Use of comprehensive two-dimensional gas chromatography for the characterization of ultra-deep condensate from the Bohai Bay Basin, China

Giant gas discovery in the Precambrian deeply buried reservoirs in the Sichuan Basin, China: Implications for gas exploration in old cratonic basins

“…The Qingbaikou System, Jixian System, and Changcheng System (1800-800 Ma) are only found on the North China platform. So far, oil and gas have been discovered in the Mesoproterozoic reservoirs on the North China Platform, but oil-source correlations show that the oil and gas were derived mainly from source rocks in the Cenozoic Shahejie Formation (Zhu et al, 2013b;Jin et al, 2014a), which belongs to a petroleum system of young source rocks and ancient reservoir rocks. There is no commercial primary oil or gas discoveries in North China, but some oil and gas shows have been reported (Wang and Han, 2011).…”

Geochemical Significance of Discovery in Cambrian Reservoirs at Well ZS1 of the Tarim Basin, Northwest China

“…20 For a typical thermal cracked condensate in the Tazhong Uplift, taking TZ83 as an example, concentration of 3-+ 4-MDs reaches 181 µg/g in condensate. 46 Another oil cracked condensate in well YN2 at Tadong area has the concentration of 3-and 4-MDs about 250 µg/g. 27 Condensate in 6425 -6496 m has concentration of 4-and 3-MDs < 10 µg/g and condensate in 6439 -6458 m has no detectable 4-and 3-MDs, indicating condensates in well ZS1 mainly derived from kerogen cracking at high maturity stage without significant contribution from preexisted oil cracking.…”

“…4), which are dominated by naphthalene series Diamondoids identification by GC × GC/TOFMS has described in our previous study. 46 Alkyladamantanes are examined using m/z 135, 136, 149, 163, and 177 ions and alkyldiamantanes are examined using m/z 187, 188, and 201 ions (Fig. 6).…”

High abundance of alkylated diamondoids, thiadiamondoids and thioaromatics in recently discovered sulfur-rich LS2 condensate in the Tarim Basin

“…The concentrations of diamondoids, thiadiamondoids and other products were quantified on the basis of peak areas relative to an internal standard (D 16 -adamantane). Further details of the sample pretreatment procedures and operating conditions for the GCGC-TOFMS analysis of gas condensate can be found elsewhere (Zhu et al, 2013b).…”