惠民凹陷商741区沙一段火山岩储层特征  

Characteristics of Volcanic Reservoirs in Sha-1 Member of Shang 741 Area of Huimin Depression

作　　者：韩作振[1,2] 李昊 尉鹏飞[3] 韩梅 韩超 高丽华[1,2] 

机构地区：[1]山东科技大学山东省沉积成矿作用与沉积矿产重点实验室,山东青岛266590 [2]山东科技大学地球科学与工程学院,山东青岛266590 [3]山东省地质科学研究院,山东济南250013

出　　处：《山东科技大学学报（自然科学版）》2018年第1期47-59,70,共14页Journal of Shandong University of Science and Technology(Natural Science)

基　　金：国家自然科学基金项目(41372134);山东省重大科技创新工程项目(2017CXGC1602;2017CXGC1603);山东科技大学科研创新团队支持计划项目(2015TDJH101)

摘　　要：惠民凹陷商741区沙一段存在多层火山岩,通过对其4口取芯井岩芯的观察、描述和54张岩石薄片的鉴定,认为研究区沙一段火山岩以火山碎屑岩中的火山角砾岩和凝灰岩为主,储集空间类型主要有原生气孔、粒间孔,溶蚀作用形成的粒间溶孔、粒内溶孔,以及构造裂缝、成岩收缩裂缝等类型。岩芯物性及测井资料解释,研究区火山岩储层具有孔隙度较高、渗透率差别较大,非均质性较强的特点;在垂向上,第Ⅳ、Ⅴ、Ⅵ期的火山岩储层物性较好,第Ⅱ、Ⅲ期次之,第Ⅰ期的物性最差。从成岩作用方面探究其原因,认为溶蚀作用改善了储集性能。There are many volcanic eruptions in Sha-1 member of the Shang 741 area of Huimin Depression.Through the observation and description of the core of the four core wells as well as the identification of 54 slices,it has been found that the volcanic rocks of Sha-1 member in the study area are mainly volcanic breccia and tuffs of the volcanoclastic rocks.The types of reservoirs are mainly composed of protogenetic pores,intergranular pores,intergranular dissolution pores,intragranular dissolution pores,tectonic fractures and diagenetic shrinkage fractures.The physical characteristics of rock core,mercury injection and logging data suggest that the volcanic reservoirs in the study area are characterized by high porosity,large difference in permeability and strong heterogeneity.In the vertical direction,the volcanic reservoirs of Phase IV,V and VI have better physical properties;Phrase II and III followed;and Phase I has the worst physical properties.In terms of the diagenesis,it is found that it is the dissolution that has improved the reservoir performance.

关 键 词：惠民凹陷 商741区 沙一段火山岩 储集空间 物性特征 喷发期次 

分 类 号：TE122.2[石油与天然气工程—油气勘探]