Lithologic Reservoirs ›› 2021, Vol. 33 ›› Issue (1): 248-257.doi: 10.12108/yxyqc.20210123

• EXPLORATION TECHNOLOGY • Previous Articles     Next Articles

Prediction of high-quality source rock distribution based on pseudo-3D multi-attribute inversion

YAO Jun, LE Xingfu, CHEN Juan, SU Wang, ZHANG Yongfeng   

  1. PetroChina Research Institute of Petroleum Exploration and Development-Northwest, Lanzhou 730020, China
  • Received:2019-12-30 Revised:2020-05-05 Online:2021-02-01 Published:2021-01-25

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Abstract: The Xujiahe Formation in the transitional zone of central-western Sichuan Basin is a typical "sandwich" structure,with source and reservoir being stacked vertically. The effective prediction of high-quality source rock distribution is one of the major determinants of tight gas exploration in this formation. Based on the measured value of core TOC,conventional logging curves,multiple linear regression algorithm was applied to calculate TOC curve of single well,a pseudo-three dimensional seismic network was built with two-dimensional seismic data,and then multi-attribute inversion and data selection were carried out to complete the distribution prediction of high-quality source rocks in the first,third and fifth members of Xujiahe Formation. The method improves the utilization of two-dimensional seismic data,enhances the accuracy of prediction results of highquality source rock distribution,and improves the calculation efficiency of multi-attribute inversion. The application of pseudo-3D multi-attribute inversion to the effective prediction of high-quality source rock distribution lays a solid foundation for the further exploration of tight gas in the two-dimensional seismic deployment area.

Key words: high-quality source rock, TOC content, pseudo-3D, multi-attribute inversion, Xujiahe Formation

CLC Number: 

  • P631.4
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