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    Volume 44 Issue 8
    Aug.  2019
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    Article Navigation >  Earth Science  > 2019  >  44(8): 2619-2626
    Deng Yong, Liu Shiyou, Li Yangsen, Li Fang, Zhou Fan, Fu Chen, 2019. Application of Time-Frequency Analysis Technology in Evaluation of Channel in Ledong Area. Earth Science, 44(8): 2619-2626. doi: 10.3799/dqkx.2019.141
    Citation: Deng Yong, Liu Shiyou, Li Yangsen, Li Fang, Zhou Fan, Fu Chen, 2019. Application of Time-Frequency Analysis Technology in Evaluation of Channel in Ledong Area. Earth Science, 44(8): 2619-2626. doi: 10.3799/dqkx.2019.141
    shu

    Application of Time-Frequency Analysis Technology in Evaluation of Channel in Ledong Area

    doi: 10.3799/dqkx.2019.141

    • Zhanjiang Branch of China National Offshore Oil Corporation Ltd., Zhanjiang 524057, China

    • Received Date: 2019-01-30
    • Publish Date: 2019-08-15
      Abstract
    • With the continuous progress of exploration,it has become a new development trend to find favorable oil and gas reservoir with weak amplitude reflection. In order to confirm the geological significance of weak amplitude reflection,the simulation of variable porosity has been carried out in Ledong (LD) area in this study,revealing the energy of seismic reflection decreases gradually with the increasing of sandstone porosity. It is confirmed in LD area that the weak amplitude may also be a sign of favorable reservoir. Combined with sedimentary rhythm,different models are established and the time-frequency spectrum is extracted. It is found that directionality of time-frequency characteristics is related to sedimentary association of strata,and the weak amplitude of the channel in LD area is similar to the time-frequency characteristics of the positive cyclic strata. There is a high probability that the weak amplitude in the channel is thick sandstone,which is confirmed by the drilling,showing that the technique is reliable. This study provides important guidance for deep oil and gas exploration and drilling target optimization in LD area.

       

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