Lithologic Reservoirs ›› 2016, Vol. 28 ›› Issue (3): 127-132.doi: 10.3969/j.issn.1673-8926.2016.03.017

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Application of forward modeling to study of sand body connectivity in X well field of Bohai Oilfield

Zhang Jingsi， Chuai Yuanyuan， Bian Li’en   

  1. Bohai Oilfield Research Institute ，Tianjin Branch of CNOOC Company Ltd. ，Tianjin 300452 ，China
  • Online:2016-05-20 Published:2016-05-20

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Abstract: Restricted by seismic data quality and influenced by the sedimentary characteristics of braided facies, it is difficult to identify the sand body connectivity of upper Guantao Formation of Neogene in X well field through conventional seismic attribute analysis and 90-degree phase conversion technique. This paper used forward modeling to distinguish the sand body connectivity in the study area. First of all, based on the drilling data and seismic data,this paper built different geologic models according to the sand body sedimentary characteristics of the upper Guantao Formation in X well field, and carried out forward modeling; then analyzed the seismic response characteristics of the models, discussed the influence of sand body lateral connectivity on seismic reflection characteristics,and compared with the actual seismic waveform to confirm the connectivity and the boundary of the main sand bodies in the upper Guantao Formation; finally verified the reliability of the forward modeling by the drilling data.The results show that the forward modeling can realize high precision simulations of geological model, and can effectively solve the multi-solution problem of sand body connectivity as a supplementary means. This technology has a certain value on extension and application for the research on sand body connectivity in exploration stage.

Key words: CO2 flooding, fluid heterogeneity, composite reservoir, pressure transient model, curve analysis

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