Geochemical Characterization and Origin of High-Sulfur,Heavy Oils in Jiyang Sub-Basin,East China

作     者：WANG Guangli WANG Tieguan ZHANG Linye 

作者机构：State Key Laboratory of Petroleum Resources and ProspectingChina University of PetroleumBeijing 102249China Institutes of Geological ScienceSINOPEC Shengli Oilfield CompanyDongying 257015China 

出 版 物：《Acta Geologica Sinica(English Edition)》 (地质学报（英文版）)

年 卷 期：2011年第85卷第4期

页      面：923-931页

核心收录：

学科分类：0709[理学-地质学] 0819[工学-矿业工程] 081803[工学-地质工程] 08[工学] 0905[农学-畜牧学] 0818[工学-地质资源与地质工程] 0708[理学-地球物理学] 09[农学] 0816[工学-测绘科学与技术] 

基　　金：Funds to support this research were provided by the National Science Foundation of China(no. 40703011) 

主　　题：high-sulfur heavy oil bacterial sulfate reduction biodegradation lacustrine carbonate 

摘      要：High-sulfur,heavy petroleum is widely occurring in the Tertiary lacustrine Jiyang sub-basin, Bohai Bay *** are differentiated into two families based on the bulk properties and biomarker *** 1 is characterized by high resins（40%-71%）and sulfur（2%-4%）,and low wax （l%-6%）,with n-alkanes removed by biodegradation,whereas family 2 is characterized by extremely abundant sulfur（3%-10%）,and high asphaltenes（7%-31%）and wax（2%-19%）,with no evidence of microbial *** oils of family 1 are distributed in the reservoir,lower than 1500 m throughout the *** assemblages,such as low pristane/phytane ratios（1 Pr/Ph）and a high abundance of carotane,gammacerane,and dinosterane,suggest that they are derived from the calcareous mudstones and shales among the stratified,saline Es_4~u unit,in addition to the in situ biodegradation-concentrated sulfur ***,the oils of family 2 are identified only in the western Zhanhua and eastern Chezhen depressions,with a depth deeper than 1700 *** properties,together with biomarker ratios,including even-numbered n-alkanes,1 Pr/Ph,trace diasteranes,higher C35 homohopanes,and abundant dibenzothiophene series,with1 dibenzothiophene/phenanthrene,indicate an origin from carbonate source *** X-ray diffraction analysis showed that the carbonate source rock is limited in the Es_4~u unit of the Bonan sag,which is different from most other source rocks in the same *** is suggested that the high-sulfur,heavy oils are generated at the early stage of the oil *** sulfate reduction might be responsible for the occurrence of sulfur species in the high-sulfur,heavy oils,while heavy biodegradation will enhance sulfur concentrations.