Portal de Periódicos da CAPES

Artigo Produção Nacional Revisado por pares

BIBTEX RIS

Quartz and Fe-dolomite Cements Record Shifts in Formation-water Chemistry and Hydrocarbon Migration in Devonian Shoreface Sandstones, Ghadamis Basin, Libya

2017; Society for Sedimentary Geology; Volume: 88; Issue: 1 Linguagem: Inglês

10.2110/jsr.2017.66

1938-3681

Muftah Khalifa, Howri Mansurbeg, Daniel Morad, S. Morad, Ihsan S. Al‐Aasm, Pavel Spirov, Andrea Ceriani, Luiz Fernando De Ros,

Geochemistry and Geologic Mapping

Research Article| January 09, 2017 Quartz and Fe-dolomite Cements Record Shifts in Formation-water Chemistry and Hydrocarbon Migration in Devonian Shoreface Sandstones, Ghadamis Basin, Libya Muftah A. Khalifa; Muftah A. Khalifa 1Department of Earth Sciences, Uppsala University, 752 36 Uppsala, Sweden Search for other works by this author on: GSW Google Scholar Howri Mansurbeg; Howri Mansurbeg 2Department of Petroleum Geosciences, Soran University, Soran, Kurdistan Region, Iraq Search for other works by this author on: GSW Google Scholar Daniel Morad; Daniel Morad 3Department of Earth Sciences, University of Oslo, N-0316 Oslo, Norway Search for other works by this author on: GSW Google Scholar Sadoon Morad; Sadoon Morad 4Department of Petroleum Geosciences, Khalifa University of Science and Technology, Petroleum Institute, Abu Dhabi, United Arab Emirates Search for other works by this author on: GSW Google Scholar Ihsan S. Al-Aasm; Ihsan S. Al-Aasm 5Department of Earth and Environmental Sciences, University of Windsor, Windsor, Ontario, Canada Search for other works by this author on: GSW Google Scholar Pavel Spirov; Pavel Spirov 6Technical University of Ostrava, VŠB-TUO/Erbil Campus, Erbil, Kurdistan Region, Iraq Search for other works by this author on: GSW Google Scholar Andrea Ceriani; Andrea Ceriani 4Department of Petroleum Geosciences, Khalifa University of Science and Technology, Petroleum Institute, Abu Dhabi, United Arab Emirates Search for other works by this author on: GSW Google Scholar Luiz Fernando De Ros Luiz Fernando De Ros 7Universidade Federal do Rio Grande do Sul, Instituto de Geociências, Avenida Bento Gonçalves, 9500, CEP 91501-970 Porto Alegre, Brazil Search for other works by this author on: GSW Google Scholar Author and Article Information Muftah A. Khalifa 1Department of Earth Sciences, Uppsala University, 752 36 Uppsala, Sweden Howri Mansurbeg 2Department of Petroleum Geosciences, Soran University, Soran, Kurdistan Region, Iraq Daniel Morad 3Department of Earth Sciences, University of Oslo, N-0316 Oslo, Norway Sadoon Morad 4Department of Petroleum Geosciences, Khalifa University of Science and Technology, Petroleum Institute, Abu Dhabi, United Arab Emirates Ihsan S. Al-Aasm 5Department of Earth and Environmental Sciences, University of Windsor, Windsor, Ontario, Canada Pavel Spirov 6Technical University of Ostrava, VŠB-TUO/Erbil Campus, Erbil, Kurdistan Region, Iraq Andrea Ceriani 4Department of Petroleum Geosciences, Khalifa University of Science and Technology, Petroleum Institute, Abu Dhabi, United Arab Emirates Luiz Fernando De Ros 7Universidade Federal do Rio Grande do Sul, Instituto de Geociências, Avenida Bento Gonçalves, 9500, CEP 91501-970 Porto Alegre, Brazil e-mail: howri.mansurbeg@soran.edu.iq Publisher: SEPM Society for Sedimentary Geology First Online: 11 Jan 2018 Online Issn: 1938-3681 Print Issn: 1527-1404 Copyright © 2018, SEPM (Society for Sedimentary Geology) Journal of Sedimentary Research (2018) 88 (1): 38–57. https://doi.org/10.2110/jsr.2017.66 Article history First Online: 11 Jan 2018 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn MailTo Tools Icon Tools Get Permissions Search Site Citation Muftah A. Khalifa, Howri Mansurbeg, Daniel Morad, Sadoon Morad, Ihsan S. Al-Aasm, Pavel Spirov, Andrea Ceriani, Luiz Fernando De Ros; Quartz and Fe-dolomite Cements Record Shifts in Formation-water Chemistry and Hydrocarbon Migration in Devonian Shoreface Sandstones, Ghadamis Basin, Libya. Journal of Sedimentary Research 2017;; 88 (1): 38–57. doi: https://doi.org/10.2110/jsr.2017.66 Download citation file: Ris (Zotero) Refmanager EasyBib Bookends Mendeley Papers EndNote RefWorks BibTex toolbar search Search Dropdown Menu toolbar search search input Search input auto suggest filter your search All ContentBy SocietyJournal of Sedimentary Research Search Advanced Search Abstract Cementation by quartz overgrowths and subsequently by carbonates is a very common global paragenetic phenomenon in sandstones of many basins that is poorly constrained in the literature. Integrated petrography, electron microprobe, stable isotopes, fluid inclusion microthermometry, and Raman spectroscopy have helped unravel the diagenetic conditions, fluid flow, and hydrocarbon migration during the development of quartz overgrowths and later Fe-dolomite cement in the Devonian shoreface sandstones (oil and gas reservoirs), Ghadamis Basin, NW Libya. The high homogenization temperatures of Fe-dolomite (Th = 119 to 140°C) together with its low δ18OVPDB values (–17.6‰ to –13.2‰) and saddle-crystal morphology suggest the flux of hot basinal brines. The fluid-inclusion microthermometry shows a shift from NaCl-dominated brines during quartz cementation (16.0 to 17.3 wt.% NaCl eq.) to NaCl and CaCl2-dominated brines during Fe-dolomite cementation (15.6 to 18.4 wt.% NaCl eq.). The latter brines probably circulated through overlying Mesozoic carbonate and evaporite strata before descending deep into the basin. The similarity in Th ranges for Fe-dolomite and quartz overgrowths, despite the shift in formation-water chemistry suggests precipitation under similar geothermal conditions. The presence of oil-filled inclusions in quartz overgrowths suggests that cementation occurred during oil migration, whereas the presence of methane in inclusions in the Fe-dolomite cement suggests precipitation during gas migration. This study shows that fluid inclusion microthermometry and Raman spectroscopy of the widespread paragenetic sequence of quartz overgrowths followed by carbonate cement are crucial to unravel changes in formation-water chemistry and fluid (including hydrocarbon) migration in sedimentary basins. You do not have access to this content, please speak to your institutional administrator if you feel you should have access.