Geochemical features and geologic significances of source rocks in Nanpu Sag, Bohai Bay Basin
-
摘要: 通过对渤海湾盆地南堡凹陷烃源岩地球化学特征的多参数精细描述和对比研究认为,沙三段有效烃源岩厚度大,有机碳含量高达2.5%~8%,以Ⅱ1和Ⅰ型有机质为主,处于成熟—高成熟阶段,为好的有效烃源岩;沙一段有机碳含量1.2%~2.3%,有机质类型以Ⅱ2和Ⅲ型为主,为好的有效烃源岩。东三段有机碳含量0.2%~2.6%,以Ⅱ2型有机质为主,处于成熟演化阶段,为较好的有效烃源岩。因此,预测南堡凹陷勘探有利方向:第一类为紧邻以Ⅱ1和Ⅰ型有机质烃源岩为主的生烃凹陷分布的南堡1-2号构造和南堡3-4号构造;第二类为紧邻以Ⅱ2和Ⅰ型有机质烃源岩为主的生烃凹陷分布的高尚堡构造—柳赞构造;第三类是紧邻以Ⅱ2和Ⅲ型有机质烃源岩为主的生烃凹陷分布的老爷庙构造—北堡构造和南堡5号构造。Abstract: Fine description and comparative study of the geochemical features of source rocks in the Nanpu Sag of the Bohai Bay Basin have been made according to multiple parameters.It has been concluded that effective source rocks in the 3rd member of the Shahejie Formation are regarded as excellent effective hydrocarbon source rocks thanks to big thickness and high organic abundance(2.5%-8%).They are mainly of Ⅱ1 and Ⅰ organic types,and are in mature and over mature stages.Effective source rocks in the 1st member of the Shahejie Formation are regarded as good ones since the organic abundance ranges from 1.2% to 2.3%,and the organic types are dominated by Ⅱ2 and Ⅲ.Effective source rocks in the 3rd member of the Dongying Formation are regarded as relatively good ones of mature stage since the organic abundance ranges from 0.2% to 2.6%,and the organic type is dominated by Ⅱ2.3 regions favorable for exploration in the Nanpu Sag have been pointed out.1)Structures Nanpu1-2 and 3-4 close to hydrocarbon generation sags dominated by types Ⅱ1 and Ⅰ source rocks.2)Structures Gaoshangpu and Liuzan close to hydrocarbon generation sags dominated by types Ⅱ2 and Ⅰ source rocks.3)Structures Laoyemiao-Beipu and Nanpu5 close to hydrocarbon generation sags dominated by types Ⅱ2 and Ⅲ source rocks.
-
Key words:
- geochemical feature /
- Paleocene /
- favorable exploration /
- region Nanpu Sag /
- Bohai Bay Basin
-
[1] 刘蕴华,周海民,熊保贤,等.南堡凹陷的含油气系统分析[J].石油与天然气地质,2000,21(4):364-366. [2] 周天伟,翟瑞国.渤海湾盆地南堡凹陷构造样式成因与控油作用试验研究[J].石油天然气学报,2008,30(2):10-14. [3] 万涛,蒋有录,董月霞,等.南堡凹陷1号构造带油气成藏研究[J].石油天然气学报,2011,33(8):26-30. [4] 李宏义,姜振学,董月霞,等.冀东油田南堡2号构造古潜山成藏条件及模式[J].断块油气田,2010,17(6):678-681. [5] 徐德英,周江羽,王华,等.渤海湾盆地南堡凹陷东营组地层水化学特征的成藏指示意义[J].石油实验地质,2010,32(3):285-289. [6] 赵彦德,刘洛夫,张枝焕,等.南堡凹陷古近系层序地层格架中烃源岩分布与生烃特征研究[J].沉积学报,2008,26(6):1078-1084. [7] 郑红菊,董月霞,朱光有,等.南堡凹陷优质烃源岩的新发现[J].石油勘探与开发,2007,34(4):385-391. [8] 梅玲,张枝焕,王旭东,等.渤海湾盆地南堡凹陷原油地球化学特征及油源对比[J].中国石油大学学报(自然科学版),2008,32(6):40-46. [9] 赵彦德,刘洛夫,张枝焕,等.渤海湾盆地南堡凹陷滩海地区奥陶系原油油源分析[J].现代地质,2008,22(2):265-272. [10] 范龇澈,黄志龙,庞雄奇,等.南堡凹陷古近系深层烃源岩分布特征及厚度预测[J].油气地质与采收率,2011,18(2):21-25. [11] 李素梅,姜振学,董月霞,等.渤海湾盆地南堡凹陷原油成因类型及其分布规律[J].现代地质,2008,22(5):818-823. [12] 朱光有,张水昌,王拥军,等.渤海湾盆地南堡大油田的形成条件与富集机制[J].地质学报,2011,85(1):97-112. [13] 梅玲,张枝焕,范有余,等.南堡凹陷Es34段烃源岩有机地球化学特征及其油源贡献[J].天然气地球科学,2009,20(6):961-967. [14] 贾齐山,李胜利,马乾,等.冀东油田南堡凹陷南堡2号构造带烃源岩地球化学特征与油源对比[J].地质力学学报,2006,12(4):469-475. -
计量
- 文章访问数: 4269
- HTML全文浏览量: 96
- PDF下载量: 1049
- 被引次数: 0