Special Oil & Gas Reservoirs >

2024 , Vol. 31 >Issue 2: 19 - 27

DOI: https://doi.org/10.3969/j.issn.1006-6535.2024.02.003

Geologic Exploration

Cenozoic Uplift Processes and Hydrocarbon Accumulation Effects in the Yingxiongling Tectonic Belt in Qaidam Basin

  • Wei Xuebin ,
  • Ma Xinmin ,
  • Yang Mei ,
  • Sheng Jun ,
  • Wang Duo ,
  • Wei Wei ,
  • Shi Qi
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  • 1. Key Laboratory of Oil & Gas Geology of Plateau Saline Lacustrine Basin in Qinghai, Dunhuang, Gansu 736200, China;
    2. PetroChina Qinghai Oilfield Company, Dunhuang, Gansu 736200, China;
    3. Northwest Branch of China Petroleum Exploration and Production Research Institute, Lanzhou, Gansu 730000, China

Received date: 2023-02-23

  Revised date: 2024-01-10

  Online published: 2024-07-26

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Abstract

Yingxiongling Tectonic Belt is the largest positive tectonic unit within the Qaidam Basin, and the tectonic zone and its periphery are rich in oil and gas resources. To address the problems of unclear understanding of the geological structure of the tectonic belt, inconsistent understanding of the initial uplift time, and unclear formation process and mechanism, the following understandings were reached by means of tectonic analysis, tectonic evolution, tectonic simulation, and restoration of the burial and hydrocarbon history, based on the drilling wells and the continuous 3D seismic data, and by using the time as the main line, the tectonic activity period as the node, the main seismic section as the outline, and the specific tectonics as an item to reveal the 3D spatial structure and the formation process of the Yingxiongling Tectonic Belt from the geometrical and kinematical perspectives: Yingxiongling Tectonic Belt is characterized by spatial spreading of north-south zoning, east-west segmentation, and vertical up-and-down layering superposition; since the Cenozoic era, the tectonic zone has gone through three phases: Paleoproterozoic fault depression, the initial uplift in the early Neoproterozoic, and the late Neoproterozoic-Quaternary adjustment and stereotyping, and the evolution process has been characterized by the expansion from the south to the north and from the west to the east, and the tectonic evolution has been closely related with the hydrocarbon accumulation; the special boundary conditions of the basins, the internal structure, and the transformations of the stress field in the background of the uplift of the Tibetan Plateau can provide references for the establishment of the hydrocarbon accumulation model of Yingxiongling Tectonic Belt and the selection of a favorable direction of the next step of the exploration.

Key words： tectonic evolution; hydrocarbon accumulation model; basin-forming dynamics; Yingxiongling Tectonic Belt; Qaidam Basin

Cite this article

Wei Xuebin , Ma Xinmin , Yang Mei , Sheng Jun , Wang Duo , Wei Wei , Shi Qi . Cenozoic Uplift Processes and Hydrocarbon Accumulation Effects in the Yingxiongling Tectonic Belt in Qaidam Basin[J]. Special Oil & Gas Reservoirs, 2024 , 31(2) : 19 -27 . DOI: 10.3969/j.issn.1006-6535.2024.02.003

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