西南石油大学学报(自然科学版)

• 地质勘探 •    下一篇

潍北凹陷孔店组烃源岩地化特征及油源对比

宋来亮1 *,刘华2,徐昊清1,李振升2,王鑫2   

  1. 1. 中国石化胜利油田分公司勘探开发研究院,山东东营257015
    2. 中国石油大学(华东)地球科学与技术学院,山东青岛266580
  • 出版日期:2016-04-11 发布日期:2016-04-11
  • 通讯作者: 宋来亮,E-mail:songlailiang.slyt@sinopec.com
  • 基金资助:

    国家科技重大专项(2016ZX05006 003)。

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

摘要:

为了明确潍北凹陷有效烃源岩的分布及其所生成油气的分布规律,利用饱和烃色谱、色谱质谱等地化测试
技术对孔店组烃源岩的地化特征和源藏空间对应关系进行了分析。研究表明,潍北凹陷发育孔二上、中、下3 个段有
效烃源岩并分布于北部洼陷带和南部次洼两个沉积中心,其中孔二上烃源岩有机质丰度最高,品质最好,其次为孔二
中烃源岩,是研究区的主力烃源岩;孔二上、孔二中两套烃源岩在伽马蜡烷含量、姥植比和成熟度等指标上存在明显的
差异。油源对比结果表明,已发现的孔一段、孔二上亚段的原油主要来源于北部洼陷带的孔二上亚段烃源岩,孔二中
亚段原油和孔三段原油来源于北部洼陷带孔二中亚段烃源岩,孔二下亚段烃源岩所生成的原油多为近源成藏。

关键词: 潍北凹陷, 孔店组, 烃源岩, 生物标志化合物, 油源对比

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

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