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Energies | Free Full-Text | Quantitative Identification of Water Sources of Coalbed Methane Wells, Based on the Hydrogen and Oxygen Isotopes of Produced Water—A Case of the Zhijin Block, South China

The quantitative identification of water sources is an important prerequisite for objectively evaluating the degree of aquifer interference and predicting the production potential of coalbed methane (CBM) wells. However, this issue has not been solved yet, and water sources are far from being completely understood. Stable water isotopes are important carriers of water source information, which can be used to identify the water sources for CBM wells. Taking the Zhijin block in the Western Guizhou Province as an example, the produced water samples were collected from CBM wells. The relationships between the stable isotopic compositions of the produced water samples and the production data were quantitatively analyzed. The following main conclusions were obtained. (1) The δD and δ18O values of the produced water samples were between −73.37&permil; and −27.56&permil; (average −56.30&permil;) and between −11.04&perm ....

United States , Institute Of Geochemistry , Chinese Academy Of Sciences Guiyang , Key Laboratory Of Environmental Geochemistry , Finnigan Inc , Upper Permian , Western Guizhou , South China , Upper Permian Longtan Formation , Changxing Formation , Lower Triassic Feixianguan Formation , Emeishan Basalt Formation , Groundwater Stable Isotopic , Water Sources , Shaopu River , Thermo Electron , San Jose , State Key Laboratory , Environmental Geochemistry , Chinese Academy , Vienna Standard Mean Ocean Water , Southwest China ,

What is the Function of Isotopic Analysis?

Isotopic analysis primarily involves the separation of isotopes based on the significant differences in mass. The method is effective for identifying the isotopic signature within the inorganic and organic compounds. ....

Patriciaf Carvalho Shutterstock , Samudrapom Damsep , Anthropological Sciences , Forensic Sciences Research , Nuclear Chemistry , Vienna Standard Mean Ocean Water , Vienna Pee Dee Belemnite , Vienna Canyon Diablo Troilite , Product Reports , Isotope Ratio Mass , Sciences Research , Analytical Methods , Marine Environment , Isotopic Analysis , Isotope Analysis ,

Perturbation of the deep-Earth carbon cycle in response to the Cambrian Explosion

Perturbation of the deep-Earth carbon cycle in response to the Cambrian Explosion
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Rio Tinto , Monte Carlo , Geological Survey Of Finland , Swiss National Science Foundation Ambizione , Core Reference Library , Beers Group , Vienna Pee Dee Belemnite , Vienna Standard Mean Ocean Water , Excluding Pipes , South Australia , Cambrian Explosion , Sierra Diamonds , Geological Survey , South Australia Drill Core Reference Library , Cape Town , Upper Mantle Research , Swiss National Science Foundation ,

Frontiers | Water and Rock Chemistry Inform Our Understanding of the Deep Biosphere: Case Study in an Archaean Banded Iron Formation

Research into the deep biosphere requires an understanding of both the microbial community at a given site and the geochemical and hydrological factors that support that microbial community. To highlight the interplay between geochemistry and microbiology in these deep environments, we characterized the hydrogeologic and geochemical systems of a 2.7 Ga banded iron formation within the Canadian Shield in the Soudan Underground Mine State Park in Minnesota, USA, a site known to host a lithotrophic microbial community. Calcium-sodium-chloride brines, characteristic of deep groundwaters throughout the Canadian Shield, were found in the site with total dissolved solids as high as 116,000 ppm in one borehole. Comparison of the Soudan waters to those found at other sites in the Canadian Shield or other sites of deep biosphere research indicate that they are notable for their high magnesium concentrations relative to total salinity. Additionally, the most saline Soudan waters have distinct 2H ....

New York , United States , Kidd Creek , North Karelia , Soudan Underground Mine State Park , Southwest Finland , South Africa , Canadian Shield , Canada General , Keweenaw Peninsula , Drill Hole , North West , Free State , South Dakota , Soudan Mine , University Of Minnesota , South African , Conrad Gregoire , Van Heerden , Oneil Carlson , Sherwood Lollar , Cosmochimica Acta , Van Rooyen , Ma Lin , Kaapvaal Craton , Marinobacter Subterrani ,

Purification of Disc-Shaped Diatoms from the Southern Ocean Sediment by a Cell Sorter to Obtain an Accurate Oxygen Isotope Record

Purification of Disc-Shaped Diatoms from the Southern Ocean Sediment by a Cell Sorter to Obtain an Accurate Oxygen Isotope Record
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United States , Rv Hakuho Maru , Indian Ocean , Co Ltd , Beckman Coulter , Removal Of Clay Minerals , Horiba Ltd , Conrad Rise , Southern Ocean , Marine Isotope Stage , Organic Matter , Disc Shaped Diatoms , Clay Minerals , Thermo Finnigan , Thermo Finnigan Conflo , Vienna Standard Mean Ocean Water ,