西南石油大学学报(自然科学版)

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Seismic Attribute Analysis of Shallow-water Deltaic Sand Body Prediction

LIU Hao1, GUO Yishan2*, ZHAO Chunchen3, XIA Yueyang1   

  1. 1. School of Ocean Sciences,China University of Geosciences(Beijing),Haidian,Beijing 100083,China
    2. China National Offshore Oilfield Corporation Limited,Tanggu,Tianjin 300452,China
    3. Research Institute of Shaanxi Yanchang Petroleum(Group)Co. Ltd.,Xi′ an,Shaanxi 710075,China
  • Online:2016-08-01 Published:2016-08-01

Abstract:

The shallow-water deltaic sand body is excellent reservoir in Neogene strata of the Bohai Bay. However,as there is a
lack of well data in the new 3D seismic survey,the relation between the shallow-water deltaic sand bodies and seismic responses
is still obscure. It is difficult to depict the sand bodies precisely. In order to discuss the parasequence sand body distribution in
work area X in Huanghekou sag,this paper summarizes the relationship between the lithological combinations and the seismic
attributes in lower Minghuazhen submember ,based on the high-frequency sequences division. Using the seismic forward
modeling,the we establish the geophysical model of sand bodies and depicts the pss1 pss11 level sequence sand bodies of
Minghuazhen submember in a deliberate way,by making use of RMS amplitude attributes of 90? phase conversion seismic
data. The result proves the relationship between the amplitude of seismic profiles and sand body concentration. The high RMS
amplitude figure demonstrates the thick sand bodies(or the corresponding compound thick level). The middle amplitude figure
normally corresponds to massive mudstone clipping thick-middle thick sandstones,and low amplitude figure shows the barely
developed sand bodies. These results match noticeably with the well drilling s data. Therefore,it is feasible to predict the
shallow-water deltaic sand body by using the seismic attributes.

Key words: high-frequency sequence, seismic attributes, sand body depict, Huanghekou area, Neogene

CLC Number: