Geochemical assessment and petroleum systems in the Sinú-San Jacinto Basin, northwestern Colombia文档.pdf

Marine and Petroleum Geology 65 (2015) 217e231 Contents lists available at ScienceDirect Marine and Petroleum Geology journal homepage: /l ocate/marpetgeo Research paper Geochemical assessment and petroleum systems in the Sinú-San Jacinto Basin, northwestern Colombia a b, * Jos e Osorno , Antonio Rangel a Agencia Nacional de Hidrocarburos, Colombia b Halliburton, LA, Colombia a r t i c l e i n f o a b s t r a c t Article history: The Sinú-San Jacinto Basin (SSJB), onshore and offshore, has abundant oil and gas manifestations, Received 15 December 2014 evidencing the existence of various petroleum systems. The onshore oils can be separated into at least Received in revised form two families. The first one (Oil Family I) is derived from source rocks deposited in anoxic marine plat- 12 March 2015 form, and the other one (Oil Family II) is derived from source rocks deposited in deltaic marine envi- Accepted 26 March 2015 ronment with high input of terrestrial organic matter. Also there are heavy biodegrated oil seeps as well Available online 14 April 2015 as oil seeps possibly derived from others organic facies, a troublesome to classify with the available data. Regarding source rock correlations, Cansona Formation bitumens exhibit good correlation with the Oil Keywords: Petroleum systems Family I, and Cienag