Lithologic Reservoirs ›› 2014, Vol. 26 ›› Issue (6): 111-114.doi: 10.3969/j.issn.1673-8926.2014.06.018

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Application of matching pursuit wavelet decomposition and reconstruction technique to reservoir prediction and gas detection

CHEN Sheng， OUYANG Yongling， ZENG Qingcai， BAO Shihai， LI Xingyu， YANG Qing   

  1.  Research Institute of Petroleum Exploration and Development-Langfang ， Langfang 065007 ， Hebei ， China
  • Online:2014-11-20 Published:2014-11-20

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Abstract:

 The weathering crust karst reservoir in central Sichuan area is characterized by complex fracture-cavity system, strong heterogeneity and abnormal seismic reflection, which causes unobvious seismic response and AVO, and increases difficulties in reservoir perdition and gas detection. On the basis of matching pursuit algorithm, used wavelet decomposition and reconstruction technique to effectively eliminate the effect of mudstone, and then carried out reservoir prediction and gas detection, achieving good results. Wavelet decomposition and reconstruction technique can be used to decompose seismic data into wavelet with different shapes, frequency and energy, and then reconstruct wavelet reasonably, with higher resolution in both time domain and frequency domain. This study provides a new idea and method for complex reservoir prediction with strong reflection and gas detection.

Key words: rock, pore volume , porosity , compressibility , bulkvolume , pore pressure

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