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Volume 12 Issue 1
Mar 2001
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Fengjun Nie, Sitian Li, Hua Wang, Xinong Xie, Keqiang Wu, Meizhu Jiang. Study on Sequence Stratigraphy of Zhujiang and Zhuhai Formations, Zhu Ⅲ Subbasin, Pearl River Mouth Basin, South China Sea. Journal of Earth Science, 2001, 12(1): 11-21.
Citation: Fengjun Nie, Sitian Li, Hua Wang, Xinong Xie, Keqiang Wu, Meizhu Jiang. Study on Sequence Stratigraphy of Zhujiang and Zhuhai Formations, Zhu Ⅲ Subbasin, Pearl River Mouth Basin, South China Sea. Journal of Earth Science, 2001, 12(1): 11-21.

Study on Sequence Stratigraphy of Zhujiang and Zhuhai Formations, Zhu Ⅲ Subbasin, Pearl River Mouth Basin, South China Sea

Funds:

the National Natural Science Foundation of China 49732005-01

  • Received Date: 04 Dec 2000
  • Accepted Date: 12 Feb 2001
  • The early Miocene in the Zhu III subbasin, the Pearl River Mouth basin, includes two formations-Zhujiang and Zhuhai. There are 8 third-order sequences, S1, S2, S3, S4, S5, S6, S7 and S8 from the bottom of Zhuhai to the top of Zhujiang in these two formations. There are only one transgressive systems tract (TST) and one highstand systems tract (HST) in each sequence because the whole Zhu III subbasin was located updip the shelf break during sequence deposition. The boundaries and maximum flooding surfaces (mfs) are in good response to both gamma and acoustic log curves in the study area. In seismic profile 1249, sediments obviously onlap over the unconformity (SB0., the bottom of Zhuhai Fm), SB1 and SB2, but obviously over only SB2 in seismic profile 1283 since the well-developed faults in the subbasin. The sand bodies with high porosity and permeability for petroleum migration and accumulation had been reworked by tidal currents before their burial. Hence, the tidal influenced parasequence sets occur both in TST and HST. Through detailed analysis, the sand bodies in TST are more favorable for petroleum to migrate and accumulate than those in HST.

     

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