Special Issue "Stable Isotope Systematics of Coalbed Gas and Shale Gas during Desorption and Production"
A special issue of Geosciences (ISSN 2076-3263).
Deadline for manuscript submissions: closed (15 April 2020).
We are proposing this Special Edition to gather research experts and their views and observations on stable isotope signatures and fractionation of shale and coal gases during lab experiments and during commercial production, in order to better understand underlying phenomena, improve systematics, and propose new avenues of studies and suggest solutions for the petroleum industry. The complex structure of coals and shales contains high fractions of kerogen and clay minerals, which control their anisotropic and complex porosity and permeability at four levels: Within the kerogen structure, intergranular, cleats/micro fractures, and large-scale fractures. Therefore, gas release from these rocks can be a cascading multiprocess and can include adsorption/desorption, diffusion, laminar flow, Knudsen flow, Darcy flow, chromatographic effects, etc. The isotopic fractionation can have different patterns depending on the process, its character and timing (kinetic versus equilibrium effects), and special extent and boundaries (e.g., core vs producing well). An additional imprint on these isotopic patterns can be caused by anthropogenic interference with rock properties and mineralogy, i.e., via fracturing and introduction of associated fluids, surfactants or even fresh water. Studies of C, H, O isotopes, including clumped, of CO2, CH4, and other organic and inorganic gases are of high interest.
Dr. Dariusz Strąpoć
Manuscript Submission Information
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- Shale gas
- Coalbed gas
- Isotope fractionation