Oil shale formation in the Upper Cretaceous Nenjiang Formation of the Songliao Basin (NE China): Implications from organic and inorganic geochemical analyses

Basin evolution and oil shale deposition during Upper Cretaceous in the Songliao Basin (NE China): Implications from sequence stratigraphy and geochemistry

“…limited data exist regarding their use as "oil shales" and their potential as "unconventional" reservoirs within the Songliao Basin (Bechtel et al, 2012;Feng et al, 2009;Jia et al, 2013a;Fu et al, 1990;Wang et al, 2011;Wu et al, 2009Wu et al, , 2013Zhou and Littke, 1999).…”

“…The formation of oil shale needs sufficient OM and favorable conditions for OM preservation caused by the interaction of palaeo-tectonic, palaeoenvironment, palaeoclimate and primary productivity (Kara and Korkmaz, 2008;Bechtel et al, 2012;Jia et al, 2013a). Therefore, the study focusses on the reconstruction of the above factors and their effect on oil shale deposition.…”

“…Based on macroscopic core description and chemical analysis, oil shales occur in the lower part of Qingshankou Formation 1st member (K 2 qn 1 ) and the bottom of Nenjiang Formation 1st and 2nd members (K 2 n 1 , K 2 n 2 ) (Jia et al, 2013a;Liu et al, 2009). The formation of oil shale needs sufficient OM and favorable conditions for OM preservation caused by the interaction of palaeo-tectonic, palaeoenvironment, palaeoclimate and primary productivity (Kara and Korkmaz, 2008;Bechtel et al, 2012;Jia et al, 2013a).…”

High resolution geochemical analysis of organic matter accumulation in the Qingshankou Formation, Upper Cretaceous, Songliao Basin (NE China)

“…In lacustrine environments, primary productivity is governed by phosphate concentration in the water as the important nutrient for autochthonous OM production (Engstrom and Wright, 1984;Anderson et al, 2002;Carpenter, 2008;Schindler et al, 2008;Shen et al, 2010;Yuan Jian, 2012;Jia et al, 2013a). Hence, phosphorus (P) contents in the sediments can be used as an indicator reflecting primary productivity.…”

“…Because of its excellent oil and gas potential, organic matter (OM) of the Qingshankou Formation has been studied during the last few decades (Li, 1995;Zhou and Littke, 1999;Jia et al, 2013a). However, previous studies of the Qingshankou Formation source rock focused on the potential of hydrocarbon generation, and the large scale general conditions leading to OM accumulation (Xue and William, 1993;Huang et al, 1997;Feng et al, 2009;Jia, 2012;Sun, 2013).…”