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HU Shu-yi, WEN Ling, TIAN Hai-qin. Study of the high resolution sequence stratigraphy of Sha-4 member in Wei-81 fault block,Weicheng oil field[J]. Northwestern Geology, 2002, 35(2): 46-54.
Citation: HU Shu-yi, WEN Ling, TIAN Hai-qin. Study of the high resolution sequence stratigraphy of Sha-4 member in Wei-81 fault block,Weicheng oil field[J]. Northwestern Geology, 2002, 35(2): 46-54.

Study of the high resolution sequence stratigraphy of Sha-4 member in Wei-81 fault block,Weicheng oil field

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  • Received Date: June 26, 2001
  • Revised Date: September 28, 2001
  • Published Date: June 04, 2002
  • Based on the systematical analysis of drilling, logging data and palaeontology, using continental facies sequence stratigraphy, the high resolution stratig raphic sequence of Sha-4 member in Wai-81 f ault block, Weicheng oil field, was studied. On the basis of the lithological characteristics, tectonic evolution, palaeontology and logging, the Sha-4 member was divided into: 1 three order sequence, 2 systemt racts, 4 parasequencesets, 18 parasequence. The lower Sha-4 member consists of lowstand system tract which mainly developed flood flow depositionract, and upper Sha-4 member consists of trangressive system tract which mainly developed delta deposition tract. The source rocks are the dark grey mudstone of the upper Sha-4 member, and the reservoir is lake delta facies from upper Sha-4 and f lood flow deposition tract from lower Sha-4 member.
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