摘要
为准确掌握江苏五峰—高家边组页岩气基础地质条件,在宁镇地区汤山—仑山复背斜南翼高家边组命名地实施页岩气参数井苏页1井,井深1203.37 m,全孔取芯。苏页1井钻遇高家边组中下部五峰组、汤头组,为完整揭露五峰—高家边组底部富有机质页岩的典型钻孔。基于243个厘米-分米级采样间隔的TOC(总有机碳)数据,建立了五峰—高家边组下部TOC标准柱状图。根据TOC划分的页岩分段与笔石带对应良好,共分7个页岩段,包括4个优质富有机质页岩段,其中WF4—LM3优质页岩段品质最好,为宁镇地区的典型代表。苏页1井Ro介于2.47%~2.91%之间,平均值为2.62%,总体处于过成熟早-中期生干气阶段,干酪根类型为Ⅰ型。五峰—高家边组优质、富有机质页岩呈2层式,真厚度约为22.4 m。页岩气勘探潜力最好的WF4—LM3优质页岩段真厚度为8.6 m,应视为主要产气页岩小层和未来水平井钻进层段。不同页岩段的沉积速率不同,说明有机质含量与物源输入作用关系密切。
To accurately grasp the basic geological conditions of shale gas in the Wufeng-Gaojiabian Formation,Jiangsu Province,Suye 1 shale gas parameter well with a depth of 1,203.37 m was carried out in the Gaojiabian Formation,the southern wing of Tangshan-Lunshan anticlinorium in Ningzhen area.The Suye 1 well was drilled into the Wufeng Formation and Tangtou Formation in the middle and lower parts of the Gaojiabian Formation,which is a typical borehole that completely exposed organic-rich shale at the bottom of the Wufeng-Gaojiabian Formation.Based on 243 records of TOC(total organic carbon)data at centimetre-decimeter intervals,a standard TOC histogram was established for the lower part of the Wufeng-Gaojiabian Formation.The shale segments based on TOC corresponds well to the graptolite biozone,which is divided into 7 segments,including 4 high-quality organic-rich shale segments,among which WF4-LM3 shale segment has the best quality and is a typical representative in Ningzhen area.The Ro of the Suye 1 well is between 2.47%and 2.91%,with an average value of 2.62%.It is generally in the early-middle stage of over-mature,dry gas generation,where kerogen belongs to typeⅠkerogen.The high-quality organic-rich shale of the Wufeng-Gaojiabian Formation consists of two layers with a true thickness of 22.4 m.The true thickness of high-quality WF4-LM3 shale segment with the best potential is 8.6 m,which should be regarded as the main gas producing shale bed and the future horizontal drilling target.The different deposition rates of different shale sections indicate that organic matter content is closely related to source input.
作者
岑超
阮娟
刘理湘
李世臻
韩红庆
何委徽
Cen Chao;Ruan Juan;Liu Lixiang;Li Shizhen;Han Hongqing;He Weihui(Jiangsu East China No.814 Geophysical Exploration Co.,Ltd.,Nanjing 210007,Jiangsu,China;Jiangsu Shale Gas Exploration Co.,Ltd.,Nanjing 210007,Jiangsu,China;Jiangsu Geological Bureau,Nanjing 210018,Jiangsu,China;Petroleum Resources Survey Center,China Geological Survey,Beijing 100029,China)
出处
《地质学刊》
CAS
2023年第2期113-121,共9页
Journal of Geology
基金
江苏省专项资金项目“江苏省页岩气资源调查与评价”(苏发改能源〔2015〕1541号)
江苏省地质学会2021年重点学术研究课题和学术交流方向项目(苏地会〔2021〕30号)。
关键词
页岩气
五峰—高家边组
优质页岩
富有机质页岩
笔石带
宁镇地区
shale gas
Wufeng-Gaojiabian Formation
high-quality shale
organic-rich shale
graptolite biozone
Ningzhen area
