysics ◽  
2012 ◽  
Vol 77 (3) ◽  
pp. KS1-KS12 ◽  
Author(s):  
Xavier E. Refunjol ◽  
Katie M. Keranen ◽  
Joël H. Le Calvez ◽  
Kurt J. Marfurt
Keyword(s):  
Mineralogical Composition ◽  
Seismic Attributes ◽  
Barnett Shale ◽  
Hydraulic Fractures ◽  
Fracture Networks ◽  
North Texas ◽  
Seismic Reflection Data ◽  
The North ◽  
Reflection Data ◽  
Microseismic Event

Hydraulic fractures are delineated by induced microseismic event distributions and typically propagate perpendicular to the regional minimum stress direction. However, at a smaller scale, varying mineralogical composition and existing fault and fracture networks can influence developing fracture networks. We integrated microseismic event locations with seismic attributes from multichannel seismic reflection data, including inversion results for impedance and Lamé parameters, and seismic curvature attributes. We found that microseismic event locations consistently correlate to zones of low seismic impedance and low [Formula: see text] and [Formula: see text] values, describing characteristic material properties of fracture-prone zones within the North Texas Lower and Upper Barnett Shale. Additionally, event locations showed a weak correlation with anticlinal structures as defined by volumetric curvature attributes. We suggest that the low impedance, low [Formula: see text] and [Formula: see text] zones were related to the boundary between calcite-filled fractures and the host rock.

scholarly journals 472. The Utility of Infectious Diseases E-consults in the Era of COVID-19

2020 ◽  
Vol 7 (Supplement_1) ◽  
pp. S302-S303
Author(s):  
Hala Saad ◽  
Kruti Yagnik ◽  
Helen King ◽  
Roger Bedimo ◽  
Richard J Medford
Keyword(s):  
Health Care ◽  
Infectious Diseases ◽  
Infection Prevention ◽  
Panel Member ◽  
University Hospital ◽  
North Texas ◽  
Review Panel ◽  
The North ◽  
Time To Completion ◽  
Texas Health

Abstract Background During the COVID-19 pandemic, rapid Infectious Diseases (ID) consultation has been required to answer novel questions regarding SARS-CoV-2 testing and infection prevention. We sought to evaluate the utility of e-consults to triage and provide rapid ID recommendations to providers. Methods We performed a retrospective study reviewing ID e-consults in three institutions in the North Texas region: Clements University Hospital (CUH), Parkland Hospital and Health System (PHHS), and the VA North Texas Health Care System (VA) from March 1, 2020 to May 15, 2020. Variables collected include age, sex, ethnicity, comorbidities, time to completion, reason for consult and outcome of consult (initiation or removal of personal protective equipment (PPE) and recommendation to test or retest for COVID-19). Results We performed all analysis using R studio (Version 1.3.959). Characteristics of 198 patients included: 112(57%) male, 86(43%) female, 86(43%) Caucasian, 71(36%) Hispanic, 42(21%) African American, 6(3%) Asian and mean(sd) age of 55.1(15.9). Patient comorbidities included: 89(45%) with a heart condition, 77(39%) diabetes, 30(15%) asthma and 14(7%) liver disease. Median time to completion for all hospitals was 4 hours(h); ((CUH (4h) vs PHHS (2h), p< 0.05; VA (5.5h) vs PHHS (2h) p< 0.05)). Most common reasons for e-consult included: (63)32% regarding re-testing ((CUH 14(21%) vs PHHS 43(50%), p< 0.05; CUH vs VA 14(27%), p< 0.05; PHHS vs VA, p< 0.05)), (61)31% testing ((CUH 25(37%) vs PHHS 39(45%), p< 0.05; CUH vs VA 7(16%), p< 0.05; PHHS vs VA, p< 0.05)) and 61(31%) infection prevention (IP). Based on the e-consult recommendation, 53(27%) of patients were tested ((CUH 31(45%) vs PHHS 11(13%), p< 0.05, CUH vs VA 11(25%), PHHS vs VA, p< 0.05)), 45(23%) were re-tested, 44(22%) of patients had PPE started on and 19% had PPE removed ((CUH 0(0%) vs PHHS 16(19%), p< 0.05; CUH vs VA 21(48%), p< 0.05; PHHS vs VA, p< 0.05)). Reason for Consult Conclusion E-consult services can provide prompt ID input during the COVID-19 pandemic, minimizing the risk of infection to the patient and health care workers while preserving PPE and testing supplies. Disclosures Roger Bedimo, MD, MS, Gilead Sciences (Consultant)Merck & Co. (Advisor or Review Panel member)ViiV Healthcare (Advisor or Review Panel member, Research Grant or Support)

scholarly journals Erratum to: The Strength of Family Ties: Perceptions of Network Relationship Quality and Levels of C-Reactive Proteins in the North Texas Heart Study

