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Geoscience ›› 2020, Vol. 34 ›› Issue (04): 812-820.DOI: 10.19657/j.geoscience.1000-8527.2020.04.16

• Petroleum Geology • Previous Articles     Next Articles

Application of Diamondoids in Geochemical Research of Deep Oil and Gas

YAN Jifa1,2(), MA Anlai3(), LI Xianqing1,2, CONG Gangshi1,2, HE Yukai1,2, ZHANG Yachao1,2   

  1. 1. State Key Laboratory of Coal Resources and Safe Mining, China University of Mining and Technology, Beijing 100083, China
    2. College of Geoscience and Surveying Engineering, China University of Mining and Technology, Beijing 100083, China
    3. Exploration and Production Research Institute, SINOPEC, Beijing 100083, China
  • Received:2019-06-30 Revised:2019-09-17 Online:2020-08-31 Published:2020-09-03
  • Contact: MA Anlai

Abstract:

In recent years, oil and gas exploration in China has expanded to ultra-deep formations, and oil and gas maturity and reservoir preservation have become the focus of research. Because of their unique cage molecular structure, strong thermal stability and biodegradability, diamondoids have broad application potential in deep oil and gas exploration. In this paper, laboratory sample pretreatment and detection methods of diamondoids are described, and their genesis and geological evolution are summarized. New advancement in maturity, oil-cracking, biodegradation, thermochemical sulfate reduction (TSR), evaporative fractionation, and other identification methods with diamondoids are reviewed. Applications of diamondoids in the petroleum geochemistry are limited due to its unknown origin. It is proposed that comparative studies on the evolution process of diamondoids in different sedimentary environments, different types of source rocks and crude oils should be performed, in order to study the methyl-diamantane baseline of crude oils in different sedimentary basins. This can supplement and improve the applications of diamondoids, and can greatly enhance our understanding in deep hydrocarbon accumulation processes and guide deep hydrocarbon exploration.

Key words: diamondoids, maturity, oil-cracking, biodegradation, thermochemical sulfate reduction (TSR), evaporative fractionation

CLC Number: