西南石油大学学报(自然科学版)

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Channel Sand Distribution Prediction Based on Seismic Forward
Modeling and Attribute Analysis Technology

Cao Qingrong, Li Pei, Tong Minbo, Yu Ruoyu   

  1. Research Institute of Shaanxi Yanchang Petroleum(Group)Co.,Ltd,Xi’an,Shaanxi 710075,China
  • Online:2013-08-01 Published:2013-08-01

Abstract:

The Fourth Quan Member in R zone well slope belt of south Songliao Basin is ultra-low permeability reservoir,
which is buried deep and is of poor physical property,thin sand body and quick horizontal changes. Its superior Reservoir of
good quality is located in the principal part of the river. The effective signals of sand reservoirs I is shielded due to the influence
of strong impedance interface of T2 at the Fourth Quan Member,so it is more difficult to predict the reservoir. Through
seismic forward modeling of different surrounding rock combinations and different thickness of sand body,we discovered the
correlation between the Fourth Quan Member channel sand bodies and attributes of seismic reflection amplitude,frequency
and so on. Based on the theory of seismic sedimentology,and by combining well and seismic,we reinterpreted the sand body
enveloping surface. The distribution rule of channel sand body reservoirs is predicted by the sensitive attributes,which has
been optimized by the best correlation with thickness variation of channel sand body. The method has higher practical value for
thin and anisotropic reservoir prediction.

Key words: channel sand, seismic forward modeling, seismic sedimentology, seismic attributes, reservoir prediction