彰武盆地张强凹陷火山岩特征

The characteristic of the volcanics in Zhangqiang sag of Zhangwu basin.

张强凹陷火山岩主要分布在下白垩统内 ,主要为中酸性流纹岩及安山岩 ,以喷发相、喷溢相、近火山口相、次火山岩相、沉火山—火山沉积相为主。总结了该区火山岩活动期次 ,为盆地演化、油气生成、运移、聚集的研究提供了依据 ,并发现一定规模的火山岩裂缝油藏 ;研究了火山岩储集层类型、参数特征及裂缝分布 。

The volcanics in Zhangqiang sag is mainly distributed in Lower Cretaceous period stratigraphy, and is mainly middle acid rhyolite and andesite. The eruption patterns include eruptive facies, eruptiveoverflowing facies, nearcrater facies, subvolcanic facies and volcanic sedimentary facies. The volcanicity times are summarized, it provided basis for researching basin evolution, hydrocarbon generation, migration and accumulation. The volcanics fractured reservoir with a fair scale is discovered. The types, parameter features and fracture distribution of volcanics reservoirs are studied. The favorable reservoirforming volcanics structures are indicated.