Visualization of Shale Oil Occurrence Characteristics and Analysis of Main Controlling Factors Within Microdomains: Insights from Raman Mapping Combined with AFM

被引:0
|
作者
Jia, Lidan [1 ,2 ]
Gao, Zhiye [1 ,2 ]
Zheng, Guowei [3 ]
Yang, Zhi [4 ]
Li, Zi-Bo [5 ,6 ]
Jiang, Zhenxue [1 ,2 ]
Wei, Weihang [1 ,2 ]
Ma, Guoming [1 ,2 ]
Zhang, Lulu [1 ,2 ]
Xin, Haotian [1 ,2 ]
Liu, Zhaochen [1 ,2 ]
Bai, Lixun [1 ,2 ]
Yang, Adou [1 ,2 ]
机构
[1] China Univ Petr, State Key Lab Petr Resources & Engn, Beijing 102249, Peoples R China
[2] China Univ Petr, Unconvent Petr Res Inst, Beijing 102249, Peoples R China
[3] Shanxi Yanchang Petr Grp Co v, Res Inst, Xian 710065, Peoples R China
[4] Petro China, Res Inst Petr Explorat & Dev, Beijing 100083, Peoples R China
[5] Chinese Acad Sci, Nanjing Inst Geol & Palaeontol, State Key Lab Palaeobiol & Stratig, 39 East Beijing Rd, Nanjing 210008, Peoples R China
[6] Chinese Acad Sci, Ctr Excellence Life & Palaeoenvironment, 39 East Beijing Rd, Nanjing 210008, Peoples R China
关键词
THERMAL MATURITY; PORE STRUCTURE; JUNGGAR BASIN; WETTABILITY; SPECTROSCOPY; ENRICHMENT; RECOVERY; CALCITE; SYSTEM; COAL;
D O I
10.1021/acs.energyfuels.4c04094
中图分类号
TE [石油、天然气工业]; TK [能源与动力工程];
学科分类号
0807 ; 0820 ;
摘要
It is of great significance to visually investigate the occurrence characteristics and controlled factors of shale oil within microdomains to determine its migration and production. However, a significant gap exists in visually investigating the intricate interplay between shale oil, mineral composition and pore structure, which has hindered shale oil production. To address this gap, this study used Raman mapping to intuitively analyze the occurrence characteristics of shale oil and applied Raman mapping combined with atomic force microscopy (AFM) to investigate the interrelationship between shale oil occurrence characteristics, mineral compositions and pore structure of the Permian Fengcheng Formation in the Mahu Sag of the Junggar Basin. The results show that the occurrence of shale oil can be divided into four types. More specifically, microdomains with high total organic carbon (TOC) content and developed pores are most favorable for shale oil occurrence, whereas microdomains with high TOC content and migration pathways are relatively unfavorable. Microdomains with high TOC content and undeveloped pores are unfavorable for shale oil occurrence, whereas microdomains with low TOC content and undeveloped pores are the most unfavorable. The shale oil content was positively correlated with the carbonate, feldspar, pyrite, and reedmergnerite contents. Conversely, the shale oil content was negatively correlated with the quartz content. Furthermore, the AFM phase peaks at the interiors of the elliptical- and slit-shaped pores positively shifted by 11.1% and 54.4% more than at the interface, respectively. The interiors of slit- and elliptical-shaped pores always showed a higher shale oil Raman signal than the exteriors of these pores, both of which indicate that these two types of pores are favorable for shale oil occurrence. These findings improve our understanding of the key factors influencing the oil-bearing properties and occurrence characteristics of shale oil within microdomains and provide a new analytical perspective for the effective exploitation of shale oil.
引用
收藏
页码:22833 / 22847
页数:15
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