【摘要】 塔河地区海西晚期火成岩最为发育,表现为上部普遍发育一套英安岩,下部发育一套玄武岩。工区内喷发旋回极为典型,早期为基性玄武岩,晚期为酸性英安岩。研究区火成岩地震反射特征可分为6类:透镜状反射结构、丘状反射结构、板状反射结构、杂乱型反射结构、空白弱反射结构及异常增厚反射结构,不同的地震反射特征具有不同岩性组合、喷发的旋回特征。通过针对塔河火成岩类型、测井特征、储集空间、地震相分布及其对油气储集条件综合分析,结合已发现油气藏的成藏特征,指出了有利勘探区的关键因素,并针对研究区的火成岩勘探提出了建议。更多还原

【Abstract】 Volcanic rock was the most abundant developing rock structure during late period of Hercynian in Tahe area,consisting of overlying dacite and underlying basalt.The typical eruption cycle featured basic basalt early on and later acidic dacite in the study area.Seismic reflection characteristics of Volcanics in the area could be divided into six categories which include lenticular reflection,moundy reflection,slab,clutter reflection,weak reflection,and abnormal thickening of the reflex.Different combinations have different lithologic seismic reflection features and eruption cycle characteristics.Based on analysis of rock type,logging characteristics,reservoir spaces,seismic facies,reservoir condition,and accumulation’s feature of oil and gas reservoirs,this paper pointed out the key factors for favorable petroleum exploration areas,putting forward suggestions for the exploration of volcanic rock in the study area.更多还原