西南石油大学学报(自然科学版)

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Geochemical Characteristics of Hydrocarbon Source Rocks and#br# Oil-source Correlation of Kongdian Formation,Weibei Depression

SONG Lailiang1*, LIU Hua2, XU Haoqing1, LI Zhensheng2, WANG Xin2   

  1. 1. Exploration and Development Research Institute,Shengli Oilfield Company,SINOPEC,Dongying,Shandong 257015,China
    2. School of Geosciences,China University of Petroleum,Qingdao,Shandong 266580,China
  • Online:2016-04-11 Published:2016-04-11

Abstract:

In order to identify distribution of effective source rocks and oil-gas generated by the effective source rocks in
Weibei Depression,some geochemical testing technologies,such as saturated hydrocarbon chromatography and chromatography–
mass spectrometry,are used to analyze the geochemical characteristic of source rocks in Kongdian Formation and space
corresponding relation of source-pool. Studies show that source rocks in Kongdian Formation are the important source of oil
and gas,with highest abundance of organic matter and best quality in upper 2nd member of Kongdian Formation,followed by
central and lower 2nd member of Kongdian Formation. Among each member of Kongdian Formation exist significant differences
in gammacerane content,ratio of pristine/ phytane and maturity. Oil-source correlation shows that crude oil found in
superficial layer (1st member of Kongdian Formation,upper 2nd member of Kongdian Formation) come from source rocks of
upper 2nd member of Kongdian Formation in northern sag,and that crude oil in central 2nd member of Kongdian Formation or
3rd member of Kongdian Formation come from source rocks of central 2nd member of Kongdian Formation in northern sag,
and oil generated by lower 2nd member of Kongdian Formation mainly accumulate near the source rocks.

Key words: Weibei Depression, Kongdian Formation, source rocks, biomarker, oil-source correlation

CLC Number: