keyword
MENU ▼
Read by QxMD icon Read
search

Hydraulic fracturing

keyword
https://www.readbyqxmd.com/read/28329412/measuring-flow-rate-in-crystalline-bedrock-wells-using-the-dissolved-oxygen-alteration-method
#1
Sarah A Vitale, Gary A Robbins
Determination of vertical flow rates in a fractured bedrock well can aid in planning and implementing hydraulic tests, water quality sampling, and improving interpretations of water quality data. Although flowmeters are highly accurate in flow rate measurement, the high cost and logistics may be limiting. In this study the dissolved oxygen alteration method (DOAM) is expanded upon as a low-cost alternative to determine vertical flow rates in crystalline bedrock wells. The method entails altering the dissolved oxygen content in the wellbore through bubbler aeration, and monitoring the vertical advective movement of the dissolved oxygen over time...
March 22, 2017: Ground Water
https://www.readbyqxmd.com/read/28306517/biomechanical-analysis-of-stiffness-and-fracture-displacement-after-using-pmma-augmented-sacroiliac-screw-fixation-for-sacrum-fractures
#2
Andreas Höch, Richard Schimpf, Niels Hammer, Stefan Schleifenbaum, Michael Werner, Christoph Josten, Jörg Böhme
Cement augmentation of pedicle screws is the gold standard for the stabilization of osteoporotic fractures of the spine. In-screw cement augmentation, in which cement is injected through the cannula, is another option for fracture stabilization of fragility fractures of the sacrum. However, biomechanical superiority of this technique compared to conventional sacroiliac screw fixation has not been tested. The present study compares the stability of cement-augmented and non-cement-augmented sacroiliac screw fixation in osteoporotic sacrum fractures under cyclic loading...
March 15, 2017: Biomedizinische Technik. Biomedical Engineering
https://www.readbyqxmd.com/read/28302780/draft-genome-sequence-of-pseudomonas-sp-bdal1-reconstructed-from-a-bakken-shale-hydraulic-fracturing-produced-water-storage-tank-metagenome
#3
Daniel Lipus, Daniel Ross, Kyle Bibby, Djuna Gulliver
We report the 5,425,832 bp draft genome of Pseudomonas sp. strain BDAL1, recovered from a Bakken shale hydraulic fracturing-produced water tank metagenome. Genome annotation revealed several key biofilm formation genes and osmotic stress response mechanisms necessary for survival in hydraulic fracturing-produced water.
March 16, 2017: Genome Announcements
https://www.readbyqxmd.com/read/28284138/perceived-risks-of-produced-water-management-and-naturally-occurring-radioactive-material-content-in-north-dakota
#4
Luisa Torres, Om Prakash Yadav, Eakalak Khan
Unconventional oil and gas development using hydraulic fracturing has caused conflict and controversy across the globe including the U.S. where some States banned the practice. Nevertheless, North Dakota (ND) has supported the practice because the State perceives the risks to be acceptable and because it has brought growth and opportunities to small communities. However, social acceptance of new technology is based on a number of factors and not contingent on economic benefits. To date, no research has been conducted to understand public risk perception of hazards associated with produced water from hydraulic fracturing in ND...
March 8, 2017: Journal of Environmental Management
https://www.readbyqxmd.com/read/28278314/biomechanic-factors-associated-with-orbital-floor-fractures
#5
Sagar Patel, Christopher Andrecovich, Michael Silverman, Liying Zhang, Mahdii Shkoukani
Importance: Orbital floor fractures are commonly seen in clinical practice, yet the etiology underlying the mechanism of fracture is not well understood. Current research focuses on the buckling theory and hydraulic theory, which implicate trauma to the orbital rim and the globe, respectively. Objective: To elucidate and define the biomechanical factors involved in an orbital floor fracture. Design, Setting, and Participants: A total of 10 orbits from 5 heads (3 male and 2 female) were used for this study...
March 9, 2017: JAMA Facial Plastic Surgery
https://www.readbyqxmd.com/read/28273951/vein-networks-in-hydrothermal-systems-provide-constraints-for-the-monitoring-of-active-volcanoes
#6
Luigi Cucci, Francesca Di Luccio, Alessandra Esposito, Guido Ventura
Vein networks affect the hydrothermal systems of many volcanoes, and variations in their arrangement may precede hydrothermal and volcanic eruptions. However, the long-term evolution of vein networks is often unknown because data are lacking. We analyze two gypsum-filled vein networks affecting the hydrothermal field of the active Lipari volcanic Island (Italy) to reconstruct the dynamics of the hydrothermal processes. The older network (E1) consists of sub-vertical, N-S striking veins; the younger network (E2) consists of veins without a preferred strike and dip...
