辽河东部凹陷中生界火山岩岩相特征分析

辽河盆地东部凹陷中生界火山岩地层分布广泛,主要由火山岩及其过渡岩类组成。据钻井、录井和测井等资料以及沉积特征综合分析,研究区中生界火山岩发育火山喷溢相和火山沉积岩相两种类型,火山沉积岩相主要是夹在喷溢相之间。沉积特征及沉积分布研究表明,区内物源主要来自三界泡潜山带附近NE,整体上表现为南北两段薄中部厚度较大的变化特征。其厚度在三界泡地区达到最大。火山岩岩相与火山岩储集层特征和储集空间类型具有明显的相关关系。

Characteristics of volcanic rock sedimentary facies of Mesozoic in east sag of Liaohe Basin

In the east sag of Liaohe Basin,volcanic rock strata of Mesozoic is widely distributed,which is composed of volcanic rock and its transitional ones.By analyzing the data of drilling,logging and well logging,as well as sedimentary characteristics,it is suggested that in the area,volcanic eruption facies and volcanic sedimentary facies were mainly developed,and volcanic sedimentary facies is mainly developed between the volcanic eruption facies.Study on sedimentary characteristics and deposition distribution shows that the material source of the study area is mainly from the northeast buried hill near Sanjiepao.In whole,the thickness of the central area is thicker than that of the north and south ones,and the thickest part is in Sanjiepao area.The volcanic facies has clear relations with the characteristics and types of volcanic reservoir.