2015 ◽  
Vol 49 (5) ◽  
pp. 782-782
Author(s):  
Bert N. Uchino ◽  
John M. Ruiz ◽  
Timothy W. Smith ◽  
Joshua M. Smyth ◽  
Daniel J. Taylor ◽  
...  
Keyword(s):  
Relationship Quality ◽  
North Texas ◽  
Family Ties ◽  
The North ◽  
Heart Study ◽  
Network Relationship

Effects of Extensive Well Fracturing on a Waterflood Operation in the North Texas Strawn Sand

10.2118/407-g ◽  
1955 ◽  
Vol 204 (01) ◽  
pp. 16-21
Author(s):  
Gene E. Roark ◽  
J.D. Lindner
Keyword(s):  
North Texas ◽  
The North

New Cutter Technology Redefining PDC Durability Standards for Directional Control: North Texas/Barnett Shale

2010 ◽  
Author(s):  
Ryan Neil Baker ◽  
Yuelin Shen ◽  
John Zhang ◽  
Scott David Robertson
Keyword(s):  
Barnett Shale ◽  
North Texas ◽  
Directional Control

scholarly journals Exploring Disparities in Maternal Residential Proximity to Unconventional Gas Development in the Barnett Shale in North Texas

2019 ◽  
Vol 16 (3) ◽  
pp. 298
Author(s):  
Jennifer Ish ◽  
Elaine Symanski ◽  
Kristina Whitworth
Keyword(s):  
Low Income ◽  
White Women ◽  
Negative Binomial ◽  
Secondary Analysis ◽  
Negative Binomial Regression ◽  
Barnett Shale ◽  
North Texas ◽  
Unconventional Gas ◽  
Residential Proximity ◽  
Unconventional Gas Development

Background: This study explores sociodemographic disparities in residential proximity to unconventional gas development (UGD) among pregnant women. Methods: We conducted a secondary analysis using data from a retrospective birth cohort of 164,658 women with a live birth or fetal death from November 2010 to 2012 in the 24-county area comprising the Barnett Shale play, in North Texas. We considered both individual- and census tract-level indicators of sociodemographic status and computed Indexes of Concentration at the Extremes (ICE) to quantify relative neighborhood-level privilege/disadvantage. We used negative binomial regression to investigate the relation between these variables and the count of active UGD wells within 0.8 km of the home during gestation. We calculated count ratios (CR) and 95% confidence intervals (CI) to describe associations. Results: There were fewer wells located near homes of women of color living in low-income areas compared to non-Hispanic white women living in more privileged neighborhoods (ICE race/ethnicity + income: CR = 0.51, 95% CI = 0.48–0.55). Conclusions: While these results highlight a potential disparity in residential proximity to UGD in the Barnett Shale, they do not provide evidence of an environmental justice (EJ) issue nor negate findings of environmental injustice in other regions.

scholarly journals Development of Alternative Stabilization Methods for Transportation Infrastructure Based on Geopolymers

2019 ◽  
Vol 271 ◽  
pp. 02008
Author(s):  
Oscar D. Huang ◽  
Rinu Samuel ◽  
Aritra Banerjee ◽  
Anand J. Puppala ◽  
Miladin Radovic
Keyword(s):  
Unconfined Compressive Strength ◽  
Room Temperature ◽  
Soil Stabilization ◽  
Waste Materials ◽  
Chemical Additives ◽  
North Texas ◽  
Subgrade Soils ◽  
The North ◽  
Stabilization Methods ◽  
Dry Soil

Current soil stabilization methods are often limited by durability and leaching issues and do not always offer sustainable treatments. This research explores the use of geopolymers to stabilize clays in the North Texas area. In recent years, geopolymer has received much attention as an eco-friendly and sustainable alternative to conventional chemical additives, since it can be processed at room temperature from aqueous solutions by utilizing waste materials and/or abounded natural sources. Two subgrade soils from North Texas were treated with GP mix at a ratio of 8 wt% dry GP to dry soil. GP is shown to reduce swelling and shrinkage potential of soil considerably while an increase in unconfined compressive strength is observed as well. Therefore, further studies are recommended to understand the mechanism of GP and soil bonding resulting in said changes.

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