December 2017: Scientific Reports
https://www.readbyqxmd.com/read/28273539/nanoscale-zero-valent-iron-for-metal-metalloid-removal-from-model-hydraulic-fracturing-wastewater
#7
Yuqing Sun, Cheng Lei, Eakalak Khan, Season S Chen, Daniel C W Tsang, Yong Sik Ok, Daohui Lin, Yujie Feng, Xiang-Dong Li
Nanoscale zero-valent iron (nZVI) was tested for the removal of Cu(II), Zn(II), Cr(VI), and As(V) in model saline wastewaters from hydraulic fracturing. Increasing ionic strength (I) from 0.35 to 4.10 M (Day-1 to Day-90 wastewaters) increased Cu(II) removal (25.4-80.0%), inhibited Zn(II) removal (58.7-42.9%), slightly increased and then reduced Cr(VI) removal (65.7-44.1%), and almost unaffected As(V) removal (66.7-75.1%) by 8-h reaction with nZVI at 1-2 g L(-1). The removal kinetics conformed to pseudo-second-order model, and increasing I decreased the surface area-normalized rate coefficient (ksa) of Cu(II) and Cr(VI), probably because agglomeration of nZVI in saline wastewaters restricted diffusion of metal(loid)s to active surface sites...
February 27, 2017: Chemosphere
https://www.readbyqxmd.com/read/28258287/-trisegmental-fusion-by-vertebral-body-replacement-outcome-following-traumatic-multisegmental-fractures-of-the-thoracic-and-lumbar-spine
#8
Michael Kreinest, Dorothee Schmahl, Paul A Grützner, Stefan Matschke
BACKGROUND: Around 5% of all trauma patients suffer from spinal trauma. Spinal fractures are mainly located in the thoracic and lumbar spine. For multisegmental vertebral fractures categorized as instable, combined dorsal instrumentation and ventral stabilization is recommended. Numerous vertebral body replacement systems are available for ventral stabilization. OBJECTIVES: The aim of the current study was to analyze radiological results following the implantation of a hydraulic expandable vertebral body replacement and the evaluation of patients' outcome three years after implantation...
March 3, 2017: Der Unfallchirurg
https://www.readbyqxmd.com/read/28248422/methane-occurrences-in-aquifers-overlying-the-barnett-shale-play-with-a-focus-on-parker-county-texas
#9
Jean-Philippe Nicot, Patrick Mickler, Toti Larson, M Clara Castro, Roxana Darvari, Kristine Uhlman, Ruth Costley
Clusters of elevated methane concentrations in aquifers overlying the Barnett Shale play have been the focus of recent national attention as they relate to impacts of hydraulic fracturing. The objective of this study was to assess the spatial extent of high dissolved methane previously observed on the western edge of the play (Parker County) and to evaluate its most likely source. A total of 509 well water samples from 12 counties (14,500 km(2) ) were analyzed for methane, major ions, and carbon isotopes. Most samples were collected from the regional Trinity Aquifer and show only low levels of dissolved methane (85% of 457 unique locations <0...
March 1, 2017: Ground Water
https://www.readbyqxmd.com/read/28238366/modeling-potential-occupational-inhalation-exposures-and-associated-risks-of-toxic-organics-from-chemical-storage-tanks-used-in-hydraulic-fracturing-using-aermod
#10
Huan Chen, Kimberly E Carter
Various toxic chemicals used in hydraulic fracturing fluids may influence the inherent health risks associated with these operations. This study investigated the possible occupational inhalation exposures and potential risks related to the volatile organic compounds (VOCs) from chemical storage tanks and flowback pits used in hydraulic fracturing. Potential risks were evaluated based on radial distances between 5 m and 180 m from the wells for 23 contaminants with known inhalation reference concentration (RfC) or inhalation unit risks (IUR)...
