LAPSE:2023.35734
Published Article
LAPSE:2023.35734
Synergistic Evolution of Palaeoenvironment—Bionts and Hydrocarbon Generation of Permian Saline Lacustrine Source Rocks in Jimusar Sag, Junggar Basin
Zaibo Xie, Huifei Tao, Yongqiang Qu, Tao Wu, Dongzheng Ma, Tianhai Wang, Zhen Qin, Long Su, Zhongping Li
May 23, 2023
This study focused on Middle Permian Lucaogou Formation saline lake source rocks, utilizing a combination of biomarkers and hydrocarbon generation thermal simulation to analyze their biological compositions, depositional environments, and hydrocarbon generation potential. The Pr/Ph ratio, Ph/nC18 ratio, and Pr/nC17 ratio indicate that the Lucaogou Formation was in a reducing environment during the deposition period, and the lower part of the Lucaogou Formation (P2l1) is more anoxic than the upper part of the Lucaogou Formation (P2l2). The maturity index 20S (%) and ββ (%) reflect that the maturity of organic matter in the P2l1 is slightly higher than that in the P2l2. The G/H index and the ETR index indicate that the stratification of the water column is better during the sedimentary period of Lucaogou Formation and the salinity of the P2l1 is higher than that of the P2l2. The biomarker parameters of nC21−/nC22+, CPI, S/H, and C22T/C21T reflect that the organic matter of the source rocks have a higher abundance of bacteria and algae than higher plants, and the contents of bacteria are more than that of algae. The (7- + 8-MMAs)/Cmax and (C28 + C29 − St)/St parameters indicate that cyanobacteria accounted for a certain proportion of bacteria, and the algae are mainly green algae. The co-evolution of the sedimentary environment and the biological composition reflects the control of the sedimentary paleoenvironment on biological composition. According to the relative content of cyanobacteria, green algae, and Rhodophyta, the source rocks of the upper and lower Lucaogou Formation correspond to the low-salinity type (LS-type) and the high-salinity type (HS-type), respectively. Compared with LS-type source rocks, HS-type source rocks have greater generation potential of oil and weaker gas generation potential. This study is valuable for the accurate assessment of source rocks and holds significant practical implications for the exploration of oil and gas resources.
Keywords
biomarker, hydrocarbon generation, Jimusar, Lucaogou Formation, synergistic evolution
Suggested Citation
Xie Z, Tao H, Qu Y, Wu T, Ma D, Wang T, Qin Z, Su L, Li Z. Synergistic Evolution of Palaeoenvironment—Bionts and Hydrocarbon Generation of Permian Saline Lacustrine Source Rocks in Jimusar Sag, Junggar Basin. (2023). LAPSE:2023.35734
Author Affiliations
Xie Z: Oil and Gas Research Center, Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Lanzhou 730000, China; National Engineering Research Center of Offshore Oil and Gas Exploration, Beijing 100027, China; University of Chinese A
Tao H: Oil and Gas Research Center, Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Lanzhou 730000, China; National Engineering Research Center of Offshore Oil and Gas Exploration, Beijing 100027, China
Qu Y: Northwest Branch of PetroChina Research Institute of Petroleum Exploration and Development, Lanzhou 730000, China
Wu T: Research Institute of Exploration and Development, Petrochina Xinjiang Oilfield Company, Karamay 834000, China
Ma D: Oil and Gas Research Center, Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Lanzhou 730000, China; National Engineering Research Center of Offshore Oil and Gas Exploration, Beijing 100027, China; University of Chinese A
Wang T: Oil and Gas Research Center, Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Lanzhou 730000, China; National Engineering Research Center of Offshore Oil and Gas Exploration, Beijing 100027, China; University of Chinese A
Qin Z: Oil and Gas Research Center, Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Lanzhou 730000, China; National Engineering Research Center of Offshore Oil and Gas Exploration, Beijing 100027, China; University of Chinese A
Su L: Oil and Gas Research Center, Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Lanzhou 730000, China; National Engineering Research Center of Offshore Oil and Gas Exploration, Beijing 100027, China
Li Z: Oil and Gas Research Center, Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Lanzhou 730000, China
Journal Name
Energies
Volume
16
Issue
9
First Page
3797
Year
2023
Publication Date
2023-04-28
Published Version
ISSN
1996-1073
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PII: en16093797, Publication Type: Journal Article
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LAPSE:2023.35734
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doi:10.3390/en16093797
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