Characterisation of Shale Gas Reservoirs in the Uralik Formation, Western Margin of the Ordos Basin

Xin Cui; Ke Wang; Yanrong Zhang

doi:10.54097/d4r80977

Authors

Xin Cui
Ke Wang
Yanrong Zhang

DOI:

https://doi.org/10.54097/d4r80977

Keywords:

Uralik Formation; Reservoir Characteristics; Porosity; Ordos Basin; Shale.

Abstract

The Lower Paleozoic Ordovician at the western margin of the Ordos Basin is rich in natural gas resources, and the results of the gas test show that the mud shale and greywacke sections of the Uralik Formation have good oil and gas shows. Therefore, the study of reservoir characteristics and controlling factors of the Uralik Formation is of great significance for the exploration of natural gas in this formation. Based on the study of reservoir space type and physical characteristics of mud shale and greywacke in the Uralik Formation, this paper further investigates the reservoir control factors. The results show that the reservoir space of the Uralik Formation is mainly developed with cracks, pores and caves. The enrichment of shale gas requires the mud shale to have the dual properties of hydrocarbon production and storage, and the study of reservoir characteristics is to lay the foundation for the next step of enrichment and reservoir formation.

Downloads

Download data is not yet available.

References

ZHANG Jinchuan, JIN Zhijun,YUAN Mingsheng. Mechanism and distribution of shale gas formation[J]. Natural Gas Industry,2004(07).

Lei Y. Research on shale gas production dynamic analysis and production forecast[D]. China University of Petroleum (Beijing), 2016(04).

FU Locktang, FU Jinhua, XI Shengli, et al. 2021.Geological characteristics and exploration prospect of Ordos Basin Ordovician marine shale gas[J]. China Petroleum Exploration, 26 (2):33-44.

Feng Ziqi.2014.Characteristics and evaluation of shale reservoirs in the sea-land transition phase of the Shanxi Formation in the southeastern Ordos Basin[D]. Beijing:China University of Geosciences (Beijing).

Gao Z C, Luo Shunshe, He Y B, et al. 1995. Middle Ordovician isopycnal deposits along the western margin of the Ordos area [J]. Journal of Sedimentation, 13(4):16-26.

Guo X S. 2014. The law of "binary enrichment" of southern marine shale gas and practical understanding of shale gas exploration in the Longmaxi Formation in the Sichuan Basin and its periphery [J]. Journal of Geology, 88(7):1209-1218.

Li B. 2009. Lower Palaeozoic stratigraphy and petrographic paleogeography of the Ordos Basin [D]. Beijing:China University of Geosciences (Beijing).

Ma Wenxin, Liu Shugen, Huang Wenming, et al. 2012.Characteristics of Silurian reservoirs and prospects of unconventional gas exploration in Yudong, West Hubei [J]. Journal of Southwest Petroleum University (Natural Science Edition), 34(6):27-37.

Zou Cai Cai, Dong Dazhong, Wang Yuman, et al. 2015.China's Shale Gas Characteristics, Challenges and Prospects (I) [J]. Petroleum Exploration and Development, 42(6):689-701.

Yao Haipeng.2017.Research on the coupled mechanism of unconventional gas formation in the Late Paleozoic coal system in the northern Ordos Basin [D]. Beijing:China University of Mining and Technology.