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The genesis of gas condensates and light oilsin the lower paleozoic of Tarim Basin, NW China: The exploration implications for untra-deep petroleum
  • 2024-01-08
元数据
名   称 The genesis of gas condensates and light oilsin the lower paleozoic of Tarim Basin, NW China: The exploration implications for untra-deep petroleum
科技资源标识 CSTR:11738.14.NCDC.XDA14.PP4354.2024
DOI 10.1016/j.petrol.2022.111032
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摘   要 Almost 8 × 108 tons marine condensate reserveshave been estimated to be present in the Paleozoic to Cenozoic
reservoirs of the Tarim Basin. Thethermal maturity of condensate gases are estimated to be greater than 2.2%REo
(vitrinite reflectance equivalent),which are higher than the calculated maturity of thecondensates <1.9%REo
.
Therefore, the formation of gas-condensates might include a mixture of later cracked gases with earlieroil accumulations.
The mixture model indicates that the relative content of oil-cracking gases varies from 42% to 98%
in condensate gases, and the mixing extent of kerogen and oil cracking gas with various maturities could also
lead to the carbon isotope reversal of methane and ethane. The positive correlation between the gas-oil ratio
(GOR) of gas condensates and the maturity of cracking gas shows that the cracking gas is much more enriched in
the eastern Tabei uplift of the northern Tarim Basin thanthe Tazhong uplift ofcentral Tarim Basin. The relative
abundance of the triaromatic dinosteranes in the condensates coincides with the feature of hydrocarbons derived
from Cambrian source rocks Furthermore, based on the multi-stagethermal maturity of the Cambrian source
rocks, the formation mechanism of secondary gas condensates has been demonstrated and reconstructed. Recent
exploration discoveries in the ultra-deep Cambrian of the Tabei and Tazhong uplifts, involving ZS-1 and LT-
1wells, confirmed the cracking gases were derived from the post-high mature Manjar Depression and that
liquid hydrocarbons could be maintained in the ultra-deep of Tabei uplift. The findings are helpful toestimate the
exploration potential of the deeper cracking gases in the high-temperature and high-pressurereservoirs of the
Tarim Basin.
学科分类
170.50
关键词
Reversal of methane and ethane Adamantanes Secondary gas condensates Cracking gas Deep exploration
作者 Jin Su,Haijun Yang,Xiaomei Wang,Yongquan Chen,Yu Fang,Haizu Zhang,Chunlong Yang,Ke Zhang,Sihong Ma,Caiyun Wei
数据量 21.2 MiB
论文类型： journal
论文网址： https://doi.org/10.1016/j.petrol.2022.111032
期刊名称： Journal of Petroleum Science and Engineering
出版时间： 2022-12-01
引用和标注
数据引用
Jin Su,Haijun Yang,Xiaomei Wang,Yongquan Chen,Yu Fang,Haizu Zhang,Chunlong Yang,Ke Zhang,Sihong Ma,Caiyun Wei. The genesis of gas condensates and light oilsin the lower paleozoic of Tarim Basin, NW China: The exploration implications for untra-deep petroleum. 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.PP4354.2024.
Jin Su,Haijun Yang,Xiaomei Wang,Yongquan Chen,Yu Fang,Haizu Zhang,Chunlong Yang,Ke Zhang,Sihong Ma,Caiyun Wei. The genesis of gas condensates and light oilsin the lower paleozoic of Tarim Basin, NW China: The exploration implications for untra-deep petroleum. 国家冰川冻土沙漠科学数据中心(http://www.ncdc.ac.cn), 2024. https://www.doi.org/10.1016/j.petrol.2022.111032.
许可协议
知识共享许可协议   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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