Distribution and geochemical significance of phenylphenanthrenes and their isomers in selected oils and rock extracts from the Tarim Basin,NW China

作     者：Shao-Ying Huang Mei-Jun Li Ke Zhang T.-G.Wang Zhong-Yao Xiao Rong-Hui Fang Bao-Shou Zhang Dao-Wei Wang Qing Zhao Fu-Lin Yang 

作者机构：Research Institute of Petroleum Exploration and DevelopmentTarim Oilfield CompanyPetroChina State Key Laboratory of Petroleum Resources and ProspectingCollege of GeosciencesChina University of Petroleum 

出 版 物：《Petroleum Science》 (石油科学（英文版）)

年 卷 期：2016年第13卷第2期

页      面：183-191页

核心收录：

学科分类：081803[工学-地质工程] 081704[工学-应用化学] 07[理学] 08[工学] 0817[工学-化学工程与技术] 0818[工学-地质资源与地质工程] 070303[理学-有机化学] 0703[理学-化学] 

基　　金：financially supported by the National Natural Science Foundation of China(Grant No.41272158) the State Key Laboratory of Petroleum Resources and Prospecting(PRP/indep-2-1402) 

主　　题：Phenylphenanthrene Methylphenanthrene Depositional environment Source rock 

摘      要：Twenty-two oil samples and eight source rock samples collected from the Tarim Basin, NW China were geochemically analyzed to investigate the occurrence and distribution of phenylphenanthrene （PhP）, phenylanthracene （PhA）, and binaphthyl （BIN） isomers and methylphenanthrene （MP） isomers in oils and rock extracts with different deposi- tional environments. Phenylphenanthrenes are present in significant abundance in Mesozoic lacustrine mudstones and related oils. The relative concentrations of PhPs are quite low or below detection limit by routine gas chromatogxaphy-mass spectrometry （GC-MS） in Ordovician oils derived from marine carbonates. The ratio of 3-PhP/3-MP was used in this study to describe the relative abundance of phenylphenanthrenes to their alkylated counterparts--methylphenanthrenes. The Ordovician oils in the Tabei Uplift have quite low 3-PhP/3-MP ratios （〈0.10）, indicating their marine carbonate origin, associating with low Pr/Ph ratios （pristane/phytane）, high ADBT/ ADBF values （relative abundance of alkylated dibenzothiophenes to alkylated dibenzofurans）, low C30 diahopane/C3o hopane ratios, and low Ts/（Ts ＋ Tm） （18α-22, 29, 30-trisnorneohopane/（18α-22, 29, 30-trisnorneohopane ＋ 17α-22, 29, 30-trisnorhopane）） values. In contrast, the oils from Mesozoic and Paleogene sandstone reservoirs and related Mesozoic lacustrine mudstones have relatively higher 3-PhP/3-MP ratios （〉0.10）, associating with high Pr/Ph, low ADBT/ ADBF, high Ts/（Ts ＋ Tm）, and C30 diahopane/C30 hopane ratios. Therefore, the occurrence of significant amounts of phenylphenanthrenes in oils typically indicates that the organic matter of the source rocks was deposited in a suboxic envi- ronment with mudstone deposition. The phenylphenanthrenes may be effective molecular markers, indicating depositional environment and lithology of source rocks.