Oil & Gas Geology ›› 2001, Vol. 22 ›› Issue (2): 161-164.doi: 10.11743/ogg20010217

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DEPOSITIONAL SYSTEM AND SEQUENCE STRATIGRAPHY OF S33-4 SUBMEMBER IN DONGPU DPERESSION

Li Jian, Wang Deren, Bai Xingying   

  1. Research Institute of Exploration and Development, Zhongyuan Oilfield Compang, SINOPEC, Puyang, Henan
  • Received:2001-02-26 Online:2001-06-25 Published:2012-01-16

Abstract:

S33-4 submember of Dongpu Depression can be divided into two Ⅲ-grade sequences. Each of them consists of lowstand system tract, highstand system tract and lacustrine transgression-regression system tract. Low stand delta depositional system, lowstand fan depositional system and dry brine lake depositional system are mainly developed in the lowstand system tract. In the highstand system tract, highstand delta depositional system, highstand sublacustrine fanturbidite sand depositional system arid braided river depositional system-turdidite sand depositional system developed well. In the lacustrine transgression-regression system tract, lacustrine fan-delta depositional system, braided river depositional system, lacustrine transgression-regression delta depositional system and beach bar depositional system developed well. Low stand delta sand body and lowstand fan sand body are the most favorable ones for oil and gas exploration, and highstand delta sand body, highstand sublacustrine fan sand body, braided river sand body and fan-delta sand body are secondary.

Key words: S33-4 submember, Ⅲ-grade sequence, system tract, depositional system, sand body

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