Petroleum enrichment characteristics in Ordovician carbonates in Lunnan area of Tarim Basin

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• 作者：Xiuxiang Lü (1) (2)
  Zhijun Jin (3)
  Xinyuan Zhou (1) (4)
  Ning Yang (1) (2)
  Qinghua Wang (4)
  Wenqing Pan (4)
  
• 关键词：Carbonates ; reservoir formation cycle ; petroleum accumulation in weathering crust ; Lunnan area ; Tarim Basin
• 刊名：Chinese Science Bulletin
• 出版年：2004
• 出版时间：December 2004
• 年：2004
• 卷：49
• 期：1-supp
• 页码：60-65
• 全文大小：502KB
• 参考文献：1. Lü Xiuxiang, Jin Zhijun, Pi Xuejun et al., Hydrocarbon accumulation and distribution in lower Paleozoic carbonates in Tarim Basin, Science in China, Series D, 2000, 43(5): 501-06. CrossRef
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  4. Zhou Xingxi, Discussion on network-like oil and gas pools in carbonate—an example from Ordovician burial hill reservoir in Lunnan area, Tarim Basin, Petroleum Exploration and Development (in Chinese), 2000, 27(3): 5-.
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  7. Zhao Mengjun, Huang Dipan, Correlation of the oils and source in Ordovician Tarim Basin, in Advances in Petroleum Geology in Tarim Basin (eds. Tong Xiaoguang, Liang Digang, Jia Chengzao) (in Chinese), Beijing: Science Press, 1996, 300-10.
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  11. Lü Xiuxiang, Jin Zhijun, Ma Yujie et al., Geological process reconstructing the Ordovician carbonate reservoir in Tarim Basin, in Formation Mechanism and Exploration Practice on the Subtle Reservoir (eds. Li Pilong, Pang Xiongqi) (in Chinese), Beijing: Petroleum Industry Press, 2004, 312-16.
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  13. Wang Jianbao, Guo Rutai, Xiao Xianming et al., Timing and phases of hydrocarbon migration and accumulation of the formation of oil and gas pools in Lunnan low uplift of Tarim Basin, Acta Sedimentologica Sinica (in Chinese), 2002, 20(2): 320-25.
  14. Lü Xiuxiang, Jin Zhijun, Distribution law of the carbonate oil-gas reservoir, Acta Petrolei Sinica (in Chinese), 2000, 21(3): 8-2.
  15. Gu Jiayu, Characteristics and evolutional model of karst reservoir of lower Ordovician carbonate rocks in Lunnan area of Tarim Bain, Journal of Palaeogeography (in Chinese), 1999, 1(1): 54-0.
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• 作者单位：Xiuxiang Lü (1) (2)
  Zhijun Jin (3)
  Xinyuan Zhou (1) (4)
  Ning Yang (1) (2)
  Qinghua Wang (4)
  Wenqing Pan (4)
  
  1. Basin & Reservoir Research Center, University of Petroleum, 102249, Beijing, China
  2. Key Laboratory for Petroleum Accumulation Mechanism, University of Petroleum, Ministry of Education, 102249, Beijing, China
  3. Petroleum Exploration & Production Research Institute of Sinopec, 100083, Beijing, China
  4. Tarim Oil Field Company, 841000, Kuerle, China
  
• ISSN：1861-9541

文摘

Lunnan heave had experienced denudation during late Caledonian and Hercynian movements and reconstruction during Indosinian movement. Lunnan heave and its circumference areas are located on the direction of petroleum migration, and experienced three reservoir formation cycles that are divided by wave cycle: The first reservoir formation cycle is characterized by breakage, the second by alteration, and the third by enrichment. Three layers of dissolving-cave developed on the vertical in Lunnan area. Development degree of slit-cave system and their connectivity are important factors to control petroleum enrichment in the weathering crust reservoir. The area where dissolving-caves are communicated by silts and faults was a fine petroleum enrichment area, and water was often encountered in the area with isolation cave while drilling because of no oil and gas origin. The top part of the faulted-horst as a leaking area is bearing water area, and the higher part of slope nearing the top part of the faulted-horst as a high seepage area is a heavy oil area due to lack of fine cap rock, and the lower part of slope and the platform are light and condensate oil area. The area with the middle-upper Ordovician is the favorable area to explore original carbonate reservoir formed in the earlier stage. The best favorable petroleum enrichment area for carbonates is surrounding Lunnan heave along the slope down to the direction of sags. The precondition to discover petroleum in carbonates is accurately prognosticating the distribution area of silts and caves, and the key to improving the exploration success ratio is accurately recognizing silts and small faults.