February 18, 2017: Environmental Pollution
https://www.readbyqxmd.com/read/28229951/chemical-and-toxicological-characterizations-of-hydraulic-fracturing-flowback-and-produced-water
#11
Yuhe He, Shannon L Flynn, Erik J Folkerts, Yifeng Zhang, Dongliang Ruan, Daniel S Alessi, Jonathan W Martin, Greg G Goss
Hydraulic fracturing (HF) has emerged as a major method of unconventional oil and gas recovery. The toxicity of hydraulic fracturing flowback and produced water (HF-FPW) has not been previously reported and is complicated by the combined complexity of organic and inorganic constituents in HF fluids and deep formation water. In this study, we characterized the solids, salts, and organic signatures in an HF-FPW sample from the Duvernay Formation, Alberta, Canada. Untargeted HPLC-Orbitrap revealed numerous unknown dissolved polar organics...
February 14, 2017: Water Research
https://www.readbyqxmd.com/read/28220696/unconventional-oil-and-gas-spills-risks-mitigation-priorities-and-state-reporting-requirements
#12
Lauren A Patterson, Katherine E Konschnik, Hannah Wiseman, Joseph Fargione, Kelly O Maloney, Joseph Kiesecker, Jean-Philippe Nicot, Sharon Baruch-Mordo, Sally Entrekin, Anne Trainor, James E Saiers
Rapid growth in unconventional oil and gas (UOG) has produced jobs, revenue, and energy, but also concerns over spills and environmental risks. We assessed spill data from 2005 to 2014 at 31 481 UOG wells in Colorado, New Mexico, North Dakota, and Pennsylvania. We found 2-16% of wells reported a spill each year. Median spill volumes ranged from 0.5 m(3) in Pennsylvania to 4.9 m(3) in New Mexico; the largest spills exceeded 100 m(3). Seventy-five to 94% of spills occurred within the first three years of well life when wells were drilled, completed, and had their largest production volumes...
February 21, 2017: Environmental Science & Technology
https://www.readbyqxmd.com/read/28213127/quantitation-of-lead-210-210-pb-using-lead-203-203-pb-as-a-massless-yield-tracer
#13
D May, A N Nelson, M K Schultz
Determination of Pb-210 ((210)Pb) in aqueous solution is a common radioanalytical challenge in environmental science. Widely used methods for undertaking these analyses (e.g., ASTM D7535) rely on the use of stable lead (Pb) as a yield tracer that takes into account losses of (210)Pb that inevitably occur during elemental/radiochemical separations of the procedures. Although effective, these methods introduce technical challenges that can be difficult to track and potentially introduce uncertainty that can be difficult to quantify...
February 14, 2017: Journal of Environmental Radioactivity
https://www.readbyqxmd.com/read/28159795/predominance-and-metabolic-potential-of-halanaerobium-in-produced-water-from-hydraulically-fractured-marcellus-shale-wells
#14
Daniel Lipus, Amit Vikram, Daniel Ross, Daniel Bain, Djuna Gulliver, Richard Hammack, Kyle Bibby
Microbial activity in the produced water from hydraulically fractured oil and gas wells may potentially interfere with hydrocarbon production and cause damage to the well and surface infrastructure via corrosion, sulfide release, and fouling. In this study, we surveyed the microbial abundance and community structure of produced water sampled from 42 Marcellus Shale wells in southwestern Pennsylvania (well age ranged from 150 to 1846 days) to better understand the microbial diversity of produced water. We sequenced the V4 region of the 16S rRNA gene to assess taxonomy and utilized qPCR to evaluate the microbial abundance across all 42 produced water samples...
February 3, 2017: Applied and Environmental Microbiology
https://www.readbyqxmd.com/read/28140571/sublethal-and-reproductive-effects-of-acute-and-chronic-exposure-to-flowback-and-produced-water-from-hydraulic-fracturing-on-the-water-flea-daphnia-magna
#15
Tamzin A Blewett, Perrine L M Delompré, Yuhe He, Erik J Folkerts, Shannon L Flynn, Daniel S Alessi, Greg G Goss
Hydraulic fracturing is an industrial process allowing for the extraction of gas or oil. To fracture the rocks, a proprietary mix of chemicals is injected under high pressure, which later returns to the surface as flowback and produced water (FPW). FPW is a complex chemical mixture consisting of trace metals, organic compounds, and often, high levels of salts. FPW toxicity to the model freshwater crustacean Daphnia magna was characterized utilizing acute (48 h median lethal concentrations; LC50) and chronic (21 day) exposures...
