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营城组火山岩是松辽盆地SN地区火山岩气田的主要储层。通过对SN营城组火山岩不同喷发期次火山喷发方式的分析,并将典型井YS101井营城组火山岩剖面与长白山天池火山岩剖面进行对比,认为SN火山岩有两种喷发方式,早期为斯通博利式喷发,晚期为普林尼式喷发。根据不同喷发方式产物特征的差异,提出了依据喷发方式来建立火山岩岩相模式。从SN气田实际出发,建立了斯通博利式和普林尼式的理想岩相模式。分析了不同喷发方式和岩相模式对火山岩储层发育的控制作用。
The Yingcheng Formation volcanic rocks are the main reservoirs of volcanic gas fields in the SN area of Songliao Basin. Based on the analysis of volcanic eruptions in different eruptions of the SN Yingcheng Formation volcano and comparison of the Yingcheng Formation volcanic profile of the YS101 well with the Changbaishan Tianchi volcanic profile, it is concluded that there are two types of SN volcanic eruptions: early Stonestone Eruption, the late Pliny eruption. According to the differences of product characteristics in different eruption modes, a volcanic lithofacies model based on eruptions is proposed. Starting from the actual SN gas field, Stonestone and Pliny ideal lithofacies model was established. The controllability of volcanic reservoir development by different eruption modes and lithofacies models is analyzed.