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以升平气田为例,在大量钻井岩心分析基础上,应用地质、测井、地震等多学科资料,采用综合分析方法,详细划分了升平气田营城组火山岩的岩性和岩相,对火山岩岩石学特征、孔隙和裂缝的发育情况等储层特征进行研究,分析了火山岩不同岩性、岩相及孔隙特征对储层的影响。研究表明,升平气田主要发育流纹岩、流纹质熔结凝灰岩、火山角砾岩等7种岩石类型,爆发相、喷溢相等4种火山相,空落亚相、热基浪亚相等12种亚相及7种孔隙类型,其中从岩相与储层的关系上看,储集性能最好的是喷溢相上部亚相和爆发相热碎屑流亚相。
Taking the Shengping gas field for example, based on the analysis of a large number of drilling cores, the lithology and lithofacies of the Yingcheng Formation volcanic rocks in the Shengping gas field are detailedly divided into multi-disciplinary data of geology, logging and earthquakes using the comprehensive analysis method. Characteristics of the reservoir, the development of pores and fractures, and analyzed the influence of volcanic rock lithology, lithofacies and pore characteristics on the reservoir. The results show that there are 7 types of rock, such as rhyolite, rhyolitic melted tuff, volcanic breccia, eruptive facies and equal spurt volcanic facies in the Shengping gas field. In addition, from the relationship between lithofacies and reservoirs, the best reservoir properties are the effusive facies upper subfacies and the explosive facies thermal debris flow subfacies.