Lithologic Reservoirs ›› 2007, Vol. 19 ›› Issue (4): 82-86.doi: 10.3969/j.issn.1673-8926.2007.04.014

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Fine stratigraphic classification and correlation of Chang 3 reservoir of Yanchang Formation in Zhenbei Oilfield

ZHU Xiaoyan1, LI Aiqin2, DUAN Xiaochen1, TIAN Suiliang1, LIU Meirong1   

  1. 1. No. 2 Oil Production Plant, Changqing Oilfield Company, PetroChina, Changqing 745100, China;
    2. Research Institute of Petroleum Exploration and Development, Changqing Oilfield Company,PetroChina, Changqing 710021, China
  • Online:2007-12-15 Published:2007-12-15

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Abstract:

Based on well logs and core data, the characteristics of the rock-electric property of more than 100 wells are analyzed. The fine stratigraphic classification and correlation of Chang 3 reservoir in Zhenbei Oilfield are carried out. From top to bottom, Chang 3 can be divided into Chang 311, Chang 312, Chang 313, Chang 321, Chang 322, Chang 323, Chang 331, Chang 332 and Chang 333. Among them, Chang  322 and Chang 331 are underwater distributary channel deposits, and with sand bodies developed well, they become the dominated reservoirs in the study area. The fine classification and correlation can provide geologic basic data for the study on sedimentary microfacies, sand body distribution, reservoir heterogeneity and favorable target prediction, which takes a significant part in the oilfield development.

Key words: stratigraphic-lithologic reservoirs, exploration, Bayindulan Sag, Wuliyasitai Sag, Jiergalangtu Sag, Saihantala Sag

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