Pore Characteristics of Lacustrine Shale Oil Reservoir in the Cretaceous Qingshankou Formation of the Songliao Basin, NE China

Xiaomeng Cao, Yuan Gao, Jingwei Cui, Shuangbiao Han, Lei Kang, Sha Song and Chengshan Wang
Additional contact information
Xiaomeng Cao: State Key Laboratory of Biogeology and Environmental Geology, China University of Geosciences, Beijing 100083, China
Yuan Gao: State Key Laboratory of Biogeology and Environmental Geology, China University of Geosciences, Beijing 100083, China
Jingwei Cui: Research Institute of Petroleum Exploration and Development, PetroChina, Beijing 100083, China
Shuangbiao Han: College of Geoscience and Surveying Engineering, China University of Mining and Technology, Beijing 100083, China
Lei Kang: State Key Laboratory of Biogeology and Environmental Geology, China University of Geosciences, Beijing 100083, China
Sha Song: Geological Engineering and Geomatics, Chang’an University, Xi’an 710054, China
Chengshan Wang: State Key Laboratory of Biogeology and Environmental Geology, China University of Geosciences, Beijing 100083, China

Energies, 2020, vol. 13, issue 8, 1-25

Abstract: Shale oil is hosted in nanopores of organic-rich shales, so pore characteristics are significant for shale oil accumulation. Here we analyzed pore characteristics of 39 lacustrine shale samples of the Late Cretaceous Qingshankou Formation (K 2 qn) in the Songliao Basin, which is one of the main shale oil resource basins in China, using field emission-scanning electron microscopy (FE-SEM), and low-pressure nitrogen adsorption. We accomplished fractal analysis, correlation analysis using correlation matrix and multidimensional scaling (MDS), and prediction of fractal dimensions, which is the first time to predict pore fractal dimensions of shales. Interparticle pores are highly developed in K 2 qn. These shales have mesoporous nature and slit-shaped pores. Compared with the second and third members (K 2 qn 2,3 ), the first member of the Qingshankou Formation (K 2 qn 1 ) has a larger average pore diameter, much smaller surface area, fewer micropores, simpler pore structure and surface indicated by smaller fractal dimensions. In terms of pore characteristics, K 2 qn 1 is better than K 2 qn 2,3 as a shale oil reservoir. When compared with marine Bakken Formation shales, lacustrine shales of the Qingshankou Formation have similar complexity of pore structure, but much rougher pore surface. This research can lead to an improved understanding of the pore system of lacustrine shales.

Keywords: pore characteristics; fractal dimension; multidimensional scaling (MDS); lacustrine; shale oil (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2020
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (4)

Downloads: (external link)
https://www.mdpi.com/1996-1073/13/8/2027/pdf (application/pdf)
https://www.mdpi.com/1996-1073/13/8/2027/ (text/html)

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:gam:jeners:v:13:y:2020:i:8:p:2027-:d:347445

Access Statistics for this article

Energies is currently edited by Ms. Agatha Cao

More articles in Energies from MDPI
Bibliographic data for series maintained by MDPI Indexing Manager ().