Biomarker 17α(H)-diahopane: A geochemical tool to study the petroleum system of a Tertiary lacustrine basin, Northern South China Sea

Identification of the four rearranged hopane series in geological bodies and their geochemical significances

“…Although the precursors of these compounds and genetic mechanisms remain to be determined, the occurrence and distribution of these series of rearranged hopanes indicate that they may serve as good indicators of organic facies, depositional environment and maturity. The wide applications of geochemical parameters of rearranged hopanes in petroleum geology also confirm this (Huang et al 2003;Li et al 2009;Zhang 2013).…”

“…(Zhu et al 2007;Li et al 2009;Zhang 2013;Cheng et al 2014). For instance, Horstad et al (1990) measured C 30 diahopane/(C 30 diahopane ?…”

“…In recent years, rearranged hopanes have received increasing attention as biological markers with applications for geochemical studies of petroleum source rocks and crude oils (Huang et al 2003;Li et al 2009;Zhang et al 2009;Cheng et al 2014). However, systematic identification of the four rearranged hopane series is not reported in the domestic and overseas literature.…”

Ratios of low molecular weight alkylbenzenes (C0–C4) in Chinese crude oils as indicators of maturity and depositional environment

“…Oils in this area mainly occur in the E 2 l 3 member of the Liushagang Formation and are dominated by light oil or condensate . The organic-rich mudstones of the Liushagang Formation (E 2 l), deposited in a series of well-developed lakes under suboxic to anoxic, fresh-brackish environments, were proposed to be the most important source rocks in this depression (Li et al, 2008Bao et al, 2013;Huang et al, 2013). These source rocks contain numerous lamalginites and type I and II kerogen (Huang et al, 2013).…”

Geochemical characteristics and families of the Paleozoic oil seepage and solid bitumen in the Southern Guizhou Depression, SW China

“…7). C 30 17a(H)-diahopane in crude oil is considered to be derived from hop-17(21)-ene intermediates via an allylic oxidation step at C-15 and C-16, and double bond formation and rearrangement involving the methyl group at C-14 during diagenesis (Peters and Moldowan 1993;Li et al 2009). Depositional conditions such as Eh-pH and clay content have greater C30diaH (Philip and Gilbert 1985;Wang et al 2000;Zhao and Zhang 2001).…”