符浩;李国蓉;陈兰朴;赵勇;雷和金;彭博;黄加力;周吉羚;朱永源;高鱼伟;吴章志;胡静;何塞;

• 1:成都理工大学油气藏地质及开发工程国家重点实验室

• 2:中国石油华北油田分公司勘探开发研究院

• 3:中国地质科学院地质力学研究所

• 4:威远县地质环境监测站

摘要(Abstract)：

寒武系白云岩是塔东地区下古生界碳酸盐岩储层的重要岩石类型之一。为认识塔东地区寒武系白云岩的地球化学特征和成因机理,通过岩心及薄片观察,将研究区寒武系白云岩划分为微—细晶它形白云石、细—中晶自形白云石、中—粗晶白云石和鞍形白云石4种类型;结合阴极发光分析、微量元素测试、稀土元素分析、碳氧稳定同位素分析、流体包裹体测温和X线衍射有序度分析等,探讨研究区寒武系白云岩成因和白云化作用模式。结果表明:微—细晶它形白云石成因机制为准同生期高盐度白云化作用;细—中晶自形白云石成因机制为埋藏白云化作用;中—粗晶白云石成因机制可分为2种类型,即Ⅰ型为基性岩浆热液流体重结晶白云化作用,Ⅱ型为中酸性岩浆热液流体重结晶白云化作用;鞍形白云石成因机制也可分为2种类型,即Ⅰ型为基性岩浆热液白云化作用,Ⅱ型为中酸性岩浆热液白云化作用。该结果为研究区寒武系白云岩储层预测和油气勘探部署提供依据。

关键词(KeyWords)：白云岩;地球化学特征;成因机制;塔东地区;寒武系;岩浆热液

Abstract:

Keywords:

基金项目(Foundation):国家自然科学基金项目(41272150)

作者(Author):符浩;李国蓉;陈兰朴;赵勇;雷和金;彭博;黄加力;周吉羚;朱永源;高鱼伟;吴章志;胡静;何塞;

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