Li Fengjie, Chen Ronglin. STUDY ON THE MIDDLE-LOWER PERMIAN SEQUENCE STRATIGRAPHY IN NORTHEASTERN AREA, THE SICHUAN BASIN[J]. PETROLEUM GEOLOGY & EXPERIMENT, 2008, 30(5): 472-477. doi: 10.11781/sysydz200805472
Citation: Li Fengjie, Chen Ronglin. STUDY ON THE MIDDLE-LOWER PERMIAN SEQUENCE STRATIGRAPHY IN NORTHEASTERN AREA, THE SICHUAN BASIN[J]. PETROLEUM GEOLOGY & EXPERIMENT, 2008, 30(5): 472-477. doi: 10.11781/sysydz200805472

STUDY ON THE MIDDLE-LOWER PERMIAN SEQUENCE STRATIGRAPHY IN NORTHEASTERN AREA, THE SICHUAN BASIN

doi: 10.11781/sysydz200805472
  • Received Date: 2008-03-06
  • Rev Recd Date: 2008-09-15
  • Publish Date: 2008-09-28
  • On the basis of sequence stratigraphic theory and the analysis of sedimentary facies,lithology and lithofacies and change of accommodation of field profile,the Middle-Lower Permian sequences stratigraphy at Yanggudong profile in Dukou town,Xuanhan County,Northeastern of the Sichuan Basin were studied.Three types,six stratigraphic sequence boundaries were discriminated.One grade Ⅱ sequence and five grade Ⅲ sequences in Middle-Lower Permian,one grade Ⅲ sequence in Liangshan Formation,two grade Ⅲ sequences in Qixia Formation and two grade Ⅲ sequences in Maokou Formation were determined.In grade Ⅱ sequence,strand swamp facies was mainly developed in lowstand systems tract,restraint platform facies or carbonate gentle slope facies in transgressive systems tract and open platform facies mainly in highstand systems tract.At the same time sequence stratigraphic framework of the Middle-Lower Permian was built.By the comparison of the change of accommodation curve and outcrop stratigraphic sequence curve,there was a very well corresponding relation between the two curves,which implied the correct of classification of the sequence stratigraphy.

     

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