渤海湾盆地惠民凹陷临商地区火山岩储层特征

CHARACTERISTICS OF VOLCANIC ROCK RESERVOIRS IN THE LINSHANG AREA OF THE HUIMIN SAG

王金友 张世奇 赵俊青 肖焕钦

WANG Jinyou ZHANG Shiqi ZHAO Junqing XIAO Huanqing

石油大学, 地球资源与信息学院, 山东, 东营, 257061 2. 胜利油田, 地质科学研究院, 山东, 东营, 257061

College of Earth Resources and Information, University of Petroleum, Dongying, Shandong 257061, China 2. Research Institute of Geosciences, Shengli Oilfield, Dongying, Shandong 257061, China

文中运用火山岩岩心资料、测井资料、孔渗及压汞分析等资料对渤海湾盆地惠民凹陷临商地区沙一段火山岩储层的特征进行了深入研究,认为该区火山岩储层以火山角砾岩与凝灰岩为主,它们在测井响应上具有不同的特征.火山岩储集空间主要为粒间孔、溶蚀孔及构造缝,孔隙结构具有小孔细喉、孔喉连通性与分选性差的特点,这是导致岩石孔渗相关性不好的内在因素.火山岩相影响着火山岩储集空间的发育,火山碎屑流相中上部及爆发坍落相顶部为有利的储集相带,是今后寻找火山岩油藏的主要勘探目标区.

Core description,well logging interpretation,porosity and permeability data and mercury-injection curves were used in this paper to study the char cteristics of volcanic rock reservoirs in the Sha 1 Member of Linshang area,the Huimin Sag,the Bohaiwan Basin.The volcanic rock reservoirs in this area were mainly composed of volcanic breccia and tuff,and they had different response characters on logging curves.The reservoir spaces of volcanic rocks included intergranular pores,solution openings and structural fractures.The pore structure was characterized by small pores and thin throats and bad pore-throat connectivity and sorting degree,which were the inner factors to result in the bad correlationship between porosity and permeability.Volcanic rock facies affected the development of reservoir spaces of volcanic rocks,and the middle-upper part of volcanic clastic facies and the top of explosion talus facies were the best favorable facies zones for accumulation.And they are the main exploration targets in searching for the oil and gas pools of volcanic rocks in the future.

国家"973"重点基金项目(G1999043304).

https://doi.org/10.11781/sysydz200303264