Lithologic Reservoirs >

2014 , Vol. 26 >Issue 4: 1 - 8

DOI: https://doi.org/10.3969/j.issn.1673-8926.2014.04.001

Study on depositional system and sequence framework of Wenchang Formation in Panyu 4 depression of the Pearl River Mouth Basin

  • ZHU Shifa ,
  • XU Liming ,
  • ZHU Xiaomin ,
  • LIANG Xiaowei ,
  • LI Panpan ,
  • NIU Xiaobing
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  • 1. College of Geosciences， Yangtze University， Wuhan 430100， China； 2. College of Geosciences， China University of Petroleum， Beijing 102249， China； 3. Research Institute of Shenzhen Branch， CNOOC， Guangzhou 510240, China

Online published: 2014-08-15

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Abstract

Under the guidance of sequence stratigrapy and sedimentology, Wenchang Formation in Panyu 4 depression is subdivided into six third-order sequences based on the features of seismic reflection termination, and the distribution of sequence is significantly controlled by fault activity. The seismic facies, including high-amplitude and high-continuity wedge facies, hummocky facies, progradation facies, have been recognized based on the seismic internal reflection configuration and external shape. Controlled by basin texture and fault activity of Panyu 4 depression, wedge-seismic facies is mainly distributed in the downthrow side of boundary fault in the eastern depression, and progradation-seismic facies is mainly distributed in the gentle slope of the western depression. The distribution of seismic facies of Wenchang Formation is asymmetry in the plane and stongly inherited in the vertival profile. Large-scale coarse-grained nearshore subaqueous fans developed in the downthrow side of boundary fault of the eastern Panyu 4 depression were supplied by Dongsha uplift, and the medium-small scale and multi-type deltas came fromthe west and southside of western gentle slope．

Key words：  diagenesis; tight reservoir; Yanchang Formation; Longdong area; Ordos Basin

Cite this article

ZHU Shifa , XU Liming , ZHU Xiaomin , LIANG Xiaowei , LI Panpan , NIU Xiaobing . Study on depositional system and sequence framework of Wenchang Formation in Panyu 4 depression of the Pearl River Mouth Basin[J]. Lithologic Reservoirs, 2014 , 26(4) : 1 -8 . DOI: 10.3969/j.issn.1673-8926.2014.04.001

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