Dibenzothiophenes and benzo[b]naphthothiophenes: Molecular markers for tracing oil filling pathways in the carbonate reservoir of the Tarim Basin, NW China

Oil charging history and pathways of the Ordovician carbonate reservoir in the Tuoputai region, Tarim Basin, NW China

“…1). The location of the source kitchen/ bed is in agreement with the findings of previous studies (e.g., Wang et al 2008;Chang et al 2013b;Xiao et al 2016;Fang et al 2016). During recent oil exploration efforts, a number of new boreholes in the south part of the Tuoputai region have delivered commercial light oil yields.…”

“…1). The Tabei Uplift has undergone multistage tectonic events, including (1) the formation of the pre-Sinian basement and rift during the Sinian to Ordovician, (2) the formation of a paleo-uplift during the Silurian to Permian and its evolution (250-290 Ma), (3) the formation of a foreland basin during the Triassic to Jurassic period, (4) the extension of the basin during the Cretaceous to Neogene and (5) the rapid subsidence from the late Neogene to Quaternary (Kang and Kang 1996;Jia and Wei 2002;Jin et al 2008;Zhu et al 2011Zhu et al , 2013Fang et al 2016). The sedimentary successions of the Tabei Uplift are marine sediments (Sinian to Ordovician), marine-terrestrial transitional successions (Carboniferous to Permian) and terrestrial sequences (Triassic to Quaternary).…”

“…These molecular indicators were successfully applied in Tertiary sandstone reservoirs in the north margin basins of the South China Sea (Wang et al 2004a;Li et al 2008) and in the Ordovician carbonate reservoir of a karst pore-fissurenetwork type in the Tahe and Halahatang Oilfields of the Tarim Basin (Wang et al 2004aLi et al 2014a, b;Fang et al 2016). The results suggest that these parameters can be used as an effective tracing indicator for oil filling orientation and migration pathways.…”

“…By combining multiple molecular indicators, such as the total content of pyrrolic nitrogen compounds and 4-/1-MDBT, Wang et al (2004aWang et al ( , 2008 determined that oils charge from south to north generally in the Tahe Oilfield. Much work has also been done, using various geochemical parameters, on the oil filling history and migration orientation of Ordovician reservoirs in other oilfields in the Tabei Uplift, including the Lunnan Oilfield (Wang et al 2004b;Zhang and Huang 2005;Gong et al 2007;Lu et al 2008;Zhu et al 2013), the Yakela Oilfield (Li et al 2013a, b) and the Halahatang Oilfield (e.g., Chang et al 2013b;Fang et al 2016;Xiao et al 2016). However, little work has been done on the oil reservoir geochemistry of the Tuoputai region in the Tabei Uplift.…”

Migration and accumulation of crude oil in Upper Triassic tight sand reservoirs on the southwest margin of Ordos Basin, Central China: A case study of the Honghe Oilfield

“…But the other three are applicable over a wide range of maturity and correlate well with each other; therefore, this paper chose Ts/ (Ts + Tm) and C 29 Ts/C 29 H as representative for the next study ( Figure 7). Previous studies (Fang et al, 2016;Li et al, 2008;Wang, He, Li, Hou, & Guo, 2004) have demonstrated that the parameters of alkyl dibenzothiophene (dibenzothiphenes, methyldibenzothiphenes…”