Three-dimensional discrete element numerical simulation of Paleogene salt structures in the western Kuqa foreland thrust belt

被引：0
|
作者：
Li J. [1 ,2 ]
Zhang Y. [1 ,2 ]
Wang H. [1 ,2 ]
Wang D. [1 ,2 ]
机构：
[1] The Key Laboratory of Orogenic Belts and Crustal Evolution, School of Earth and Space Sciences, Peking University, Beijing
[2] Institute of Oil and Gas, Peking University, Beijing
来源：
Shiyou Kantan Yu Kaifa/Petroleum Exploration and Development | 2020年 / 47卷 / 01期
关键词：
Foreland thrust belt; Formation mechanism; Kuqa Depression; Salt structure; Tarim Basin; Three-dimensional discrete element numerical simulation;
D O I：
10.11698/PED.2020.01.06
中图分类号：
学科分类号：
摘要：
Taking the Paleogene salt strata in the west of Kuqa foreland thrust belt as study object, the deformation features of salt structure in the compression direction and perpendicular to the compression direction were examined to find out the control factors and formation mechanisms of the salt structures. By using the three-dimensional discrete element numerical simulation method, the formation mechanisms of typical salt structures of western Kuqa foreland thrust belt in Keshen and Dabei work area were comprehensively analyzed. The simulation results show that the salt structure deformation of Keshen and Dabei work areas is piggyback type, with deformation concentrated in the piedmont zone; early uplift near the compression end basement, pre-existing basement faults, synsedimentary process and the initial depocenter of the salt rock affect the formation of the salt structure; in the direction perpendicular to the compression direction, the salt rock near the compression end has stronger lateral mobility and velocity component moving towards the middle part, the closer to the middle, the bigger the velocity will be, so the salt rock will aggregate towards the middle and deform intensely, forming complex folds and separation of salt structure from salt source, and local outcrop out of ground with thrust fault. Compared with 2D simulation, 3D simulation can analyze the salt structure in the principal stress direction and direction perpendicular to the principal stress, give us a full view of the formation mechanisms of salt structure, and guide the exploration of oil and gas reservoirs related to salt structures. © 2020, The Editorial Board of Petroleum Exploration and Development. All right reserved.
引用
收藏
页码：65 / 76
页数：11
相关论文
共 37 条
  • [1] He D., Li D., He J., Et al., Comparison in petroleum geology between Kuqa depression and Southwest depression in Tarim Basin and its exploration significance, Acta Petrolei Sinica, 34, 2, pp. 201-218, (2013)
  • [2] Wang X., Tang P., Xie H., Et al., Cenozoic salt structures and evolution in the western Kuqa depression, Tarim Basin, China, Geotectonina et Metallogenia, 33, 1, pp. 57-65, (2009)
  • [3] Tang L., Li J., Yu Y., Et al., Differential salt tectonic deformation and segmentation of the Kuqa foreland fold-thrust belt, Tarim Basin, northwest China, Acta Geologica Sinica, 80, 3, pp. 313-320, (2006)
  • [4] Chen S., Tang L., Jia C., Et al., Salt tectonics in the western Kuqa Depression and its relation to oil and gas distribution, Acta Petrolei Sinica, 25, 1, pp. 30-34, (2004)
  • [5] Li Y., Hou G., Hari K.R., Et al., The model of fracture development in the faulted folds: The role of folding and faulting, Marine and Petroleum Geology, 89, pp. 243-251, (2018)
  • [6] Yu Y., Ma B., Tang L., Et al., Major factors controlling salt structures in western Kuqa Depression, Tarim Basin, Petroleum Exploration and Development, 35, 1, pp. 23-27, (2008)
  • [7] Li S., Xin W., John S., Compressional salt tectonics and synkinematic strata of the western Kuqa foreland basin, southern Tian Shan, China, Basin Research, 24, 4, pp. 475-497, (2012)
  • [8] Yin H., Wang Z., Wang X., Et al., Characteristics and mechanics of Cenozoic salt-Related structures in Kuqa foreland basins: Insights from physical modeling and discussion, Geological Journal of China Universities, 17, 2, pp. 308-317, (2011)
  • [9] Wang X., Wang Z., Xie H., Et al., Cenozoic salt tectonics and physical models in the Kuqa depression of Tarim Basin China, SCIENCE CHINA Earth Science, 40, 12, pp. 1655-1668, (2010)
  • [10] Li W., Li J., Wang H., Et al., Deformation mechanisms of Kelasu tectonic belt in Kuqa foreland thrust belt: Insight from discrete element numerical simulation, Geotectonica et Metallogenia, 41, 6, pp. 1001-1010, (2017)
1234