Source rock analysis, thermal maturation and hydrocarbon generation in Siluro-Devonian rocks of the Gaspe Belt basin, Canada.

Abstract

Research Article| June 01, 2001 Source rock analysis, thermal maturation and hydrocarbon generation in Siluro-Devonian rocks of the Gaspé Belt basin, Canada. Rudolf Bertrand; Rudolf Bertrand INRS-Géoressources, Centre géoscientifique de Québec, 880 chemin Sainte-Foy, P.O. Box 7500, Sainte-Foy, QC, G1V 4C7 Search for other works by this author on: GSW Google Scholar Michel Malo Michel Malo INRS-Géoressources, Centre géoscientifique de Québec, 880 chemin Sainte-Foy, P.O. Box 7500, Sainte-Foy, QC, G1V 4C7 Search for other works by this author on: GSW Google Scholar Author and Article Information Rudolf Bertrand INRS-Géoressources, Centre géoscientifique de Québec, 880 chemin Sainte-Foy, P.O. Box 7500, Sainte-Foy, QC, G1V 4C7 Michel Malo INRS-Géoressources, Centre géoscientifique de Québec, 880 chemin Sainte-Foy, P.O. Box 7500, Sainte-Foy, QC, G1V 4C7 Publisher: Canadian Society of Petroleum Geologists First Online: 02 Mar 2017 Online ISSN: 2368-0261 Print ISSN: 0007-4802 © The Society of Canadian Petroleum Geologists Bulletin of Canadian Petroleum Geology (2001) 49 (2): 238–261. https://doi.org/10.2113/49.2.238 Article history First Online: 02 Mar 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn Email Permissions Search Site Citation Rudolf Bertrand, Michel Malo; Source rock analysis, thermal maturation and hydrocarbon generation in Siluro-Devonian rocks of the Gaspé Belt basin, Canada.. Bulletin of Canadian Petroleum Geology 2001;; 49 (2): 238–261. doi: https://doi.org/10.2113/49.2.238 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 SocietyBulletin of Canadian Petroleum Geology Search Advanced Search Abstract The northeastern Gaspé Peninsula is divided into two distinct tectono-stratigraphic domains: Cambro–Ordovician rocks of the Humber and Dunnage zones, to the north, and Siluro–Devonian rocks of the Gaspé Belt, to the south. The northeastern part of the Gaspé Belt is being investigated for its hydrocarbon potential. This area is dissected by major NW-trending faults that divide the study area into three tectonic domains: the northern, central and southern blocks. During the Late Silurian-Early Devonian Salinic disturbance, the faults were active as synsedimentary normal faults. Faults were reactivated as dextral strike-slip faults during the Middle Devonian Acadian Orogeny. Regional Acadian folds are ENE- to E-trending. Locally, NW-trending folds related to the Salinic disturbance occur close to the faults.Because of their total organic carbon content (TOC), the Cambro-Ordovician rocks were considered to be more likely source rocks than rocks of the Siluro-Devonian Gaspé Belt before maturation.Good source rock intervals are locally present in the York River Formation, in all the tectonic blocks of the study area. These beds are rich in organic matter, are marginally mature and of limited extent. Based on TOC and Rock-Eval analyses, the Indian Point and Forillon formations show significant thicknesses of fair source rocks in some wells of the central block where most oil indications and seeps occur. Our results indicate that these source rocks have the highest hydrocarbon potential.A new calibration is proposed between the reflectance of collotelinite (standard vitrinite) and that of chitinozoans and solid bitumen, which are more common than vitrinite in marine successions of the Gaspé Belt. Interpretation of reflectance analysis indicates that thermal maturation in the Gaspé Belt succession is primarily related to burial and occurred during deposition of the Gaspé Sandstones. Maximum burial is contemporaneous with Acadian ENE- to E- trending folding and pre-dates strike-slip faulting. Oil and condensate in Indian Point and Forillon formations were mostly produced before the Acadian deformation, but after the Salinic disturbance. Potential source rocks of the York River Formation generated some oil during and after Acadian deformation. You do not have access to this content, please speak to your institutional administrator if you feel you should have access.