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《Petroleum Exploration and Development》 2005-06
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Wavelet packet energy characteristic identification of water flooded layer

WANG Ren-yi~(1,2)(1.China University of Geosciences,Hubei 430074,China;2.Research Institute of Exploration & Development,PetroChina Tuha Oilfield Company,Xinjiang 839009,China)  
The petroliferous information is disclosed by the acoustic time and resistivity logs.The energy characteristic of wavelet packet varies greatly with different swept extent,and the wavelet packet energy is an exponential decline curve along with frequency augmentation without reference to water flooded extent.Along with water flooded extent increasing,the wavelet packet energy is declining in evidence.The energy in some frequency components shows great difference for different water flooded types.The energy of the swept layer and water layer are absorbed,while the energy of oil and weak water flooded are increased.The wavelet packet energy characteristic method based on the log signal could well identify the lowly resistive oil layer,highly resistive swept layer and water layer,which are done poorly by the conventional log explanation theory.
【CateGory Index】: P631.8
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