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Hydraulic fracturing

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https://www.readbyqxmd.com/read/28723084/mineral-reactions-in-shale-gas-reservoirs-barite-scale-formation-from-reusing-produced-water-as-hydraulic-fracturing-fluid
#1
Amelia N Paukert Vankeuren, J Alexandra Hakala, Karl Jarvis, Johnathan E Moore
Hydraulic fracturing for gas production is now ubiquitous in shale plays, but relatively little is known about shale-hydraulic fracturing fluid (HFF) reactions within the reservoir. To investigate reactions during the shut-in period of hydraulic fracturing, experiments were conducted flowing different HFFs through fractured Marcellus Shale cores at reservoir temperature and pressure (66(o)C, 20 MPa) for one week. Results indicate HFFs with hydrochloric acid cause substantial dissolution of carbonate minerals, as expected, increasing effective fracture volume (fracture volume + near-fracture matrix porosity) by 56-65%...
July 19, 2017: Environmental Science & Technology
https://www.readbyqxmd.com/read/28715172/a-spatiotemporal-industrial-activity-model-for-estimating-the-intensity-of-oil-and-gas-operations-in-colorado
#2
William B Allshouse, John L Adgate, Benjamin D Blair, Lisa M McKenzie
Oil and gas (O&G) production in the United States has increased in the last 15 years and operations, which are trending towards large multi-well pads, release hazardous air pollutants. Health studies have relied on proximity to O&G wells as an exposure metric, typically using an inverse distance weighting (IDW) approach. Since O&G emissions are dependent on multiple factors, a dynamic model is needed to describe the variability in air pollution emissions over space and time. We used information on Colorado O&G activities, production volumes, and air pollutant emission rates from two Colorado basins to create a spatiotemporal industrial activity model to develop an intensity-adjusted IDW well count metric...
July 17, 2017: Environmental Science & Technology
https://www.readbyqxmd.com/read/28714141/intrinsic-3d-prestressing-a-new-route-for-increasing-strength-and-improving-toughness-of-hybrid-inorganic-biocements
#3
Martha Schamel, Jake E Barralet, Michael Gelinsky, Jürgen Groll, Uwe Gbureck
Cement is the most consumed resource and is the most widely used material globally. The ability to extrinsically prestress cementitious materials with tendons usually made from steel allows the creation of high-strength bridges and floors from this otherwise brittle material. Here, a dual setting cement system based on the combination of hydraulic cement powder with an aqueous silk fibroin solution that intrinsically generates a 3D prestressing during setting, dramatically toughening the cement to the point it can be cut with scissors, is reported...
July 17, 2017: Advanced Materials
https://www.readbyqxmd.com/read/28710527/assessment-of-surface-water-contamination-from-coalbed-methane-fracturing-derived-volatile-contaminants-in-sullivan-county-indiana-usa
#4
Nicholas Meszaros, Bikram Subedi, Tristan Stamets, Naima Shifa
There is a growing concern over the contamination of surface water and the associated environmental and public health consequences from the recent proliferation of hydraulic fracturing in the USA. Petroleum hydrocarbon-derived contaminants of concern [benzene, toluene, ethylbenzene, and xylenes (BTEX)] and various dissolved cations and anions were spatially determined in surface waters around 15 coalbed methane fracking wells in Sullivan County, IN, USA. At least one BTEX compound was detected in 69% of sampling sites (n = 13) and 23% of sampling sites were found to be contaminated with all of the BTEX compounds...
July 14, 2017: Bulletin of Environmental Contamination and Toxicology
https://www.readbyqxmd.com/read/28699344/watershed-scale-impacts-from-surface-water-disposal-of-oil-and-gas-wastewater-in-western-pennsylvania
#5
William D Burgos, Luis Castillo-Meza, Travis L Tasker, Thomas J Geeza, Patrick J Drohan, Xiaofeng Liu, Joshua D Landis, Jens Blotevogel, Molly McLaughlin, Thomas Borch, Nathaniel R Warner
Combining horizontal drilling with high volume hydraulic fracturing has increased extraction of hydrocarbons from low-permeability oil and gas (O&G) formations across the United States; accompanied by increased wastewater production. Surface water discharges of O&G wastewater by centralized waste treatment (CWT) plants pose risks to aquatic and human health. We evaluated the impact of surface water disposal of O&G wastewater from CWT plants upstream of the Conemaugh River Lake (dam controlled reservoir) in western Pennsylvania...
