Comparative Study of Tectonic Evolution and Oil–Gas Accumulation in the Ri-Qing-Wei Basin and the Jiaolai Basin

Yue Zhang, Yaoqi Zhou, Tengfei Zhou, Yang Chen, Sunyi Li, Yuehan Shang, Hongyu Mu, Bingyang Bai, Hao Gao, Anyu Jing, Yang Gao and Guojie Yang
Additional contact information
Yue Zhang: School of Geoscience and Technology, China University of Petroleum, Qingdao 266580, China
Yaoqi Zhou: School of Geoscience and Technology, China University of Petroleum, Qingdao 266580, China
Tengfei Zhou: School of Geoscience and Technology, China University of Petroleum, Qingdao 266580, China
Yang Chen: School of Geoscience and Technology, China University of Petroleum, Qingdao 266580, China
Sunyi Li: School of Geoscience and Technology, China University of Petroleum, Qingdao 266580, China
Yuehan Shang: School of Geoscience and Technology, China University of Petroleum, Qingdao 266580, China
Hongyu Mu: School of Geoscience and Technology, China University of Petroleum, Qingdao 266580, China
Bingyang Bai: School of Geoscience and Technology, China University of Petroleum, Qingdao 266580, China
Hao Gao: School of Geoscience and Technology, China University of Petroleum, Qingdao 266580, China
Anyu Jing: Exploration and Development Research Institute, Shengli Oilfield Company, Sinopec, Dongying 257015, China
Yang Gao: Exploration and Development Research Institute, Shengli Oilfield Company, Sinopec, Dongying 257015, China
Guojie Yang: Exploration and Development Research Institute, Shengli Oilfield Company, Sinopec, Dongying 257015, China

Energies, 2022, vol. 15, issue 15, 1-17

Abstract: The Ri-Qing-Wei basin is located in the central Sulu Orogeny on the eastern side of the Tanlu fault zone in eastern Shandong province. To the north, the Jiaonan uplift separates it from the Jiaolai basin, where drilling in the lower Cretaceous sedimentary rock of the Laiyang group has indicated good oil and gas reserves. Drilling in the Ri-Qing-Wei basin, in contrast, is in the preliminary exploration stage. Lingke 1, the only scientific well, is on Lingshan Island on the basin boundary, and it encountered a large set of source rocks 700 m thick. The two basins were comprehensively compared and analyzed based on comprehensive fieldwork, drilling, core data, seismic profiling, sedimentary filling sequence, tectonic evolution history, basin burial history, geothermal history, and geochemical characteristics of the source rocks. The results showed three things: (1) from the late Jurassic to the early Cretaceous (the Laiyang period), subduction of the paleo-Pacific plate under the Eurasian plate delaminated the lithospheric mantle of the Sulu Orogeny, thus forming a series of passive continental rift basins. Of these, the Ri-Qing-Wei is central and the Jiaolai is its branch. After the active rift stage in the Qingshan period and the depression stage in the Wangshi period, the burial depth of the source rocks in the Ri-Qing-Wei basin was up to 6000 m, while the maximum burial depth in the Jiaolai basin was about 3000 m. The paleogeotemperature of both basins exceeded 125 °C, indicating that the source rocks were very mature. (2) A comprehensive comparison of their geochemical characteristics—organic matter abundance, type, and maturity—showed that both basins have oil-generating potential. It is worth noting that the magmatic activity in the Qingshan period had a positive effect on the evolution of the source rocks but was not the key factor: burial depth was. (3) Oil and gas failed to accumulate in the Jiaolai basin because they were destroyed by the lateral tectonic activities. During the right-lateral strike-slip stage (50 ± 5 Ma) during the late Wangshi, the Jiaolai basin was strongly uplifted over a range of more than 1000 m by the Tanlu and Wulian-Mouji fault zones along the boundary. The Wangshi group, as a cap rock, was eroded, and oil and gas overflowed along the fault that reached the surface. The late Wangshi period uplift of the Ri-Qing-Wei basin was less than 1000 m because the source rock was deeper, and the reverse faults in the basin were sealed well. The uplift did little damage to the oil in the Ri-Qing-Wei basin. Above all, tectonic evolution was the main controlling factor of oil accumulation in the study area, and the layers of the Laiyang group in the Ri-Qing-Wei basin have oil and gas potential, making it a prospective target for unconventional offshore oil and gas exploration.

Keywords: Ri-Qing-Wei basin; Jiaolai basin; tectonic evolution; source rocks; oil–gas accumulation condition (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: 2022
References: View complete reference list from CitEc
Citations: View citations in EconPapers (1)

Downloads: (external link)
https://www.mdpi.com/1996-1073/15/15/5322/pdf (application/pdf)
https://www.mdpi.com/1996-1073/15/15/5322/ (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:15:y:2022:i:15:p:5322-:d:869111

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 ().