Comparison of the Petroleum Geology in the Deep-Water Basins between the Passive Margin of Morocco and Its Conjugate Mar
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ISSN 1674-487X
Comparison of the Petroleum Geology in the Deep-Water Basins between the Passive Margin of Morocco and Its Conjugate Margin of Canada Chengpeng Song
1
, Shu Jiang *2, Zhixin Wen
1
, Zhaomin Wang1
1. PetroChina Research Institute of Petroleum Exploration and Development, Beijing 100083, China 2. Key Laboratory of Tectonics and Petroleum Resources of Ministry of Education & School of Earth Resources, China University of Geosciences, Wuhan 430074, China Chengpeng Song: https://orcid.org/0000-0002-8249-4264; Shu Jiang: https://orcid.org/0000-0002-6272-7649 ABSTRACT: This paper systematically investigates and compares the petroleum geology elements and oil and gas exploration potential in the deep-water basins along the conjugate passive margins between Morocco in NW Africa and Nova Scotia in Canada. Both the deep-water basins along the passive margin in Morocco and its conjugate passive margin deep-water basin in Nova Scotia have undergone similar multiple stages of tectonic evolution. These conjugate basins both have Jurassic and Cretaceous source rocks; Triassic sandstone, Jurassic–Cretaceous carbonate and sandstone, and Miocene–Pliocene sandstone reservoirs; multiple sets of mudstones and regional Triassic salt as caprocks. These characteristics indicate good hydrocarbon accumulation conditions and exploration prospects. The comparison also reveals that the key exploration targets in the deep-water basins of Morocco should be Tertiary turbidite sandstone reservoirs and Jurassic– Cretaceous sandstone and carbonate reservoirs. Compared with the Scotian Basin, the Morocco deep-water basins may have Paleozoic play potential sourced from the mature Silurian hot shale source rock that extends from the onshore NW African Plate. The prospective exploration targets in the deep-water Scotian Basin should be focused on the Jurassic and Cretaceous deep-water turbidite sandstone reservoirs formed by widely-developed large river systems. KEY WORDS: conjugate margins, Morocco, Nova Scotia, tectonic evolution, petroleum geology, exploration potential. 0
INTRODUCTION Recently, conjugate margins have been a research focus for explorations of petroleum deposits and investigations of Earth history, plate tectonics, ocean science, basin evolution, etc. Atlantic margins are a type conjugate margin, and they have been studied to reveal the evolution process of rifted continental margins and lacustrine to deep-water turbidite depositional systems. Many of the major hydrocarbon-bearing basins of passive continental margins are distributed on both sides of the Atlantic Ocean. Most basins in the Atlantic margins remain under-explored despite ongoing production in some basins since the 1970s. At present, many hydrocarbon discoveries have been made in the passive margin basins of the Gulf of Mexico and Brazil and West Africa on both sides of the South Atlantic Ocean (Modelevsky and Modelevsky, 2016; Zou et al., 2015; Liu et al., 2008). However, due to differences in evolutionary time span and geologic history during the evol
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