February 13, 2017: Environmental Science & Technology
https://www.readbyqxmd.com/read/28122672/insights-into-the-subsurface-transport-of-as-v-and-se-vi-in-produced-water-from-hydraulic-fracturing-using-soil-samples-from-qingshankou-formation-songliao-basin-china
#16
Season S Chen, Yuqing Sun, Daniel C W Tsang, Nigel J D Graham, Yong Sik Ok, Yujie Feng, Xiang-Dong Li
Produced water is a type of wastewater generated from hydraulic fracturing, which may pose a risk to the environment and humans due to its high ionic strength and the presence of elevated concentrations of metals/metalloids that exceed maximum contamination levels. The mobilization of As(V) and Se(VI) in produced water and selected soils from Qingshankou Formation in the Songliao Basin in China were investigated using column experiments and synthetic produced water whose quality was representative of waters arising at different times after well creation...
April 2017: Environmental Pollution
https://www.readbyqxmd.com/read/28119794/the-oblique-metaphyseal-shortening-osteotomy-of-the-distal-ulna-surgical-technique-and-results-of-ten-patients
#17
Szabolcs Benis, Jean F Goubau, Koen Mermuys, Petrus Van Hoonacker, Bart Berghs, Diederick Kerckhove, Bert Vanmierlo
Background Ulnocarpal abutment is a common condition following distal radius fractures. There are different surgical methods of treatment for this pathology: open and arthroscopic wafer procedure or an ulnar shortening osteotomy. We describe an oblique metaphyseal shortening osteotomy of the distal ulna using two cannulated headless compression screws. We report the results of 10 patients treated with this method. Materials and Methods Out of 17 patients, 10 could be reviewed retrospectively for this study...
February 2017: Journal of Wrist Surgery
https://www.readbyqxmd.com/read/28105596/monitoring-nutrients-fate-after-digestate-spreading-in-a-short-rotation-buffer-area
#18
Nicolò Colombani, Bruno Boz, Bruna Gumiero, Micòl Mastrocicco
One of the main sources of reactive nitrogen pollution is animal manure. The disposal of digestate (material remaining after the anaerobic digestion of a biodegradable feedstock) in agricultural soils could solve both the problems of soil fertilization and waste removal, but the fate of digestate in the environment must be assessed carefully before its massive utilization. To investigate whether digestate could be safely employed as a soil fertilizer, an agricultural field located in Monastier di Treviso (Northern Italy) and characterized by the presence of low hydraulic conductivity clay soils, was selected to be amended with bovine digestate...
January 20, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28102897/controls-on-methane-occurrences-in-shallow-aquifers-overlying-the-haynesville-shale-gas-field-east-texas
#19
Jean-Philippe Nicot, Toti Larson, Roxana Darvari, Patrick Mickler, Michael Slotten, Jordan Aldridge, Kristine Uhlman, Ruth Costley
Understanding the source of dissolved methane in drinking-water aquifers is critical for assessing potential contributions from hydraulic fracturing in shale plays. Shallow groundwater in the Texas portion of the Haynesville Shale area (13,000 km(2) ) was sampled (70 samples) for methane and other dissolved light alkanes. Most samples were derived from the fresh water bearing Wilcox formations and show little methane except in a localized cluster of 12 water wells (17% of total) in a approximately 30 × 30 km(2) area in Southern Panola County with dissolved methane concentrations less than 10 mg/L...
January 19, 2017: Ground Water
https://www.readbyqxmd.com/read/28091599/a-comprehensive-numerical-model-for-simulating-fluid-transport-in-nanopores
#20
Yuan Zhang, Wei Yu, Kamy Sepehrnoori, Yuan Di
Since a large amount of nanopores exist in tight oil reservoirs, fluid transport in nanopores is complex due to large capillary pressure. Recent studies only focus on the effect of nanopore confinement on single-well performance with simple planar fractures in tight oil reservoirs. Its impacts on multi-well performance with complex fracture geometries have not been reported. In this study, a numerical model was developed to investigate the effect of confined phase behavior on cumulative oil and gas production of four horizontal wells with different fracture geometries...
January 16, 2017: Scientific Reports
keyword
keyword
37991
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"