西南石油大学学报(自然科学版)

• 地质勘探 • 上一篇    下一篇

三塘湖盆地卡拉岗组火山岩储层成岩作用

  

  1. 1. 中国石油杭州地质研究院,浙江杭州310023
    2. 中国石油吐哈油田分公司勘探开发研究院,新疆哈密839009
    3. 中国石油吐哈油田分公司机械厂,新疆哈密839009
  • 出版日期:2013-08-01 发布日期:2013-08-01

Diagenesis of Volcanic Rock Reservoir in Kalagang Formation of
Carboniferous,Santanghu Basin

  • Online:2013-08-01 Published:2013-08-01

摘要:

通过岩芯宏观观察、显微镜下铸体薄片精细观察,讨论了三塘湖盆地卡拉岗组火山岩储层的岩性岩相特征、
储集空间发育特征及成岩作用特征,分析了成岩作用类型与孔洞形成机制。结合火山岩岩石化学分析,并依据火山岩
成岩变化特征和过程与火山岩储层储集空间形成的相互关系,将三塘湖盆地石炭系火山岩成岩作用归纳为9 种类型、
4 个成岩期或阶段。冷凝结晶固结成岩作用期和埋藏—热液成岩作用期沸石类杏仁体和充填缝是风化壳储层形成的
关键物质基础,早期和晚期表生成岩作用期在各类缝的沟通系统内易溶组分的强烈溶蚀作用是风化壳储层形成的关
键作用,并由此形成喷发间期风化壳储层和区域构造抬升剥蚀风化壳储层两类风化壳储层。

关键词: 三塘湖盆地, 石炭系, 火山岩储层, 成岩作用, 风化壳

Abstract:

Based on the macroscopic well core observation,fine thin section observation and the petrochemistry analysis,the
diagenesis of carboniferous volcanic rock in Santanghu Basin are divided into 9 types and 4 diagenetic stages according to the
alternation feature and interrelationship of the volcanic rocks reservoir pore space. The Zeolites almond and full filled slits in
the stage of condense concretion diagenesis and burial-hydrothermal diagenetic stage provided the key material basis for the
weathering crust reservoir. In the stage of early and late epidiagenesis,intense corrosion of lyotrope in connective slits provided
the key action for the formation of the weathering crust reservoir. Then two kinds of weathering crust reservoir were formed:
eruption interval weathering crust reservoir and areal structure uplift denude weathering crust reservoir.

Key words: Santanghu Basin, carboniferous, volcanic rock reservoir, diagenesis, weathering crust