July 12, 2017: Environmental Science & Technology
https://www.readbyqxmd.com/read/28697484/organic-compounds-in-hydraulic-fracturing-fluids-and-wastewaters-a-review
#6
REVIEW
Jenna L Luek, Michael Gonsior
High volume hydraulic fracturing (HVHF) of shale to stimulate the release of natural gas produces a large quantity of wastewater in the form of flowback fluids and produced water. These wastewaters are highly variable in their composition and contain a mixture of fracturing fluid additives, geogenic inorganic and organic substances, and transformation products. The qualitative and quantitative analyses of organic compounds identified in HVHF fluids, flowback fluids, and produced waters are reviewed here to communicate knowledge gaps that exist in the composition of HVHF wastewaters...
July 5, 2017: Water Research
https://www.readbyqxmd.com/read/28686682/a-road-damage-and-life-cycle-greenhouse-gas-comparison-of-trucking-and-pipeline-water-delivery-systems-for-hydraulically-fractured-oil-and-gas-field-development-in-colorado
#7
Ray C Duthu, Thomas H Bradley
The process of hydraulic fracturing for recovery of oil and natural gas uses large amounts of fresh water and produces a comparable amount of wastewater, much of which is typically transported by truck. Truck transport of water is an expensive and energy-intensive process with significant external costs including roads damages, and pollution. The integrated development plan (IDP) is the industry nomenclature for an integrated oil and gas infrastructure system incorporating pipeline-based transport of water and wastewater, centralized water treatment, and high rates of wastewater recycling...
2017: PloS One
https://www.readbyqxmd.com/read/28685163/sulfide-generation-by-dominant-halanaerobium-microorganisms-in-hydraulically-fractured-shales
#8
Anne E Booker, Mikayla A Borton, Rebecca A Daly, Susan A Welch, Carrie D Nicora, David W Hoyt, Travis Wilson, Samuel O Purvine, Richard A Wolfe, Shikha Sharma, Paula J Mouser, David R Cole, Mary S Lipton, Kelly C Wrighton, Michael J Wilkins
Hydraulic fracturing of black shale formations has greatly increased United States oil and natural gas recovery. However, the accumulation of biomass in subsurface reservoirs and pipelines is detrimental because of possible well souring, microbially induced corrosion, and pore clogging. Temporal sampling of produced fluids from a well in the Utica Shale revealed the dominance of Halanaerobium strains within the in situ microbial community and the potential for these microorganisms to catalyze thiosulfate-dependent sulfidogenesis...
July 2017: MSphere
https://www.readbyqxmd.com/read/28628868/an-overview-on-exploration-and-environmental-impact-of-unconventional-gas-sources-and-treatment-options-for-produced-water
#9
REVIEW
Tânia L S Silva, Sergio Morales-Torres, Sérgio Castro-Silva, José L Figueiredo, Adrián M T Silva
Rising global energy demands associated to unbalanced allocation of water resources highlight the importance of water management solutions for the gas industry. Advanced drilling, completion and stimulation techniques for gas extraction, allow more economical access to unconventional gas reserves. This stimulated a shale gas revolution, besides tight gas and coalbed methane, also causing escalating water handling challenges in order to avoid a major impact on the environment. Hydraulic fracturing allied to horizontal drilling is gaining higher relevance in the exploration of unconventional gas reserves, but a large amount of wastewater (known as "produced water") is generated...
June 16, 2017: Journal of Environmental Management
https://www.readbyqxmd.com/read/28613298/modelling-aqueous-solubility-of-sodium-chloride-in-clays-at-thermodynamic-conditions-of-hydraulic-fracturing-by-molecular-simulations
#10
Filip Moučka, Martin Svoboda, Martin Lísal
To address the high salinity of flow-back water during hydraulic fracturing, we have studied the equilibrium partitioning of NaCl and water between the bulk phase and clay pores. In shale rocks, such a partitioning can occur between fractures with a bulk-like phase and clay pores. We use an advanced Grand Canonical Monte Carlo (GCMC) technique based on fractional exchanges of dissolved ions and water molecules. We consider a typical shale gas reservoir condition of a temperature of 365 K and pressure of 275 bar, and we represent clay pores by pyrophyllite and Na-montmorillonite slits of a width ranging from about 7 to 28 Å, covering clay pores from dry clay to clay pores with a bulk-like layer in the middle of the pore...
