Evolution and Hydrocarbon Accumulation of the Cambrian-Ordovician Paleo-uplifts in the Southwest Tarim Depression, China

Document Type : Research Paper

Authors

Division of Chemical, Polymer and Petrochemical Technology Development, Research Institue of Petroleum Industry, Tehran, Iran

10.22078/jpst.2021.4387.1709

Abstract

There is a close relationship between the evolution of the Cambrian–Ordovician paleo-uplifts and their hydrocarbon accumulation in the Southwest Tarim Depression. Using regional 2D seismic data interpretation, the structural morphology of the top of the Ordovician carbonate rocks in the Southwest Tarim Depression at different historical geologic stages is mapped. Combined with analysis of the discovered oil and gas reservoirs, the regularity of the hydrocarbon distribution in the Southwest Tarim Depression is investigated. Research shows that the evolution of the Cambrian-Ordovician paleo-uplifts in the Southwest Tarim Depression can be divided into four stages: (1) formation of the paleo-uplifts, (2) steady subsidence of the eastern paleo-uplift, (3) migration and adjustment of the western paleo-uplift and (4) strong subsidence and extinction of the paleo-uplifts. The Cambrian-Ordovician strata in the Southwest Tarim Depression experienced a seesaw-like structural reconstruction from an early north-dipping slope to a late south-dipping slope. During the structural reconstruction process, a pivot zone was located at the position of the current Maigaiti Slope, proving favorable for hydrocarbon accumulation and preservation. The fault zones in the eastern and western paleo-uplifts of the Maigaiti slope finalized during the Late Hercynian Period were favorable to preserving paleo-oil reservoirs. In contrast, the fault zones in the northern margin of the Maigaiti Slope, where the current tectonic uplift is located, were favorable for the accumulation of gas reservoirs.

Keywords


  1. Jia C Z (1997) Tectonic characteristics and petroleum, Tarim basin, China, Petroleum Industry Press, Beijing, 1-47.17 [in Chinese]. ##
  2. Li D S, Liang D G , Jia C Z (1996) Hydrocarbon accumulations in the Tarim basin, China, AAPG Bulletin, 80, 10: 1587-1603. ##
  3. Li D S (2012) Tectonics of Multi-cycle Superimposed Basins in China, Science Press, Beijing, 1-40.23 [in Chinese]. ##
  4. Levorsen A I, Berry A F (1967) Geology of petroleum. WH Freeman,San Francisco,1-70.34
  5. Perrodon A., Masse P. (1984) Subsidence, sedimentation and petroleum systems, Journal of Petroleum Geology 7, 1: 5-25. ##
  6. Magoon L B, Dow W G (1991) The petroleum system-from source to trap, AAPG Bulletin, 71-75. ##
  7. Kingston D. R., Dishroon C. P., Williams P A (1983) Global basin classification system, AAPG bulletin, 67, 12: 2175-2193. ##
  8. Carmalt S W, Moscariello A (2020) Environmental issues related to fracking, The Journal of World Energy Law and Business, 13, 5-6: 386-410. ##
  9. Jia C Z (1997) The tectonic characteristics and oil and gas in Tarim Basin, China [M]. Beijing: Petroleum Industry Press, 1-425. ##
  10. Chen J J, He D F, Sun F Y, (2019) Three-dimensional geological modeling of the Tabei paleo-uplift and discussion on related issues, Earth Science Frontiers, 26,1:121-133 [in Chinese with English abstract]. ##
  11. He B Z, Xu Z Q, Jiao C L (2011) Tectonic unconformities and their forming: Implication for hydrocarbon accumulations in Tarim basin, Acta Petrologica Sinica, 27,1:253-265. [in Chinese with English abstract]. ##
  12. Lü H T, Zhang Z P, Shao Z B, (2010) Structural evolution and exploration significance of the Early Paleozoic paleo-uplifts in Bachu-Maigaiti area, the Tarim Basin, Oil and Gas Geology, 31,1:76-83 . [in Chinese with English abstract]. ##
  13. Tian L, Zhang H Q, Liu J (2020) Distribution of Nanhua-Sinian rifts and proto-type basin evolution in southwestern Tarim Basin, NW China, Petroleum Exploration and Development, 47,6: 1206-1217. ##
  14. Cui H F, Tian L, Liu J (2017) Ordovician tectonic activities and oil and gas accumulation in the Southwest Depression of Tarim Basin , Oil geophysical prospecting, 52, 4: 834-840,850. [in Chinese with English abstract]. ##
  15. He D F, Zhou X Y, Yang H J (2008) Formation mechanism and tectonic types of intracraton paleouplifts in the Tarim basin, Earth Science Frontiers, 15, 2: 207-221. ##
  16. Jia C Z (1999) Structural characteristics and oil and gas accumulative regularity in Tarim Basin, Xinjiang Petroleum Geology, 20, 3:177-183[in Chinese with English abstract]. ##
  17. He D F,Jia C Z,Li D S, (2015) Formation and evolution of polycyclic superimposed Tarim Basin, Oil and gas Geology, 26, 1: 64-77. [in Chinese with English abstract]. ##
  18. Cui H F, Tian L, Zhang N C (2016) Fault activity characteristics and hydrocarbon significance in the northern margin of Maigaiti slope, Southwest Depression in the Tarim Basin, Natural Gas Industry, 36, 12: 35-44. [in Chinese with English abstract]. ##
  19. Zhao J Z, Wang Q H, Shi B H, (2007) Marine hydrocarbon enrichment rules and paleouplift-controlling hydrocarbon theory for the Paleozoic Tarim craton basin, Oil and Gas Geology, 28, 6: 703-712. [in Chinese with English abstract]. ##
  20. Qin S F, Jia C Z, Li M (2002) The difference on geochemical characteristics of natural gases between east and west part in Hetianhe gas field of Tarim basin and its origin, Petroleum Exploration and Development, 28, 5:16-18. [in Chinese with English abstract]. ##
  21. Zhou X Y, JIA C Z, WANG Z M (2002) Characteristics of carbonate gas pool and multistage gas pool formation history of Hetianhe gas field, Tarim basin, northwest China [J], Chinese Science Bulletin, 47, Suppl: 146-152. [in Chinese with English abstract]. ##
  22. Qin S F, LI M, DAI J X,Xiao Z Y,Zhang Q C (2005)Types of cracking gas in Hetianhe gas field in Tarim basin. Oil and Gas Geology, 26, 4: 455-460. [in Chinese with English abstract]. ##
  23. Pan W Q, Chen Y Q, Xiong Y X, (2015) Sedimentary Facies Research and Implications to Advantaged Exploration Regions on Lower Cambrian Source Rocks, Tarim Basin [, Natural Gas Geoscience, 26, 7: 1224-1232. [in Chinese with English abstract]. ##
  24. Xiong R, Zhou J G, Ni X F (2015) Distribution prediction of Lower Cambrian Yuertusi Formation source rocks and its significance to oil and gas exploration in the Tarim Basin, Natural Gas Industry, 35, 10: 56-63. [in Chinese with English abstract. ##]