【摘要】 研究火山岩岩相是解剖火山机构、识别火山岩岩性和预测有利储层的关键。从松辽盆地长岭断陷的地质、地震和钻井资料入手,通过研究爆发相、溢流相、火山沉积相、火山通道相和侵出相5种火山岩岩相的形成机制和识别特征,揭示爆发相和溢流相具有较好的储集物性,是油气储集的有利相带。根据火山岩岩相的识别模式,解剖火山机构岩相变化规律,结合深大断裂、岩性变化等因素,在长岭断陷东部查干花构造带识别出多个火山体,重点描述了爆发相和溢流相的分布范围,取得了较好的天然气勘探效果。更多还原

【Abstract】 Volcanic rock facies is key to analyze volcanic edifices,identify volcanic lithology and predict potential reservoir.Based on geological,seismic and drilling data from the Changling fault depression in Songliao basin,this paper probes into the formation mechanism and recognition features of explosive facies,overflow facies,volcanic sediment facies,volcanic vent facies,and extrusive facies,reveals that explosive facies and overflow facies are favorable facies belts for oil and gas concentration.A volcanic edifice lithological facies change rules is summarized according to the identification mode of igneous rocks.This paper,combined with geological setting such as deep faults and lithofacies changes,identifies many volcanic units in Cha’ganhua structure zone in eastern Changling fault depression,expands the distribution of explosive facies and overflow facies,which gives an achievement in natural gas exploration.更多还原