June 28, 2017: Physical Chemistry Chemical Physics: PCCP
https://www.readbyqxmd.com/read/28603681/methane-emissions-from-the-marcellus-shale-in-southwestern-pennsylvania-and-northern-west-virginia-based-on-airborne-measurements
#11
Xinrong Ren, Dolly L Hall, Timothy Vinciguerra, Sarah E Benish, Phillip R Stratton, Doyeon Ahn, Jonathan R Hansford, Mark D Cohen, Sayantan Sahu, Hao He, Courtney Grimes, Ross J Salawitch, Sheryl H Ehrman, Russell R Dickerson
Natural gas production in the U.S. has increased rapidly over the past decade, along with concerns about methane (CH4) leakage (total fugitive emissions), and climate impacts. Quantification of CH4 emissions from oil and natural gas (O&NG) operations is important for establishing scientifically sound, cost-effective policies for mitigating greenhouse gases. We use aircraft measurements and a mass balance approach for three flight experiments in August and September 2015 to estimate CH4 emissions from O&NG operations in the southwestern Marcellus Shale region...
April 27, 2017: Journal of Geophysical Research. Atmospheres: JGR
https://www.readbyqxmd.com/read/28591666/characterization-of-the-chemicals-used-in-hydraulic-fracturing-fluids-for-wells-located-in-the-marcellus-shale-play
#12
Huan Chen, Kimberly E Carter
Hydraulic fracturing, coupled with the advances in horizontal drilling, has been used for recovering oil and natural gas from shale formations and has aided in increasing the production of these energy resources. The large volumes of hydraulic fracturing fluids used in this technology contain chemical additives, which may be toxic organics or produce toxic degradation byproducts. This paper investigated the chemicals introduced into the hydraulic fracturing fluids for completed wells located in Pennsylvania and West Virginia from data provided by the well operators...
June 4, 2017: Journal of Environmental Management
https://www.readbyqxmd.com/read/28588399/from-arteries-to-boreholes-steady-state-response-of-a-poroelastic-cylinder-to-fluid-injection
#13
L C Auton, C W MacMinn
The radially outward flow of fluid into a porous medium occurs in many practical problems, from transport across vascular walls to the pressurization of boreholes. As the driving pressure becomes non-negligible relative to the stiffness of the solid structure, the poromechanical coupling between the fluid and the solid has an increasingly strong impact on the flow. For very large pressures or very soft materials, as is the case for hydraulic fracturing and arterial flows, this coupling can lead to large deformations and, hence, to strong deviations from a classical, linear-poroelastic response...
May 2017: Proceedings. Mathematical, Physical, and Engineering Sciences
https://www.readbyqxmd.com/read/28575059/distribution-and-diversity-of-aquatic-macroinvertebrate-assemblages-in-a-semi-arid-region-earmarked-for-shale-gas-exploration-eastern-cape-karoo-south-africa
#14
Annah Mabidi, Matthew S Bird, Renzo Perissinotto
This study aims to investigate macroinvertebrate assemblage structure and composition across the three major waterbody types (temporary rivers, depression wetlands and semi-permanent dams) of the Eastern Cape Karoo, and to identify important environmental and spatial correlates of macroinvertebrate assemblage composition in the region. A total of 33 waterbodies (9 dams, 13 depression wetlands and 11 rivers) were sampled. Altogether, 91 taxa were recorded in November 2014 and 82 in April 2015. Twenty-seven taxa were common to all three waterbody types (across both sampling occasions), with 17 of these observed in November and 19 in April...
