【摘要】 为了明确二连盆地洪浩尔舒特凹陷中生界火山岩的分布规律,本文通过对火山岩的岩心观察、薄片鉴定、测井资料、地震资料的综合分析,提出洪浩尔舒特凹陷中生界火山岩主要发育于阿尔善组下段、阿尔善组上段和腾格尔组一段,以安山岩、凝灰岩和火山角砾岩为主;发育爆发相、喷溢相和喷发沉积相,以喷溢相发育程度高、喷发沉积相分布广为特点;洪浩尔舒特凹陷中生代火山岩主要沿断裂分布,在垂向上表现为多期次喷发序列的叠置,共经历了3个火山喷发旋回、14个火山喷发期次。储层孔隙类型多样,以气孔和构造缝最发育。储层储集性受到火山岩岩性岩相类型、成岩后期的构造活动和成岩作用等因素的制约,以岩相因素影响最明显。更多还原

【Abstract】 Based on core observation,thin section identification and integration of well log and seismic data of the Honghaoershute Sag,the distribution pattern of Mesozoic volcanic rock in the Honghaoershute Sag of Erlian Basin was distinctly defined.This study proposed that the Mesozoic volcanic rock developed mainly within the Aershan Formation lower segment,Aershan Formation upper segment and Tengger Formation first segment,and consists of andesite,tuff and volcanic breccia.xplosive facies,effusive facies and eruptive sedimentary facies can be identified,with effusive facies well developed and widely distributed.The Mesozoic volcanic rocks are distributed mainly along faults and superimposed by multiple volcanic eruptions.Three cycles and fourteen periods of volcanic eruption have been identified.The reservoir porosity is versatile,and stomata and fractures are predominant.Reservoir accumulation is controlled mainly by petrology,lithofacies and tectonic action as well as diagenesis.更多还原