Lithological and Geochemical Heterogeneity of the Organo-Mineral Matrix in Carbonate-Rich Shales
| Autor: | Elena Kozlova, N. N. Bogdanovich, Tagir Karamov |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
020209 energy
Geochemistry 02 engineering and technology lithological characteristic 010502 geochemistry & geophysics 01 natural sciences Matrix (geology) chemistry.chemical_compound 0202 electrical engineering electronic engineering information engineering Organic matter hydrocarbons 0105 earth and related environmental sciences Maturity (geology) chemistry.chemical_classification QE1-996.5 Mineral organo-mineral matrix Geology geochemical parameters Diagenesis carbonate rock chemistry pyrolysis Rock-Eval General Earth and Planetary Sciences Carbonate Carbonate rock heterogeneity Pyrolysis |
| Zdroj: | Geosciences Volume 11 Issue 7 Geosciences, Vol 11, Iss 295, p 295 (2021) |
| ISSN: | 2076-3263 |
| DOI: | 10.3390/geosciences11070295 |
| Popis: | The paper discusses the issues of interaction of the organic matter and the siliceous-carbonate mineral matrix in unconventional reservoirs of the Upper Devonian Domanik Formation of the Upper Kama Depression of the Volga-Ural Basin. The Domanik Formation is composed of organic-rich low-permeability rocks. Lithological and geochemical peculiarities of rocks were studied using light microscopy, X-ray diffraction analysis (XRD), scanning electronic microscopy (SEM), and evaporation method. Organic matter was examined by the Rock-Eval pyrolysis with quantitative and qualitative evaluation of generation potential and maturity degree. Integrated analysis of results of lithological and geochemical studies allowed identifying intervals in the studied section where organic matter can form a complex association with the siliceous-carbonate matrix. It was fixed experimentally that in some cases the mineral carbonate matrix and the organic matter form a one-whole high-molecular compound. The authors supposed that in the course of sedimentation, organic matter is immobilized into the structure of the mineral carbonate matrix. At the deposition and diagenesis stage, the carbonate matter interacts with acids of the organic matter and forms natural organo-mineral polymers. Special physicochemical properties of such organo-mineral associations shed new light onto the problems of producing from hard-to-develop nonconventional carbonate reservoirs and evaluating the associated risks. |
| Databáze: | OpenAIRE |
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