小型断陷湖盆有效烃源岩分布特征与分布模式——以二连盆地下白垩统为例

doi:10.7623/syxb201506001

石油学报 ›› 2015, Vol. 36 ›› Issue (6): 641-652.DOI: 10.7623/syxb201506001

• 地质勘探 • 下一篇

小型断陷湖盆有效烃源岩分布特征与分布模式——以二连盆地下白垩统为例

赵贤正¹, 柳广弟², 金凤鸣¹, 黄志龙², 卢学军¹, 孙明亮², 丁修建², 陈哲龙²

1. 中国石油华北油田公司河北任丘 062552;
2. 中国石油大学地球科学学院油气资源与探测国家重点实验室北京 102249

收稿日期:2014-11-06 修回日期:2015-03-20 出版日期:2015-06-25 发布日期:2015-08-06
通讯作者: 柳广弟,男,1961年10月生,1982年获华东石油学院学士学位,1991年获石油大学(北京)博士学位,现为中国石油大学(北京)地球科学学院教授、博士生导师,主要从事石油地质和油气资源评价方面教学和研究工作。Email:lgd@cup.edu.cn
作者简介:赵贤正,男,1962年10月生,1986年获华东石油学院学士学位,2005年获中国石油大学(北京)博士学位,现为中国石油华北油田公司副总经理、教授级高级工程师,李四光地质科学奖、孙越崎能源大奖获得者,主要从事油气勘探、煤层气勘探与开发研究管理工作。Email:xzzhao@petrochina.com.cn
基金资助:
国家重大科技专项(2011ZX05006-005)和中国石油天然气股份有限公司科技项目(2014E-035)资助。

Distribution features and pattern of effective source rock in small faulted lacustrine basin:a case study of the Lower Cretaceous in Erlian Basin

Zhao Xianzheng¹, Liu Guangdi², Jin Fengming¹, Huang Zhilong², Lu Xuejun¹, Sun Mingliang², Ding Xiujian², Chen Zhelong²

1. PetroChina Huabei Oilfield Company, Hebei Renqiu 062552, China;
2. College of Geosciences, China University of Petroleum; State Key Laboratory of Petroleum Resource and Prospecting, Beijing 102249, China

Received:2014-11-06 Revised:2015-03-20 Online:2015-06-25 Published:2015-08-06

摘要/Abstract

摘要：

以二连盆地下白垩统为例,研究了小型断陷湖盆有效烃源岩分布特征与分布模式。根据烃源岩热解分析指标S₁与有机碳含量的关系,建立了有效烃源岩有机质丰度的下限标准,对二连盆地有效烃源岩进行了识别,研究了有效烃源岩的分布。研究发现小型断陷湖盆有效烃源岩分布特征明显不同于大型湖盆有效烃源岩主要分布在深湖—半深湖区的特征,其有效烃源岩的分布有3种模式,即深洼型、近洼缓坡型和深洼—缓坡型。边界断层规模大、活动性强的小型断陷湖盆一般深洼带宽度与盆地宽度比值大,有效烃源岩主要分布于深洼带;边界断层规模小、活动性弱的小型断陷湖盆深洼带宽度与盆地宽度比值小,有效烃源岩主要分布于近洼缓坡带;边界断层规模中等、活动性适中的小型断陷湖盆深洼带宽度与盆地宽度比值居中,有效烃源岩在深洼带和近洼缓坡带均有分布。小型断陷湖盆凹陷结构和形成机制的差异控制了湖盆的沉积速率、古生产力和水体氧化-还原条件,决定了有效烃源岩的形成和分布。

关键词: 有效烃源岩, 古生产力, 小型断陷湖盆, 下白垩统, 腾格尔组, 二连盆地

Abstract:

Taking the Lower Cretaceous in Erlian Basin as an example, distribution characteristics and distribution pattern of effective source rock in small faulted lacustrine basin have been studied. Lower limit of the organic matter abundance parameters of effective source rock is determined based on the relationship between the pyrolysis parameter S₁ and organic carbon content. According to this discrimination standard, the effective source rock in Erlian Basin is recognized and its distribution is studied. Research shows that the distribution of effective source rock in small faulted lacustrine basin is significantly different with large-scale lacustrine basin, where the effective source rock is mainly distributed in deep or semi-deep lake. There are three distribution patterns in small faulted lacustrine basin, i.e., "deep sag type", "gentle slope type", and "deep sag-gentle slope type". The small faulted lacustrine basins with large-scale boundary faults and strong fault activities usually have high ratio of deep-sag width to basin width, and the effective source rock is mainly distributed in deep sag; while those with small-scale boundary faults and weak fault activities have lower ratio of deep-sag width to basin width, and the effective source rock is mainly distributed in gentle slope belt near the sag; between these two types are basins with medium boundary faults and moderate fault activity, they have the medium ratios and the effective source rock is distributed in both deep sag and gentle slope belt. The difference in depression structure and formation mechanism of small faulted lacustrine basin has a controlling effect on deposition rate, paleo-productivity and water redox conditions, which determine the formation and distribution of effective source rock.

Key words: effective source rock, paleoproductivity, small faulted lacustrine basin, Lower Cretaceous, Tengger Formation, Erlian Basin

中图分类号:

TE122.14

赵贤正, 柳广弟, 金凤鸣, 黄志龙, 卢学军, 孙明亮, 丁修建, 陈哲龙. 小型断陷湖盆有效烃源岩分布特征与分布模式——以二连盆地下白垩统为例[J]. 石油学报, 2015, 36(6): 641-652.

Zhao Xianzheng, Liu Guangdi, Jin Fengming, Huang Zhilong, Lu Xuejun, Sun Mingliang, Ding Xiujian, Chen Zhelong. Distribution features and pattern of effective source rock in small faulted lacustrine basin:a case study of the Lower Cretaceous in Erlian Basin[J]. Acta Petrolei Sinica, 2015, 36(6): 641-652.

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小型断陷湖盆有效烃源岩分布特征与分布模式——以二连盆地下白垩统为例

Distribution features and pattern of effective source rock in small faulted lacustrine basin:a case study of the Lower Cretaceous in Erlian Basin

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