中
2016年3月，第22卷，第1期，127-137页 March 2016,Vol.22，No.1,pp.127137
D0I: 10.16108/j.issn10067493.2015245
中
高校地质学报
Geological Journal of China Universities
江苏省下志留统黑色页岩浅井钻探及其页岩气潜力分析
贾东，胡文瑄"，姚素平"，尹宏伟，李一泉"，王文卉"，周启友"，吴晓俊
1.南京大学能源科学研究院，地球科学与工程学院，南京210023；
2.南京大学地理与海洋科学学院，南京210023
摘要：近年来上扬子地区下志留统龙马溪组页岩气勘探开发取得重大突破，属于同一大地构造单元的下扬子地区，其页岩气资源潜力和勘探前景问题日益受到关注。在下扬子地区与龙马溪组层位相当的高家边组，由于地表风化程度较强和出露情况较差等因素，其黑色页岩的分布范围和沉积厚度不甚基清楚，直接影响了对下扬子地区页岩气勘探潜力的评价和预测。为此本次研究选择在江苏省南京汤山和句容仑山两地实施黑色页岩浅井钻探。基于5口钻井的岩芯提取，从黑色页岩厚度、地化、岩矿和生物地层学等多个方面揭示了下扬子地区五峰组一高家边组黑色页岩基本特征。分析结果表明：该地区黑色页岩与上扬子焦石坝地区有很好的对比性，至少有4个笔石化石带相互一致。五峰组一高家边组黑色笔石页岩厚度在汤山地区大于80.5m，仑山地区至少39.5m，有机质丰度较高，多数T0C含量1.2%~4%，显示了较强的生烃能力。镜质体反射率（Ro）主要在1.5%~2.6%之间，热演化程度以高一过成熟为主，进人生气阶段。黑色页岩有机质以干酪根I、Ⅱ，型
为主。固此，认为下扬子地区下志留统黑色页岩具有良好的页岩气资源潜力。关键词：下扬子地区；页岩气；下志留统黑色页岩；浅井钻探；潜力
中图分类号：P618.13
文献标识码：A
文章编号：10067493（2016）01012711
ShallowBoreholeDrillingof theLower SilurianBlackShaleinJiangsu
ProvinceandtheShaleGasPotentialAnalysis
JIA Dong"*, HU Wenxuan', YAO Suping', YIN Hongwei', LI Yiquan’, WANG Wenhui'
ZHOU Qiyou',WU Xiaojun
1. Institute of Energy Seiences, School of Earth Sciences and Engineering, Nanjing University, Nanjing 210023, China;
2. School of Geographic and Oceanographic Seiences, Nanjing University, Nanjing 210023, China
Abstract: The shale gas exploration of the Longmaxi formation in the Lower Silurian in the upper Yangtze region obtained great breakthrough in recent years. More and more attention is focused on the shale gas resouroe potential and exploration prospect in the lower Yangtze zone, which is in the same tectonic block with the upper Yangtze. The Gaojiabian formation in the lower Yangtze is the equivalent layer of the Longmaxi formation in the upper Yangtxe, Due to the strong erosion on the surface and the bad exposure, the distribution and the thickness of the black shale rock are unelear, which restrict the evaluation and prospection of the shale gas exploration potential. In this respect, this study performed the shallow well drilling project for the black shale in the Tangshan in Nanjing and Lunshan in Jurong, On basis of the analysis of the cores from these 5 boreholes, this study revealed the characteristics of the black shale, including the thickness, geochemical features, petrology, and biostratigraphy. The results suggest that the black shale is well comparable with the Jiaoshiba in the upper Yangtze and that at least 4 graptolite fossil zones are consistent with each other. The thickness of the Wufeng-Gaojiabian black graptolite shale is larger than 80.5 m in Tangshan zone, and larger than 39.5 m in Lunshan.
收稿日期：2015-12-11；修回日期：201602-25
基金项目：江苏省科技支撑计划（工业）（BE2013115）
作者简介：贾东，男，1960年生，教授，博土生导师，主要从事含油气盘地构造和活动构造研究；E-mail:djia@aju.odu.cn
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