Lithologic Reservoirs ›› 2017, Vol. 29 ›› Issue (5): 120-126.doi: 10.3969/j.issn.1673-8926.2017.05.014

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AVO response of different types of gas-bearing sandstone and error analysis of approximate formulas

WANG Xiujiao, HUANG Jiaqiang, JIANG Ren, ZENG Qingcai   

  1. Department of Geophysical Exploration Technology, PetroChina Research Institute of Petroleum Exploration and Development, Beijing 100083, China
  • Received:2016-12-08 Revised:2017-02-07 Online:2017-09-21 Published:2017-09-21

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Abstract: Based on three common approximate formulas including Aki-Richards,Shuey and Hilterman in AVO inversion technology and four types of gas-bearing sandstone,three approximate formulas were calculated for AVO response in comparing with Zoeppritz exact value. Both relative error and incident angle curves were plotted. The results show that Aki-Richards and Shuey approximate formulas own lower approximate errors than that of Hilterman approximate formula for the interface of four class gas-bearing sandstone. The accuracy of Shuey formula rises with the increase of the incident angle. Under different reservoir conditions, three approximate formulas' calculation results possess different percentage errors and curve characteristics, and all approximate formulas are more applicable for the third type AVO response. Quantitative analysis result which is calculated by three approximate formulas in four types gas-bearing sandstones provides beneficial theoretical foundation for reservoir parameter inversion.

Key words: beach-controlled karst, dolomite reservoirs, reservoirs classification, permeability modeling, Longwangmiao Formation, Sichuan Basin

CLC Number: 

  • P631.4
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