Journal of Jilin University(Earth Science Edition) ›› 2016, Vol. 46 ›› Issue (5): 1561-1570.doi: 10.13278/j.cnki.jjuese.201605304

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Channel Sand-Bodies of Putaohua Oil-Layer Seismic Description in Daqingzijing Area

Lian Xiaoliang1, Guo Bo1, Yan Qiaojie1, Jiang Zhongcheng1, Zhang Changsheng2   

  1. 1. Geologic Research Center of GRI, BGP, Zhuozhou 072751, Hebei, China;
    2. Research Institute of Petroleum Exploration and Development, Jilin Oilfield Company, PetroChina, Songyuan 138000, Jilin, China
  • Received:2016-05-27 Online:2016-09-26 Published:2016-09-26
  • Supported by:

    Supported by CNPC Geophysical Research Project (B3120741HT)

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Abstract:

Putaohua oil-layer out of Member 1st of Yaojia Formation in Daqingzijing area is constituted by delta-front and delta-plain sediments. The thin thickness reservoir sand and their rapidly lateral variation result in an insignificant seismic response; thereby it is difficult to do the reservoir prediction. In this paper, based on the well point and the integration technology of well and seismic data, the distribution of the channel sand bodies are identified by using the method of strata slice. By taking the advantage of seismic texture contrast and geostatistical inversion technique based on cloud transform in the delta front belts,the channel sand bodies, longitudinal wave impedance IP≤1.11×107 kg/(m2·s), and deep lateral resistivity RLLD≥15 Ω·m are finely described. Through a quantitative description of the boundary, strike and thickness in those target channel sand bodies that are narrow and small, the authors found that the coincidence rate attains to 83%. According to the results of reservoir prediction, the sand thickness figure in the study area is compiled. The overall strike of channel sand bodies in this area is southwest to northeast. And the provenance is from southwest. The oil and gas are mainly concentrated in the channel sand body of the central fault zone; the reservoir is a fault-lithological reservoir. The antithetic fault terrace zone is favorable for accumulation of oil and gas.

Key words: Putaohua oil-layer, strata slice, texture contrast, cloud transform, antithetic fault terrace

CLC Number: 

  • P631.4

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