Oil & Gas Geology ›› 2005, Vol. 26 ›› Issue (5): 694-697.doi: 10.11743/ogg20050522

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Progressive development of subtle lithologic reservoirs in Wang 68 wellblock of Niuzhuang oifleild

Wang Guangfu, Zhan Chunguang   

  1. Exploration and Production Research Institute, SINOPEC, Beijing
  • Received:2005-07-10 Online:2005-10-25 Published:2012-01-16

Abstract:

Through analyzing the characteristics of strata,structure,reservoir and oil pool of the middle 3rd member of Shahejie formation(Es3) in Wang 68 wellblock of Niuzhuang oilfield,it is believed that the middle Es3 sandbodies both in Wang 68 wellblock and in the adjacent Niu 20 wellblock are fluxoturbidites deposited in semi-deep and deep lacustrine environment.The sandbodies are in the same horizons;the thickness,lithology and layering characteristics are correlatable;and the reservoirs in both wellblocks are of lithologic subtle types.Wang 68 and Niu 20 wellblocks are respectively located on both sides of Niuzhuang-1 fault.Therefore,the deposition of the middle Es3 sandbodies in Wang 68 wellblock on the footwall would not be controlled by Niu-zhuang-1 fault.The development experiences in Niu 20 wellblock are used to guide the progressive development in Wang 68 wellblock,achieving proved oil reserves of 3.05 million tons and oil production capacity of 35,000 tons.

Key words: fluxoturbidite, low permeability reservoir, subtle lithologic reservoir, progressive development, Niuzhuang oilfield

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