莺山断陷侏罗系火山岩储层特征论述.pdf

大庆石油地质与开发990403 大庆石油地质与开发 PETROLEUM GEOLOGY ＆ OILFIELD DEVELOPMENT IN DAQING 1999年 第18卷 第4期 Vol.18 No.4 1999 莺山断陷侏罗系火山岩储层特征 刘为付　刘双龙　孙立新 摘要　莺山断陷侏罗系火山岩主要为安山岩、玄武岩、英安岩、火山角砾岩及凝灰 岩。岩石类型不同测井曲线表现形式不同，火山岩地震反射特征为乱岗状，连续性 差。其主要储集空间为孔隙和裂缝，孔隙类型较多，包括气孔、溶蚀孔洞、收缩孔 等，裂缝主要为构造裂缝，其次为风化裂缝和成岩裂缝。区内火山岩可划分为3个岩相 带：火山爆发相、火山喷溢相和火山沉积相。储层分为4类：Ⅰ类储层分布在火山爆发 相，孔、渗好；Ⅱ类储层分布在火山爆发-喷溢相，孔、渗中等；Ⅲ类储层分布在火山 喷溢-火山沉积相，孔、渗差；Ⅳ类储层分布在火山沉积相，孔、渗最差。 主题词　火山岩　　储集层　　岩相　　侏罗系　　莺山断陷 RESERVOIR CHARACTERISTICS OF JURASSIC SYSTEM VOLCANIC ROCK IN YINGSHAN FAULT DEPRESSION Liu Weifu, Liu Shuanglong Sun Lixin (ED Research Institute of Daqing Petroleum Administrative Bureau, Heilongjiang,163712, P.R.China) pp9-11. ABSTRACT Jurassic volcanic rocks in Yingshan fault depression are mainly andesite, basalt, dacite, volcanic breccia and tuff. Different types of rocks have different patterns of logs. Seismic reflection characteristics of volcanic rock is discontinuous. Its main reservoir space is provided by pores and fractures. Pores belong to many types including gas pore, karst pores, shrinkage pore etc. Fractures are mainly structural fracture, then weathered fracture and diagenetic fracture. Volcanic rocks in the area can be divided into 3 facies zones: volcanic explosion facies, volcanic extrusion facies and volcanic sedimentary facies. Reservoirs are divided into 4 types: type I reservoir occurs in volcanic facies and has good porosity and permeability; type II reservoir occurs in volcanic explosion-extrusion facies and has medium porosity and permeability; type III reservoir occurs in volcanic extrusion- sedimentary facies and has bad porosity and permeability; type IV reservoir occurs in volcanic sedimentary facies and has worst porosity and permeability. KEY WORDS Volcanic r