Journal of Jilin University(Earth Science Edition) ›› 2020, Vol. 50 ›› Issue (3): 911-918.doi: 10.13278/j.cnki.jjuese.20190031

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Improvement and Application of Pickett Plot for Well Logging Interpretation of Argillaceous Formation

Ding Lei, Zhang Hengrong, Yuan Wei, Zheng Zhifeng, Wang Yi   

  1. Zhanjiang Branch of CNOOC Ltd., Zhanjiang 524057, Guangdong, China
  • Received:2019-02-21 Online:2020-05-26 Published:2020-05-29
  • Supported by:
    Supported by Science and Technology Program of CNOOC (China) Co., Ltd (Y219R006.02.08)

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Abstract: The regular Pickett plot is derived from Archie formula, which is not suitable for the evaluation of argillaceous formation in the west of the South China Sea. The authors modified the regular Pickett plot based on the Indonesian formula, developed a new Pickett plot for argillaceous formations, and proposed a method for calculating water resistivity and geoelectric parameters accurately by iteration. The study shows that the formation water resistivity calculated by the improved Pickett plot of argillaceous sandstone is consistent with that calculated by pure water layer. In comparison with the empirical value, water resistivity and geoelectric parameters obtained by the iterative method are more consistent with the actual situation.

Key words: Pickett plot, argillaceous formation, Indonesian formula, water saturation, reservoirs

CLC Number: 

  • TE19
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