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在火山岩岩石类型划分基础上,结合地质、测井和地震资料综合分析,识别火山岩体。在此基础上将研究区目的层火山岩相划分为爆发相、溢流相等5种类型和溅落亚相、空落亚相等16种亚相类型。通过单井、剖面地震相、平面地震相和火山岩相特征分析,认为火山口对火山岩体具有重要的控制作用,在火山岩体的不同部位发育不同的火山岩相类型,不同类型的火山岩相展布又控制着火山岩气藏储层的分布特征。研究区储层主要发育于爆发相和溢流相中,少数发育于其他相带。爆发相溅落亚相、空落亚相,侵出相外带亚相、中带亚相,溢流相下部亚相、顶部亚相、上部亚相,火山通道相的火山颈亚相等为优质储集体发育部位。
Based on the classification of volcanic rocks, volcanic rocks are identified by comprehensive analysis of geology, logging and seismic data. On this basis, the volcanic rock facies in the target area of the study area are divided into five types, ie, explosive facies, spillover facies, and spatter sub-facies, and void sub-subtypes. According to the characteristics of single well, section seismic facies, plane seismic facies and volcanic facies, it is considered that volcano crater has important control over volcanic rock mass, different volcanic facies types are developed in different parts of volcanic rock mass, and different types of volcanic facies distribution Controlling the distribution of volcanic gas reservoirs. The reservoirs in the study area mainly develop in the eruption phase and the overflow phase, and a few of them develop in other facies belts. Eruption phase sedimentary subfacies, emplacement subfacies, intrusive facies subfacies, middle subfacies, lower facies subfacies, top subfacies, upper subfacies, and volcanic channel volcanoes. Collective development site.