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Natural Gas Geoscience ›› 2023, Vol. 34 ›› Issue (2): 349-358.doi: 10.11764/j.issn.1672-1926.2022.10.013

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Origin of siliceous mudstone in Permian Dalong Formation and its influence on compressibility， northeastern Sichuan Basin

Fei LI(),Zhujiang LIU,Feiran CHEN,Fubin WEI,Jincai GUO,Zexin SU   

  1. SINOPEC Exploration Company，Chengdu 610041，China
  • Received:2022-08-02 Revised:2022-10-23 Online:2023-02-10 Published:2023-03-06
  • Supported by:
    The National Natural Science Foundation of China： Enterprise Innovation and Development Joint Project(U19B6003-03-03)

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Key words: Northeastern Sichuan Basin, Dalong Formation, Siliceous origin, Compressibility, Biogenesis

CLC Number: 

  • TE122.1

Fig.1

Location map of Nanjiang area in northeastern Sichuan"

Fig.2

Sedimentary facies distribution map of the Dalong Formation in northeastern Sichuan"

Fig.3

Comprehensive histogram of the Dalong Formation in Well Leba 1"

Fig.4

The naming scheme of mudstone lithofacies in the Dalong Formation in northeastern Sichuan"

Fig.5

Histogram of TOC， porosity and gas content of different lithofacies in the Dalong Formation mudstone in Well Leba 1， northeastern Sichuan"

Fig.6

Argon ion scanning photos of different lithofacies in the Dalong Formation of Well Leba 1 in northeastern Sichuan"

Fig.7

Pore size distribution of different lithofacies mudstones in the Dalong Formation of Well Leba 1 in northeastern Sichuan"

Fig.8

TOC-siliceous and Al2O3-siliceous map of the Dalong Formation mudstone in Well Leba 1， northeastern Sichuan"

Fig.9

Thin-section and SEM photos of the Dalong Formation in Well Leba 1， northeastern Sichuan"

Fig.10

Al-Fe-Mn triangle diagram of mudstone of Dalong Formation in Well Leba 1 in northeastern Sichuan"

Fig.11

Characteristics of Si isotope in mudsone of Dalong Formation in Well Leba 1， northeastern Sichuan"

Fig.12

Compressive strength of mudstone in Dalong"

Fig.13

Poisson's ratio of mudstone in Dalong"

Fig.14

Elastic modulus of mudstone in Dalong"

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