Earth Science Frontiers ›› 2012, Vol. 19 ›› Issue (1): 221-227.

• Article • Previous Articles     Next Articles

 Pitfall in sedimentary interpretation using seismic attributes: An example from Dong2 member in East Depression, offshore area of Liaohe Basin.

  

  1. 1. College of Petroleum Engineering， Xi’an Shiyou University， Xi’an 710065， China 2. School of Energy Resources, China University of Geosciences（Beijing）， Beijing 100083， China 3. Petroleum Exploration and Production Research Institute, Sinopec， Beijing 100083， China 4. Geophysical Research Institute, Sinopec， Nanjing 210014， China
  • Received:2011-10-06 Revised:2011-12-01 Online:2012-01-10 Published:2012-01-10

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Abstract:

To better understand sedimentary types in the Dong2 member of offshore in the Liaohe Basin, through the research of modern river deposition and comprehensive analyses of cores, well logs, and seismic profiles, it was proved that the dominant facies in Dong2 member is characterized by shore shallow lacustrinebeachbar facies, instead of the fluvial facies deduced by seismic attributes slices. The key factor in interpreting ancient depositional environment is the concept of “preservation”. Migration and divagation often happened during the river evolution, so it is hard to preserve a complete river channel. Analyses of the sedimentary environments should follow the study order of core facieslogging faciesseismic facies, but not only based on seismic attributes.

Key words: seismic attributes, Dong 2 Member, fluvial sediment, beachbar, offshore

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