Geochemical characteristics and accumulation of hydrocarbon in Lower Jurassic tight sandstone in Wenjisang area,Turpan Basin,NW China |
| |
| Authors: | Xiaobo Guo Zhilong Huang Ying Jin Chen Chen Tianjun Li |
| |
| Affiliation: | 1. School of Earth Sciences and Engineering, Xi’an Shiyou University, Xi’an, China;2. State Key Laboratory of Petroleum Resources and Prospecting, China University of Petroleum, Beijing, China;3. Research Institute of Exploration and Development, Tuha Oilfield Company, CNPC, Hami, China;4. CNOOC China Limited Shenzhen, Shenzhen, China |
| |
| Abstract: | In order to investigate the geochemical characteristics, sources and accumulation process of Lower-Jurassic Sangonghe Formation tight sandstone oil, multiple geochemical analyses were performed on source rocks, oil samples and sandstone particles from Wenjisang area in Turpan Basin. The results show that coal-measure source rocks have relatively higher organic matter abundance and type-II organic matter for Xishanyao and Badaowan Formations, with the potential of liquid hydrocarbon generation. Oil samples of Sangonghe Formation have the characteristics of coal-measure-formed oil. Higher maturity indicate the oil may be mainly generated by Lower-Jurassic Badaowan Formation source rocks. Quantitative fluorescence parameters also reflect that hydrocarbons charged into Sangonghe Formation through continuous migration from the bottom of sand body to the top gradually. In down dip direction of Wenjisang area may develope continuous tight oil and gas reservoirs in Lower Jurassic. |
| |
| Keywords: | biomarkers quantitative fluorescence technique source rocks tight sandstone oil Turpan Basin |
|
|
