[1]彭晓东,徐锦龙,方朝刚,等.宣广盆地中二叠世栖霞组层序地层特征及页岩气勘探前景[J].华东地质,2022,43(02):154-166.[doi:10.16788/j.hddz.32-1865/P.2022.02.003]
　PENG Xiaodong,XU Jinlong,FANG Chaogang,et al.Sequence stratigraphic characteristics and shale gas exploration prospect of Middle Permian Qixia Formation in the Xuancheng-Guangde Basin[J].East China Geology,2022,43(02):154-166.[doi:10.16788/j.hddz.32-1865/P.2022.02.003]
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宣广盆地中二叠世栖霞组层序地层特征及页岩气勘探前景()
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《华东地质》[ISSN:2096-1871/CN:32-1865/P]

卷:
43
期数:
2022年02期
页码:
154-166
栏目:
基础地质
出版日期:
2022-06-23

文章信息/Info

Title:
Sequence stratigraphic characteristics and shale gas exploration prospect of Middle Permian Qixia Formation in the Xuancheng-Guangde Basin
作者:
彭晓东1;  徐锦龙1;  方朝刚2;  沈仕豪1;  章诚诚2
1. 安徽省地质调查院, 安徽合肥 230001;
2. 中国地质调查局南京地质调查中心, 江苏南京 210016
Author(s):
PENG Xiaodong1;  XU Jinlong1;  FANG Chaogang2;  SHEN Shihao1;  ZHANG Chengcheng2
1. Geological Survey of Anhui Province, Hefei 230001, Anhui, China;
2. Nanjing Center, China Geological Survey, Nanjing 210016, Jiangsu, China
关键词:
层序地层; 页岩气; 栖霞组; 安徽省宣广盆地
Keywords:
sequence stratigraphy; shale gas; Qixia Formation; Xuancheng-Guangde Basin of Anhui Province
分类号:
TE122.2
DOI:
10.16788/j.hddz.32-1865/P.2022.02.003
摘要:
对宣广盆地中二叠世栖霞组进行层序地层学分析,结合栖霞组富有机质页(泥)岩有机地球化学特征,评价页岩气勘探前景。研究表明:区内栖霞组可分为3个三级层序;每个层序划分出海侵体系域、凝缩段和高水位体系域,代表了一次相对较大的海平面升降旋回。富有机质页(泥)岩主要分布于凝缩段、凝缩段与海侵体系域或高水位体系域的转换过渡层段。栖霞组富有机质页(泥)岩厚8~35 m,TOC值0.77％~9.49％,有机质成熟度为1.428％,脆性矿物(石英、长石)相对富集,具有良好的脆性和可压性,页岩气成藏条件良好,特别是栖霞组五段具有巨大的资源潜力。
Abstract:
Based on the method of sequence stratigraphy, the stratigraphic sequence of the Middle Permian Qixia Formation in the Xuancheng-Guangde Basin was analyzed. Combined with the organic geochemical characteristics of the organic-rich shale, the shale gas exploration prospect was evaluated. The results show that the Qixia Formation in the Xuancheng-Guangde Basin can be divided into three third-order sequences, which represent three relatively large cycles of sea-level rise and fall. Each sequence can be subdivided into the transgressive systems tract, the condensed section, and the highstand systems tract. The organic-rich shale mainly occurred in the condensed section and transitional sections between the condensed section and transgressive systems tract or highstand systems tract. The thickness of organic-rich shales in Qixia Formation varies from 8 to 35 m. The TOC value ranges from 0.77% to 9.49%, and the maturity of organic matter is about 1.428%. Brittle minerals (quartz, feldspar) of shales are relatively enriched, showing good brittleness and compressibility. Accordingly, shale gas accumulation conditions of Qixia Formation are good, especially for the top limestone section of Qixia Formation, which has great resource potential.

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备注/Memo

备注/Memo:
收稿日期:2021-05-18;改回日期:2021-11-02。
基金项目:中国地质调查局"长江中下游成矿带安庆-盱眙地区地质矿产调查(编号:1212011120848)"、"苏皖地区页岩气地质调查(编号:DD20190083)"和安徽省矿山生态修复工程实验室开放课题(编号:KS-2021-002)项目联合资助。
作者简介:彭晓东,1986年生,男,工程师,硕士,主要从事矿产地质调查工作。Email:pxdlengsha@126.com。
通讯作者:徐锦龙,1985年生,男,高级工程师,硕士,主要从事区域地质与油气地质调查工作。Email:xujinlong0909@126.com。
更新日期/Last Update: 1900-01-01