IGGCAS OpenIR  > 新生代地质与环境院重点实验室
Diamondoids and thiadiamondoids generated from hydrothermal pyrolysis of crude oil and TSR experiments
Peng, Yanyan1,2,3; Cai, Chunfang1,2,3,4; Fang, Chenchen6; Wu, Liangliang5; Liu, Jinzhong5; Sun, Peng4; Liu, Dawei1,2,3
2022-01-07
Source PublicationSCIENTIFIC REPORTS
ISSN2045-2322
Volume12Issue:1Pages:18
AbstractDiamondoid compounds are widely used to reflect thermal maturation of high mature source rocks or oils and oil cracking extents. However, diamondoids and thiadiamondoids were demonstrated to have newly been generated and decomposed in our hydrothermal pyrolysis of crude oil and TSR experiments. Our results show that adamantanes and diamantanes are generated primarily within the maturity range 0.48-2.1% and 1.2-3.0% EasyRo, respectively. Their formation is enhanced and the decomposition of diamantanes obviously lags at elevated temperatures compared with anhydrous experiments. MDI, EAI, DMAI-1, DMDI-2 may serve as reliable maturity proxies at>ca.1.0% EasyRo, and other isomerization indices (TMAI-1, TMAI-2 and DMAI-2) are effective for the highly mature organic matter at EasyRo>2.0%. The extent of oil cracking (EOC) calculated from the broadly used (3-+4-) MD method (Dahl et al. in Nature 399:54-56, 1999) is proven to overestimate, especially for highly cracked samples due to the new generation of (3-+4-) MD. Still, it can be corrected using a new formula at<3.0% EasyRo. Other diamondoid-related indices (e.g., EAI, DMDI-2, As/Ds, MAs/MDs, DMAs/DMDs, and DMAs/MDs) can also be used to estimate EOC. However, these indices cannot be applied to TSR-altered petroleum. TSR is experimentally confirmed to generate diamantanes and thiaadmantanes at 1.81% EasyRo likely via direct reactions of reduced S species with hydrocarbons and accelerate the decomposition of diamantanes at>2.62% EasyRo compared with thermal chemical alteration (TCA). More studies are needed to assess specific mechanisms for the formation of thiadiamondoids under natural conditions.
DOI10.1038/s41598-021-04270-z
Funding OrganizationNational Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China
WOS KeywordTHERMOCHEMICAL SULFATE REDUCTION ; PALEOZOIC PETROLEUM POOLS ; TARIM BASIN ; SMACKOVER FORMATION ; HYDROCARBON RATIOS ; THERMAL-STABILITY ; HYDROUS PYROLYSIS ; ORGANIC-MATTER ; SULFUR ; ADAMANTANES
Language英语
Funding ProjectNational Natural Science Foundation of China[41730424] ; National Natural Science Foundation of China[4181101560]
Funding OrganizationNational Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China
WOS Research AreaScience & Technology - Other Topics
WOS SubjectMultidisciplinary Sciences
WOS IDWOS:000740510500248
PublisherNATURE PORTFOLIO
Citation statistics
Document Type期刊论文
Identifierhttp://ir.iggcas.ac.cn/handle/132A11/104004
Collection新生代地质与环境院重点实验室
Corresponding AuthorCai, Chunfang
Affiliation1.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Cenozo Geol & Environm, Beijing 100029, Peoples R China
2.Chinese Acad Sci, Innovat Acad Earth Sci, Beijing 100029, Peoples R China
3.Univ Chinese Acad Sci, Coll Earth & Planetary Sci, Beijing 100049, Peoples R China
4.Yangtze Univ, Minist Educ, Key Lab Explorat Technol Oil & Gas Resources, Wuhan 430100, Hubei, Peoples R China
5.Chinese Acad Sci, Guangzhou Inst Geochem, State Key Lab Organ Geochem SKLOG, Guangzhou 510640, Peoples R China
6.PetroChina Res Inst Petr Explorat & Dev, Beijing 100083, Peoples R China
First Author AffilicationKey Laboratory of Cenozoic Geology and Environment, Chinese Academy of Sciences
Corresponding Author AffilicationKey Laboratory of Cenozoic Geology and Environment, Chinese Academy of Sciences
Recommended Citation
GB/T 7714
Peng, Yanyan,Cai, Chunfang,Fang, Chenchen,et al. Diamondoids and thiadiamondoids generated from hydrothermal pyrolysis of crude oil and TSR experiments[J]. SCIENTIFIC REPORTS,2022,12(1):18.
APA Peng, Yanyan.,Cai, Chunfang.,Fang, Chenchen.,Wu, Liangliang.,Liu, Jinzhong.,...&Liu, Dawei.(2022).Diamondoids and thiadiamondoids generated from hydrothermal pyrolysis of crude oil and TSR experiments.SCIENTIFIC REPORTS,12(1),18.
MLA Peng, Yanyan,et al."Diamondoids and thiadiamondoids generated from hydrothermal pyrolysis of crude oil and TSR experiments".SCIENTIFIC REPORTS 12.1(2022):18.
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