Organic inclusion and hydrocarbon charging events of the Bagung Formation in the Quemoco area, Qiangtang Basin

CHENG Leli; CHEN Wenbin; WANG Jian; CHEN Gongyang; WAN Youli; LI Xueren

2021 Vol. 40, No. 9

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CHENG Leli, CHEN Wenbin, WANG Jian, CHEN Gongyang, WAN Youli, LI Xueren. Organic inclusion and hydrocarbon charging events of the Bagung Formation in the Quemoco area, Qiangtang Basin[J]. Geological Bulletin of China, 2021, 40(9): 1493-1501.

Citation:

CHENG Leli, CHEN Wenbin, WANG Jian, CHEN Gongyang, WAN Youli, LI Xueren. Organic inclusion and hydrocarbon charging events of the Bagung Formation in the Quemoco area, Qiangtang Basin[J]. Geological Bulletin of China, 2021, 40(9): 1493-1501.

Organic inclusion and hydrocarbon charging events of the Bagung Formation in the Quemoco area, Qiangtang Basin

1.
Institute of Mud Logging Technology and Engineering, Yangtze University, Jingzhou 434023, Hubei, China
2.
State Key Laboratory of Petroleum Resources and Prospecting, China University of Petroleum, Beijing 102249, China
3.
Chengdu Center, China Geological Survey, Chengdu 610081, Sichuan, China
4.
Qiangtang Institute of Sedimentary Basin, Southwest Petroleum University, Chengdu 610500, Sichuan, China

More Information

Corresponding author: CHEN Gongyang, gychen8888@126.com

Received Date: 01 November 2019

Revised Date: 11 June 2021

Publish Date: 15 September 2021

Abstract

Abstract

The Upper Triassic Bagung Formation is one of the most important hydrocarbon-bearing strata in the Qiangtang Basin.Based on the analysis of fluid inclusion facies, microscopic temperature measurement and microscopic fluorescence analysis, the brine inclusions in the sandstone of the Bagung Formation in Quemoco area recorded 4 stages of thermal fluid activity, of which the second to the third stage fluid contain two types of oil phase inclusions.In stage 2 to stage 3 of thermal fluid activity, a small number of yellowish fluorescent oil inclusions are mainly distributed in the cracks within the quartz particles, and a large number of blue fluorescent oil inclusions are mainly distributed in the quartz secondary enlarged side.Based on the occurrence and fluorescence spectrum characteristics of the two types of oil inclusions, combined with comprehensive analysis of stratigraphic burial history and hydrocarbon generation history, it is considered that they represent a period of Late Jurassic oil and gas filling, which is consistent with the central basin.
- Qiangtang Basin /
- Quemoco area /
- Bagung Formation /
- organic inclusion /
- hydrocarbon charging events

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References

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