国家冰川冻土沙漠科学数据中心

元数据

名称	Generation, expulsion and accumulation of diamondoids, aromatic components and gaseous hydrocarbons for gas fields in Kuqa Depression of the Tarim Basin, NW China [塔里木盆地库车坳陷凝析油中金刚烷和芳烃化合物的生成、运移和聚集过程]
科技资源标识	CSTR:11738.14.NCDC.XDA14.PP5711.2024
DOI	10.1016/j.marpetgeo.2022.105893
数据共享方式	开放下载
摘要	Diamondoids and thermally stable aromatic components are the major components that form in source rocks at post mature stage (gas window). To date, the linkage among these two type components and gaseous hydro- carbons has been rarely documented in processes of generation and expulsion from source rocks and accumu- lation to oil/gas reservoirs. To investigate this issue, quantitative GC, GC-MS and GC-IRMS analyses were performed on twenty-nine concdensate samples from gas fields in the Kuqa Depression of the Tarim Basin, northwestern China. These samples have higher concentrations of 4- + 3-methyldiamantanes (4+3MD) in the range of 42–2757 ppm and moderate concentrations of C29 ααα 20R sterane in the range of 2.4–179 ppm, demonstrating that the reservoirs for these samples were initially charged by normal oils at maturities within oil generative window, and then by gas from deep post mature source rocks. Concentrations of 4+3MD in liquid components that were carried by the later gas charges can be up to 10000 ppm or even higher, suggesting that diamondoids were generated in higher amounts with higher expulsion efficiency from the deep post mature source rocks. Diamondoid ratios, such as MAI, DMAI-1, DMAI-2, TMAI-1, TMAI-2, MDI, EAI, DMDI-1 and DMAI- 2 vary in wide ranges and have close positive correlations between each other and with dryness ratios (C1/ΣC1-4) of gaseous hydrocarbons, demonstrating that these ratios are effective maturity parameters and diamondoids for the studied samples mainly formed within a wide maturity range at gas window (%Ro 1.5–3.5). Concentrations of 4 + 3MD have positive correlations with diamondoid maturity ratios, dryness ratios (C1/ΣC1-4) of gaseous hydrocarbons and concentrations of thermally stable aromatic components, such as biphenyl (BP), naphthalene (Na), phenanthrene (Phen), dibenzothiophene (DBT) and chrysene (Ch), demonstrating that diamondoids and thermally stable aromatic components as well as gaseous hydrocarbons were consistently generated and expelled in increasing amounts from the deep post mature source rocks with increasing maturities, and then migrated along faults to sallower reservoirs where the initially charged oils remain uncracked at present.
学科分类	170.50
关键词	Diamondoid concentrations maturity ratios Concentrations of aromatic components Late chargingKuqa Depression
作者	Wenyu Huang
数据量	15.7 MiB
论文类型：	journal
论文网址：	https://doi.org/10.1016/j.marpetgeo.2022.105893
期刊名称：	Mrine and Petroleum Geology
出版时间：	2022-11-01

引用和标注

数据引用

Wenyu Huang. Generation, expulsion and accumulation of diamondoids, aromatic components and gaseous hydrocarbons for gas fields in Kuqa Depression of the Tarim Basin, NW China [塔里木盆地库车坳陷凝析油中金刚烷和芳烃化合物的生成、运移和聚集过程]. 国家冰川冻土沙漠科学数据中心(http://www.ncdc.ac.cn), 2024. https://cstr.cn/CSTR:11738.14.NCDC.XDA14.PP5711.2024.

许可协议

本作品采用知识共享署名 4.0 国际许可协议进行许可。

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项目信息详情

项目名称：深层油气形成与分布预测
项目编号：XDA14010000
项目类别：中国科学院战略性先导科技专项（A类）