Lithologic Reservoirs ›› 2021, Vol. 33 ›› Issue (1): 239-247.doi: 10.12108/yxyqc.20210122

• EXPLORATION TECHNOLOGY • Previous Articles     Next Articles

Prediction technology of tight oil thin sand reservoir and its application effect: a case study of Lower Cretaceous Quantou Formation in Aonan block,Songliao Basin

CAO Sijia1, SUN Zengjiu2, DANG Huqiang2, CAO Shuai3, LIU Dongmin2, HU Shaohua2   

  1. 1. College of Earth Sciences, Northeast Petroleum University, Daqing 163318, Heilongjiang, China;
    2. Geological Research Center of Research Institute, Bureau of Geophysical Prospecting Inc., CNPC, Zhuozhou 072750, Hebei, China;
    3. College of Earth Sciences and Resources, China University of Geosciences(Beijing), Beijing 100083, China
  • Received:2020-07-01 Revised:2020-09-20 Online:2021-02-01 Published:2021-01-25

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Abstract: Aonan block,located in northern Songliao Basin,is an important resource potential area of tight oil in China. The Lower Cretaceous Quantou Formation is distributary channel sand deposit of shallow-water delta front,which is characterized by "mud-coated sand",thin thickness and small scale. Conventional seismic prediction technologies such as seismic inversion cannot accurately identify and predict this type of sand body. The blue filter target processing technology was used to improve the quality and resolution of seismic data. The optimization and analysis of sensitive seismic attributes were carried out to predict the macroscopic distribution characteristics of thin sand body qualitatively. The thin sand body was predicted quantitatively by combining the technique of well-seismic joint geostatistical inversion and stochastic co-simulation,and then the spatial distribution of sand body in the main layer of Fuyu oil layer was described. The predicted results are in good agreement with the drilling results. This method has important guiding significance for tight oil and gas development in other areas.

Key words: tight oil, thin reservoir prediction, seismic attributes, geostatistical inversion, blue filter, Fuyu oil layer, Songliao Basin

CLC Number: 

  • TE122
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