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Application of pre-stack simultaneous inversion to predict gas-bearing dolomite reservoir: a case study from Sichuan Basin, China

  • Weiwei He
  • Jinjin HaoEmail author
  • Jinxiu Yang
  • Xu Guan
  • Ruixue Dai
  • Yufeng Li
Original Article
  • 5 Downloads

Abstract

Pre-stack simultaneous inversion is a seismic exploration technology which is widely applied to recognize lithology and detect oil and gas by analyzing the feature of amplitude variation versus offset (AVO). A gas-bearing reservoir can cause an obvious change in P-impedance and density. To effectively discriminate gas-bearing dolomite within Longwangmiao Fm. in Sichuan Basin of China, the pre-stack inversion method is employed by strict quality procedures. These procedures mainly include rock physics analysis, AVO modeling and pre-stack simultaneous inversion. Using the technology, P-impedance, S-impedance and density are obtained simultaneously. The distribution of gas-bearing dolomite is identified by P-impedance versus density cross-plotting from well data. The final prediction result indicates the existence of gas-bearing dolomite in the upper part of Longwangmiao Fm. in the study area, which is consistent with well data. Generally, pre-stack simultaneous inversion represents an effective method to predict gas-bearing dolomite reservoir and should be applicable in other study areas.

Keywords

Sichuan Basin Gas-bearing dolomite reservoir Rock physics Pre-stack simultaneous inversion 

Notes

Acknowledgements

This research is funded by the National Natural Science Foundation of China (no. 41406050) and Research Award Fund for Outstanding Young and Middle-aged Scientists of Shan-dong Province (BS2014HZ001). Thanks and appreciation goes to the colleagues involved in this research.

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Copyright information

© Springer-Verlag GmbH Germany, part of Springer Nature 2019

Authors and Affiliations

  • Weiwei He
    • 1
    • 2
  • Jinjin Hao
    • 1
    Email author
  • Jinxiu Yang
    • 3
  • Xu Guan
    • 4
  • Ruixue Dai
    • 4
  • Yufeng Li
    • 5
  1. 1.Northwest Branch InstitutePetrochina Research Institute of Petroleum Exploration and DevelopmentLanzhouChina
  2. 2.Research Center of Sichuan BasinPetrochina Research Institute of Petroleum Exploration and DevelopmentChengduChina
  3. 3.School of GeosciencesChina University of Petroleum (East China)QingdaoChina
  4. 4.Exploration and Development Research InstitutePetrochina Southwest Oil and Gas FieldChengduChina
  5. 5.School of Geophysics and Information TechnologyChina University of GeosciencesBeijingChina

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