摘要
塔北隆起西部火成岩比较发育,岩石类型以基性喷出岩、酸性喷出岩和火山碎屑岩为主。石炭纪末期本区的岩浆活动开始,早二叠世晚期和晚二叠世早期是两个主活动期。火成岩岩性复杂,分布极不均匀,区域可对比性差。本区基性、酸性喷出岩和火山碎屑岩容易形成较好的储层,岩相上以火山口相和溢流相顶、底部位最为有利。塔北隆起西部火成岩储层可以分为Ⅲ种类型,其中I类储层物性最好,是油气勘探的主要目标。
Igneous rocks of western Tabei uplift are well developed. Basic, acidic extrusive and volcanoclastic rocks are known as the main rock types. Igneous rocks became active from late Carboniferous, and then late Early Permian and early Late Permian became two main active stages, forming the overall framework of igneous rocks in west Tabei. Rocks were active northeastward in form of fissure. They are featured by complex lithology, fairly heterogenous distribution and poor regional correlation whereas better reservoirs with good physical properties in part. In Tabei uplift, it is easy to form better reservoirs from basic, acidic extrusive and volcanoclastic rocks. The volcanic vent facies and the top and bottom of overflow facies are favorable. Igneous rocks in the uplift can be classified into 3 types. And type I with best physical properties becomes the main play target.
出处
《天然气勘探与开发》
2007年第2期1-4,29,共5页
Natural Gas Exploration and Development
关键词
火成岩
塔北隆起
储层特征
储层评价
igneous rocks, Tabei uplift, reservoir characteristics, reservoir evaluation
