Lithologic Reservoirs ›› 2009, Vol. 21 ›› Issue (2): 94-98.doi: 10.3969/j.issn.1673-8926.2009.02.019

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Feasibility analysis of reservoir prediction in Sulige Gasfield

LIU Weihua，GAO Jianhu，CHEN Qiyan，DONG Xuehua   

  1. Research Institute of Petroleum Exploration & Development-Northwest， PetroChina， Lanzhou 730020， China
  • Online:2009-06-16 Published:2009-06-16

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Abstract:

The study area is located in Sulige Gasfield. The reservoir gas-bearing sand is close to shale in density, Pwave velocity and impedance. So, it is difficult to divide gas-bearing sand from shale using conventional reservoir prediction methods. Based on well logging data, combined with rock physics analysis, elastic impedance analysis and AVO analysis, the studies on reservoir prediction and fluid identification in Sulige Gasfield are carried out. The results show that the elastic physical parameters can be used to distinguish sand from shale and determine the gas-bearing sensitive parameter. Elastic impedance of different angles can be used not only to divide sand from shale, but also to distinguish gas-bearing formation fromnon-gas-bearing formation. AVOattributes can be used to determine whether He 8 member is gas-bearing sandstone, but can not be used to predict whether it is commercial gas. These studies provide foundation for reservoir prediction and fluid identification.

Key words: meandering river, point bar, lateral accretion, description

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