西南石油大学学报（自然科学版）Issue(1)：45-50,6.DOI:10.11885/j.issn.1674-5086.2013.11.20.04
四川盆地下志留统龙马溪组底部界线研究
Study on Longmaxi Formation Bottom Boundary in Sichuan Basin
王兴志 1李宜真 1杜洋 1胡杨 2李烨3
作者信息
- 1. 油气藏地质及开发工程”国家重点实验室·西南石油大学，四川 成都 610500
- 2. 中国石油川庆钻探工程有限公司地质勘探开发研究院，四川 成都 610052
- 3. 中国石油川庆钻探工程有限公司地质勘探开发研究院，四川 成都 610052
- 折叠
摘要
Abstract
In order to solve the partitioning problem on the bottom boundary of lower Silurian Longmaxi Formation,based on previous researches,with the macroscopic and microscopic observation of outcrops and drilling cores and the analysis of well logging,mineralogical and geochemical data in Sichuan Basin and its peripheral areas,the differences between Longmaxi and Wufeng Formation show that there are higher limy content,many brachiopods,low GR and high RT logging values,high calcite content and lower TOC values in the top of Wufeng Formation,while the bottom of Longmaxi Formation have none limy content,none brachiopods and abundant graptolites,high GR and low RT logging values,high clay and quartz content, highest TOC values. The study suggested that the detection of limy content and comparison of log are the fast and accurate methods of demarcating Longmaxi Formation bottom boundary in practical operation,and it can provide some theoretical basis for furthermore shale gas exploration in Longmaxi Formation of Sichuan Basin.关键词
四川盆地/龙马溪组/底界/五峰组/下志留统Key words
Sichuan Basin/Longmaxi Formation/bottom boundary/Wufeng Formation/lower Silurian分类
能源科技引用本文复制引用
王兴志,李宜真,杜洋,胡杨,李烨..四川盆地下志留统龙马溪组底部界线研究[J].西南石油大学学报（自然科学版）,2014,(1):45-50,6.
