Advertisement

Topics

Exploring How to Use Groundwater Chemistry to Identify Migration of Methane near Shale Gas Wells in the Appalachian Basin.

08:00 EDT 12th July 2019 | BioPortfolio

Summary of "Exploring How to Use Groundwater Chemistry to Identify Migration of Methane near Shale Gas Wells in the Appalachian Basin."

Methane (CH) enters waters in hydrocarbon-rich basins because of natural processes and problems related to oil and gas wells. As a redox-active greenhouse gas, CH degrades water or emits to the atmosphere and contributes to climate change. To detect if methane migrated from hydrocarbon wells (i.e., anomalous methane), we examined 20 751 methane-containing groundwaters from the Upper Appalachian Basin (AB). We looked for concentrations (mg/L) that indicated AB brine salts (chloride concentrations ([Cl]) > 30; [Ca]/[Na] < 0.52) to detect natural methane, and we looked for concentrations of redox-active species ([SO] ≥ 6; [Fe] ≥ 0.3) to detect anomalous methane. These indicators highlight natural contamination by methane-containing brines or recent onset of microbial oxidation of methane coupled to iron- or sulfate-reduction. We hypothesized that only waters recently contaminated by methane still exhibit high iron and sulfate concentrations. Of the AB samples, 17 (0.08%) from 12 sites indicated potential contamination. All were located in areas with high densities of shale-gas or conventional oil/gas wells. In contrast, in southwestern Pennsylvania where brines are shallow and coal, oil, and gas all have been extracted extensively, no sites of recent methane migration were detectable. Such indicators may help screen for contamination in some areas even without predrill measurements.

Affiliation

Journal Details

This article was published in the following journal.

Name: Environmental science & technology
ISSN: 1520-5851
Pages:

Links

DeepDyve research library

PubMed Articles [15216 Associated PubMed Articles listed on BioPortfolio]

Improved methane elimination by methane-oxidizing bacteria immobilized on modified oil shale semicoke.

Methane is a greenhouse gas with significant global warming potential. The methane-oxidizing bacteria (MOB) immobilized on biocarrier could perform effectively and environmentally in methane eliminati...

Using permutational and multivariate statistics to understand inorganic well water chemistry and the occurrence of methane in groundwater, southeastern New Brunswick, Canada.

Concerns over possible impacts from the rapid expansion of unconventional oil and natural gas (ONG) resource development prompted a regional domestic well sampling program focusing on the Carboniferou...

Importance of Super-Emitter Natural Gas Well Pads in the Marcellus Shale.

A large-scale study of methane emissions from well pads was conducted in the Marcellus shale (PA), the largest producing natural gas shale play in the U.S., to better identify the prevalence and chara...

Assessment of trace metals in an aquifer with river-groundwater interaction: The influence of colloidal redistribution and porous matrix change on the migration of metals.

An aquifer where receives steady lateral recharge from an AMD-polluted river, was chosen to understand the profound influence of the "solid-liquid phase" evolution on the mobility of trace metals. The...

Performance of different methanogenic species for the microbial electrosynthesis of methane from carbon dioxide.

Microbial electrosynthesis (MES) is a promising technology to convert CO and electricity into the biofuel methane using methanogens. Until now, most investigations on electro-methanogenesis are "proof...

Clinical Trials [2850 Associated Clinical Trials listed on BioPortfolio]

Efficacy and Safety of SYN-010 in IBS-C

Irritable bowel syndrome (IBS) is a gastrointestinal (GI) syndrome characterized by chronic abdominal pain and altered bowel habits in the absence of any organic cause. The symptoms of IBS...

A Study of the Effect of SYN-010 on Subjects With IBS-C

A Randomized, Double-Blind, Parallel-Group, Placebo-Controlled, Multi-Dose Study of the Effect of Two Dosage Strengths of SYN-010 Compared with Placebo on Breath Methane Production in Brea...

Trial Comparing Neomycin to Rifaximin Plus Neomycin in the Treatment of Methane Positive Subjects With Constipation Predominant Irritable Bowel Syndrome (C-IBS)

In this study the investigators aim to compare the efficacy of neomycin to a combination of rifaximin and neomycin in the treatment of C-IBS subjects with methane on their breath test. Thi...

A Migration and Bone Density Study Comparing 2 Types of Bone Cement in the OptiPac Bone Cement Mixing System

The goal of this scientific study is to determine whether there are differences in early migration and prosthesis-near bone density when a standard knee prosthesis is fixed with Refobacin ...

ARENA - Project Atrial Fibrilation Rhine-Neckar Region

ARENA aims to inform patients about the symptoms and the risks of atrial fibrilation. The study design includes three study arms: 1. ARENA Intervention: This project will examine the e...

Medical and Biotech [MESH] Definitions

A drilling technology in which NATURAL GAS is extracted from large deposits of impermeable rock formations known as shale, deep within the earth’s crust. This drilling technique involves injecting large volumes of high-pressure fracturing fluid (a mixture of water, sand, and chemicals) several thousand feet underground, thereby creating cracks or fissures in the shale formation, and releasing trapped gas.

A group of methane-based halogenated hydrocarbons containing one or more fluorine and chlorine atoms.

Organic chemistry methodology that mimics the modular nature of various biosynthetic processes. It uses highly reliable and selective reactions designed to "click" i.e., rapidly join small modular units together in high yield, without offensive byproducts. In combination with COMBINATORIAL CHEMISTRY TECHNIQUES, it is used for the synthesis of new compounds and combinatorial libraries.

Phenomenon of cell-mediated immunity measured by in vitro inhibition of the migration or phagocytosis of antigen-stimulated LEUKOCYTES or MACROPHAGES. Specific CELL MIGRATION ASSAYS have been developed to estimate levels of migration inhibitory factors, immune reactivity against tumor-associated antigens, and immunosuppressive effects of infectious microorganisms.

Chemistry dealing with the composition and preparation of agents having PHARMACOLOGIC ACTIONS or diagnostic use.

Advertisement
Quick Search
Advertisement
Advertisement

 


DeepDyve research library

Relevant Topic

Food
Food is any substance consumed to provide nutritional support for the body. It is usually of plant or animal origin, and contains essential nutrients, such as carbohydrates, fats, proteins, vitamins, or minerals. The substance is ingested by an organism ...


Searches Linking to this Article