风化店中生界火山岩储层特征与油气成藏模式

基于钻井、录井、测井、薄片和化学分析等资料，对风化店地区中生界火山岩储层特征及油气成藏模式进行分析研究。结果表明：火山喷发活动具有多次间歇性喷发特征，喷发中心交替转移，发育3个喷溢中心；火山岩酸性程度稍高，碱性程度略低，可分为熔岩类、火山碎屑岩类、沉积火山碎屑岩类和火山碎屑沉积岩类4类；火山岩划分为火山爆发相、火山溢流相和火山沉积相3个岩相带，并围绕3个喷溢中心呈环带状分布；油气储集空间包括原生孔隙、次生孔隙和裂缝；深大断裂沟通生油岩与储集体，形成供油网络，使油气垂向运移并于良好储层富集成藏。

Reservoir characteristics and hydrocarbon accumulation model of Mesozoic volcanic rocks in Fenghuadian area

Based on data of drilling, well logging,thin section and chemical test, the paper studied the reservoir characteristics and hydrocarbon accumulation model of Mesozoic volcanic rocks in Fenghuadian area. The result shows that volcanic eruption is intermittent and and has 3 alternative effusive centers. The volcanic rocks is of high acidity and low alkalinity, consisting of lava, pyroclastic rocks, sedimentary pyroclastic rocks and pyroclastic sedimentary rocks. The volcanics can be divided into 3 lithofacies: volcanic explosive facies, volcanic effusive facies and volcano-sedimentary facies, which circulates the 3 effusive centers. Types of reservoir space include primary pores, induced pores and fissures. Deep fractures connect oil source rocks and reservoir bodies, building oil transportation networks, so that the oil and gas can migrate vertically and accumulate in promising reservoirs.