Lithologic Reservoirs ›› 2025, Vol. 37 ›› Issue (5): 22-33.doi: 10.12108/yxyqc.20250503

• PETROLEUM EXPLORATION • Previous Articles    

Oil and gas exploration history and drilling enlightenment of Yin’e Basin

CUI Haifeng1, HAN Xiaofeng1, HUANG Yuanyi2, ZHANG Huiyuan1   

  1. 1. Xi'an Geological Survey Center of China Geological Survey, Xi'an 710119, China;
    2. BGP Inc., CNPC, Zhuozhou 072751, Hebei, China
  • Received:2025-03-24 Revised:2025-05-06 Published:2025-09-06

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Abstract: Yin’e Basin exhibits relative low degree of hydrocarbon exploration，and the distribution law and exploration direction of oil and gas require further clarification. By analyzing the oil and gas exploration history of Yin’e Basin，the exploration progress and existing problems in different stages were sorted out，the drilling understanding was summarized，and the reservoir types and exploration direction were clarified. The results show that：（1）Yin’e Basin has experienced four exploration stages：reconnaissance，comprehensive evaluation，key depression exploration and overall understanding. Taking Cretaceous-Jurassic and Carboniferous-Permian as the target layers，as the research of oil and gas accumulation conditions in the basin gradually deepen，and great progress has been made.（2）During the stage of reconnaissance，gravity-magnetic，electrical，and seismic were applied to delineate the distribution range of key sags and deployed two-dimensional seismic. In the stage of comprehensive evaluation，taking Mesozoic as the target layer，the tectonic units of the basin were divided，and the low-yield oil flow was discovered in Chagan and Lujing sags according to the high-point hydrocarbon-controlling model of fault structure. In the stage of key depression exploration，taking Mesozoic and Upper Paleozoic as the target layers，and the industrial oil and gas flows were achieved in Hari Sag，Guaizihu Sag and Tiancao Sag. However，debates persist on whether oil-producing series belong to Mesozoic or Late Paleozoic. In the stage of overall understanding the basin and the re-division of tectonic units，the current structure of the basin were clarified. It was pointed out that Carboniferous-Permian was the fold basement of the Mesozoic faulted basin，and hydrocarbon accumulation models of Mesozoic lithologic reservoir and pre-Mesozoic buried hill were established. The oil and gas are mainly distributed in small-scale area of the lower part of each Mesozoic dustpan-shaped faulted gentle slope，and the resources are relatively scattered.（3）Yin’e Basin is a Mesozoic faulted basin developed on the folded basement of the Hercynian orogenic belt. The main oil and gas producing strata and oil and gas sources are Mesozoic，and Upper Paleozoic has experienced different degree of deformation and metamorphism，with limited hydrocarbon potential. The unconventional oil and gas reservoirs，such as thick lacustrine mudstone and argillaceous shale in Mesozoic Cretaceous and Jurassic are the key targets for next-phase exploration of the basin.

Key words: exploration history, faulted basin, buried hill oil reservoir, dustpan-shaped faulted gentle slope, unconventional oil and gas reservoirs, Upper Paleozoic, Mesozoic, Yin’e Basin

CLC Number: 

  • TE121.3
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