Lithologic Reservoirs ›› 2013, Vol. 25 ›› Issue (6): 62-66.doi: 10.3969/j.issn.1673-8926.2013.06.011

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Identification of Jurassic lithologic traps in Fudong slope area, eastern Junggar Basin

WANG Junhuai1， WU Junjun1， YIN Changxia2， WU Tao 1，3， BIAN Baoli1   

  1. 1. Research Institute of Exploration and Development， PetroChina Xinjiang Oilfield Company， Karamay 834000， China； 2. Power Supply Company， PetroChina Xinjiang Oilfield Company， Karamay 834000， China； 3. Key Laboratory of Petroleum Resources Research， Institute of Geology and Geophysics， Chinese Academy of Sciences， Lanzhou 730000， China
  • Online:2013-11-26 Published:2013-11-26

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Abstract:

Based on the theory and method of seismic sedimentology, according to the channel sands of Jurassic Toutunhe Formation in Fudong slope area of Junggar Basin, this paper carried out identification of lithologic traps and investigation of new technology by comprehensive use of seismic attributes analysis technology, coherence analysis technology, frequency spectrum decomposition technology, 3D visualization and full 3D cube seismic interpretation technology. Because the characterization of lithologic target by single seismic attribute has stronger multiplicity, so multi-attributes analysis was applied to decrease multiple solutions and increase forecasting precision. By mutual verification of these multi-attributes, forecasting precision was improved and exploration risk was reduced. The channel sands of the study area were identified by using various new seismic interpretation technologies, displaying spacial distribution characteristics of sands clearly from many aspects, and many lithologic objects were identified. Through many years of exploration, lots of lithologic reservoirs were found, such as Fudong 2, Fudong 5 and Fudong 16 reservoir. This study can provide a new thinking and new exploration objects type for lithologic reservoir exploration in Junggar Basin.

Key words: low permeability reservoirs, varying conductivity, attenuation coefficient, fracture conductivity, productivity model

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