Characteristics of light hydrocarbons under the superimposed influence of biodegradation and subsequent thermal maturation
文献类型：期刊论文
| 作者 | Huang, Yueyi2,3,4; Liao, Yuhong2,3,4; Xu, Tao1; Wang, Yunpeng2,3,4; Peng, Ping'an2,3,4 |
| 刊名 | ORGANIC GEOCHEMISTRY
 |
| 出版日期 | 2023 |
| 卷号 | 177页码:104557 |
| 关键词 | PALEOZOIC MARINE PETROLEUM THERMOCHEMICAL SULFATE REDUCTION CARBON-ISOTOPE FRACTIONATION SOUTHWESTERN BARENTS SEA INDIVIDUAL N-ALKANES OIL-OIL CORRELATION TARIM BASIN DEEP SUBSURFACE STABLE CARBON LIAOHE BASIN |
| ISSN号 | 0146-6380 |
| DOI | 10.1016/j.orggeochem.2023.104557 |
| 英文摘要 | Recently, several large light oil and condensate reservoirs were discovered in the Tarim and Junggar basins (China). In these superimposed petroliferous basins, the early formed palaeo-oil reservoirs experienced complex tectonic movements, resulting in complex secondary alterations (e.g., biodegradation and water washing), known to alter the chemical composition of crude oils. Thus, crude oils previously modified by biodegradation exhibit significantly different generation potential, chemical composition, and timing of generation (in terms of light oils/condensates), during subsequent thermal alteration. To elucidate the influence of biodegradation on crude oil cracking (to form light hydrocarbons), we artificially matured four crude oils of the same origin (with varying degrees of biodegradation) to various maturity levels, using programmed-temperature gold tube closed-system pyrolysis. The yields, molecular parameters, and stable carbon isotope ratios of the light hydrocarbon products derived from the matured oils were analysed and compared. The preferential removal of n-alkanes and branched alkanes during biodegradation significantly reduced the generation potential of light hydrocarbons. Under the superimposed influence of biodegradation and subsequent thermal alteration, referred to as superimposed secondary alteration (SSA), a few hydrocarbon ratios used for oil–oil correlations were severely modified. Most maturity-related light hydrocarbon parameters of the pyrolysis products derived from the biodegraded oils achieved maximum values at a lower maturity (Easy%Ro) than that observed for non-biodegraded crude oil. At 0.5–1.4 Easy%Ro, SSA caused the depletion of 13C in most light hydrocarbons, due to an increased sourcing from the biodegradation-resistant fractions of the oil. Such carbon isotopic differences decreased with increasing maturity. ? 2023 Elsevier Ltd |
| WOS研究方向 | Geochemistry & Geophysics |
| 语种 | 英语 |
| WOS记录号 | WOS:000929172100001 |
| 源URL | [http://ir.gig.ac.cn/handle/344008/80335]  |
| 专题 | 有机地球化学国家重点实验室 |
| 作者单位 | 1.School of Petroleum, China University of Petroleum (Beijing) at Karamay, Karamay; 834000, China 2.University of Chinese Academy of Sciences, Yuquan Road, Beijing; 100049, China 3.CAS Center for Excellence in Deep Earth Science, Guangzhou; 510640, China 4.State Key Laboratory of Organic Geochemistry, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou; 510640, China |
| 推荐引用方式 GB/T 7714 | Huang, Yueyi,Liao, Yuhong,Xu, Tao,et al. Characteristics of light hydrocarbons under the superimposed influence of biodegradation and subsequent thermal maturation[J]. ORGANIC GEOCHEMISTRY,2023,177:104557. |
| APA | Huang, Yueyi,Liao, Yuhong,Xu, Tao,Wang, Yunpeng,&Peng, Ping'an.(2023).Characteristics of light hydrocarbons under the superimposed influence of biodegradation and subsequent thermal maturation.ORGANIC GEOCHEMISTRY,177,104557. |
| MLA | Huang, Yueyi,et al."Characteristics of light hydrocarbons under the superimposed influence of biodegradation and subsequent thermal maturation".ORGANIC GEOCHEMISTRY 177(2023):104557. |
入库方式： OAI收割
来源：广州地球化学研究所
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