威林斯頓盆地奥陶系白云岩储层同位素与成岩作用分析

被引：5

作者：

李伟 ^{[1
,2
]}

蒲仁海 ^{[3
]}

卿海若 ^{[4
]}

机构：

[1] 中国地质大学资源学院

[2] 中国石化中原石油勘探局钻采处

[3] 西北大学地质系

[4] 里加纳大学地质系

来源：

石油实验地质 | 2009年 / 01期

关键词：

白云岩化流体; 同位素; 成岩作用; 储层; 奥陶系; 威林斯顿盆地; 加拿大;

D O I：

暂无

中图分类号：

P618.13 [石油、天然气];

学科分类号：

0709 ; 081803 ;

摘要：

威林斯顿(Williston)盆地上奥陶统红河群灰岩由于不同期次的白云岩化作用,形成了4种不同产状类型的白云石:纹层状微晶白云石、生物钻孔充填白云石,基质白云石、马鞍状白云石,只有基质白云石因具晶间孔而成为储层。4种白云石的氧、碳、锶同位素组成均与晚奥陶世的海水同位素组成有较大区别。岩石学和地化研究表明,前2种白云石的白云岩化流体应来自晚奥陶世海水,但今天的同位素组成反映了后期的改造或重构;储层白云石形成的温度稍高,时间可能稍晚,白云岩化流体可能来源于志留纪海水、或寒武—早中奥陶世海水、或深部热液;马鞍状白云石的形成应与深部热液有关。白云岩化成层状发生可能与薄的富含有机质的Kukersite页岩有关。

引用

页码：87 / 91

页数：5

共 12 条

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