2017: PloS One
https://www.readbyqxmd.com/read/28574803/noise-characterization-of-oil-and-gas-operations
#15
Cameron Radtke, Daniel A Autenrieth, Tiffany Lipsey, William J Brazile
In cooperation with The Colorado Oil and Gas Conservation Commission, researchers at Colorado State University performed area noise monitoring at 23 oil and gas sites throughout Northern Colorado. The goals of this study were to: (1) measure and compare the noise levels for the different phases of oil and gas development sites; (2) evaluate the effectiveness of noise barriers; and (3) determine if noise levels exceeded the Colorado Oil and Gas Conservation Commission noise limits. The four phases of oil and gas development include drilling, hydraulic fracturing, completion and production...
June 2, 2017: Journal of Occupational and Environmental Hygiene
https://www.readbyqxmd.com/read/28558422/reflections-on-a-boom-perceptions-of-energy-development-impacts-in-the-bakken-oil-patch-inform-environmental-science-policy-priorities
#16
Devan Allen McGranahan, Felix N Fernando, Meghan L E Kirkwood
Ecosystems worldwide have been subject to new or intensified energy development facilitated by technologies such as horizontal drilling and hydraulic fracturing, activity that has generated concern for air, water, biotic, and social resources. Application of these technologies in the development of the Bakken oil patch has made it one of the most productive petroleum plays in North America, causing unprecedented landscape industrialization of otherwise rural, agricultural counties in western North Dakota. The region is isolated, and development impacts have not been well-studied...
December 1, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28549287/unconventional-energy-resources-in-a-crowded-subsurface-reducing-uncertainty-and-developing-a-separation-zone-concept-for-resource-estimation-and-deep-3d-subsurface-planning-using-legacy-mining-data
#17
Alison A Monaghan
Over significant areas of the UK and western Europe, anthropogenic alteration of the subsurface by mining of coal has occurred beneath highly populated areas which are now considering a multiplicity of 'low carbon' unconventional energy resources including shale gas and oil, coal bed methane, geothermal energy and energy storage. To enable decision making on the 3D planning, licensing and extraction of these resources requires reduced uncertainty around complex geology and hydrogeological and geomechanical processes...
May 23, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28493306/decisions-on-hydraulic-fracturing-must-be-science-based
#18
EDITORIAL
Jean-Philippe Nicot
No abstract text is available yet for this article.
July 2017: Ground Water
https://www.readbyqxmd.com/read/28482653/hydrogeochemical-and-isotopic-indicators-of-hydraulic-fracturing-flowback-fluids-in-shallow-groundwater-and-stream-water-derived-from-dameigou-shale-gas-extraction-in-the-northern-qaidam-basin
#19
Zhaoxian Zheng, Hongda Zhang, Zongyu Chen, Xufeng Li, Pucheng Zhu, Xiaoshun Cui
Most of the shale gas production in northwest China is from continental shale. Identifying hydrogeochemical and isotopic indicators of toxic hydraulic fracturing flowback fluids (HFFF) has great significance in assessing the safety of drinking water from shallow groundwater and streamwater. Hydrogeochemical and isotopic data for HFFF from the Dameigou shale formations (Cl/Br ratio (1.81 × 10(-4)-6.52 × 10(-4)), Ba/Sr (>0.2), δ(11)B (-10-1‰), and ε(SW)Sr (56-65, where ε(SW)Sr is the deviation of the (87)Sr/(86)Sr ratio from that of seawater in parts per 10(4))) were distinct from data for the background saline shallow groundwater and streamwater before fracturing...
June 6, 2017: Environmental Science & Technology
https://www.readbyqxmd.com/read/28469616/guar-gum-stimulates-biogenic-sulfide-production-at-elevated-pressures-implications-for-shale-gas-extraction
#20
Sophie L Nixon, Leanne Walker, Matthew D T Streets, Bob Eden, Christopher Boothman, Kevin G Taylor, Jonathan R Lloyd
Biogenic sulfide production is a common problem in the oil industry, and can lead to costly hydrocarbon processing and corrosion of extraction infrastructure. The same phenomenon has recently been identified in shale gas extraction by hydraulic fracturing, and organic additives in fracturing fluid have been hypothesized to stimulate this process. Constraining the relative effects of the numerous organic additives on microbial metabolism in situ is, however, extremely challenging. Using a bespoke bioreactor system we sought to assess the potential for guar gum, the most commonly used gelling agent in fracturing fluids, to stimulate biogenic sulfide production by sulfate-reducing microorganisms at elevated pressure...
2017: Frontiers in Microbiology
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