›› 2016, Vol. 37 ›› Issue (4): 1-1.doi: 10.7657/XJPG20160406

   

Controlling Effects of Ordovician Karst Paleogeomorphology on Reservoirs in Tahe Oilfield,Tarim Basin

HAN Changcheng1, LIN Chengyan1, LU Xinbian2, WEI Ting3, REN Lihua1, ZHANG Xianguo1   

  1. (1.School of Geosciences, China University of Petroleum, Qingdao, Shandong 266580, China; 2.Northwest Oilfield Company,Sinopec, Urumqi, Xinjiang 830011, China; 3.Shixi Oilfield Operation District, Xinjiang Oilfield Company, PetroChina,Karamay, Xinjiang 834000, China)
  • Online:2019-01-01 Published:1905-07-15

Abstract: Using the data of core, thin section, drilling, logging and seismic profile, the mark of palaeokarst identification is analyzed; the Ordovician karst palaeogeomorphology is restored with impression method and residual thickness method combined with unconformity structures; karst paleogeomorphic units are classified and their controlling effects on reservoirs are analyzed. In the 4 secondary paleogeomorphic units such as karst highland, karst gentle?slope, karst steep?slope and karst basin, 4 tertiary paleogeomorphic units (monadnock, tableland, level terrace and clough) are further classified quantitatively. The favorable areas for karst reservoir development are monadnocks and tablelands in the karst gentle?slope, the ends and flanks of the clough, and the tablelands and level terraces in the karst steep?slope

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