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束鹿凹陷中部古近系沙河街组第三段下部层序特征

Stratigraphic sequence features in lower part of the third member of Shahejie formation in the middle part of Shulu sag

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【作者】 旷红伟覃汉生刘俊奇王吉茂

【Author】 Kuang Hongwei et al (Key Laboratory of Exploration Technologies of Oil and Gas Resource, Ministry of Education, Yangtze University,Jingzhou ,Hubei, 434023)

【机构】 油气资源与勘探技术教育部重点实验室(长江大学)中国石油华北油田分公司勘探开发研究院中国石油华北油田分公司勘探开发研究院 湖北荆州 434023 长江大学地球物理与石油资源学院

【摘要】 通过岩心观察、薄片鉴定、地化分析,钻井地层层位划分与对比、地震层位标定和追踪等项工作的研究,结合区域构造、沉积演化特征等分析认为,冀中坳陷束鹿凹陷中部古近系沙河街组第三段下部是一个完整的三级层序。该层序顶底界面特别是顶界面的识别标志分别是:岩性上,碳酸盐岩含量高且稳定;电性上,电阻率曲线呈块状高阻、自然伽马值普遍较低;地震上,反射特征清楚,顶界面为一明显顶超面;地化指标显示界面上下有机碳含量迥异。

【Abstract】 Based on stratigraphic correlation, core observation, thin section identifying, geochemistry analyzing and seismic horizon calibrating and tracing, and in combination with the analysis of regional tectonic and sedimentary evo- lution characteristics, an entire third- sequence is considered to be existed in lower part of the third member of Shahejie Formation in the Middle part of Shulu Sag of the middle Depression of Hebei Province. Indicators of sequence boundary, especially the top boundary were identified by using the data of lithologic character, well logging, seism, geochemistry analyzing and so on. These indicators are: the content of carbonate rock is high and steady: the exhibition of the resistivity curves is massive and high value, the natural gamma value is very low; the seismic reflection is very good and the top surface is a good toplap surface and the abundance of organic material is very different.

  • 【文献出处】 石油地质与工程 ,Petroleum Geology and Engineering , 编辑部邮箱 ,2007年06期
  • 【分类号】P539.2
  • 【被引频次】9
  • 【下载频次】133
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