一一收稿日期:20180131:改回日期:20180326一一基金项目:国家自然科学基金 长白山地区火山地层和火山架构及其与次生灾害和喷发趋势的关系 (41472304)一一作者简介:周健(1992 ),男,2012年毕业于山东科技大学地质工程专业,现为吉林大学矿产普查与勘探专业在读硕士研究生,主要从事非常规油气勘探研究三一一通讯作者:单玄龙(1969 ),男,教授,博士生导师,吉林大学地球科学学院副院长,1991年毕业于长春地质学院矿产普查与勘探专业,1998年毕业于长春科技大学沉积盆地与油气地质专业,获博士学位,现主要从事石油与天然气勘探和火山岩与含油气盆地的研究三DOI :10．3969/j．issn．1006-6535．2018．03．010
德惠断陷沙一段凝灰岩储层特征及测井识别
周一健1,2,单玄龙1,2,迟唤昭1,2,岳庆友1,2,苍正毅1,2
(1．吉林大学,吉林一长春一130026;2．东北亚生物演化与环境教育部重点实验室,吉林一长春一130026)
摘要:为明确德惠断陷沙一段凝灰岩储层特征,以薄片二X 衍射分析二物性等资料为基础,开展
了凝灰岩储层微观特征研究三结合测井曲线,利用GR -DEN 二AC -DEN 和R t -AC 曲线交会图版
将凝灰岩储层从围岩中区分开来三研究结果表明:沙一段储集空间的岩石类型为晶屑凝灰岩二玻屑晶屑凝灰岩和凝灰质砂岩;凝灰岩中的主要矿物为石英和长石,储集空间类型为以长石溶
蚀孔为主的次生孔隙;凝灰岩储层具有中低孔二超低渗微细喉道的特征,微小的孔喉和以伊蒙
混层为主的强水敏黏土矿物导致渗透率极低三由测井曲线交会图版可知,凝灰岩储层具有低
的DEN ,相对高的GR 与AC 和较低的R t 特征三该研究对德惠断陷沙一段凝灰岩油气藏的勘
探具有指导意义三
关键词:凝灰岩;储层特征;测井识别;德惠断陷;沙一段
中图分类号:TE122．2一一文献标识码:A 一一文章编号:1006-6535(2018)03-0050-06
Tuff Reservoir Properties and Logging Identification in the Sha 1Member of Dehui Fault Depression
Zhou Jian 1,2,Shan Xuanlong 1,2,Chi Huanzhao 1,2,Yue Qingyou 1,2,Cang Zhengyi 1,2
(1.Jilin University ,Changchun ,Jilin 130026,China ;
2.Key Laboratory for Evolution of Past Life and Environment in Northeast Asia ,Ministry of Education ,Changchun Jilin 130026,China )
Abstract :In order to clarify the tuff reservoir properties in the Sha1Member of Dehui fault depression ,thin -sec-
tion ,s -ray diffraction analysis ,physical properties and other data are used to study the microscopic properties of
tuff https://www.doczj.com/doc/cc13367222.html,bining with logging data ,the intersection chart between GR -DEN ,AC -DEN and R t -AC curves are used to identify the tuff reservoir from the surrounding rock.Research indicates that the reservoir rock of Sha1
Member mainly consists of crystal tuff ,vitreous -crystal tuff and tuff sandstone.The dominant minerals in tuff are quartz and feldspar.The corresponding reservoir space is secondary porosity dominated by feldspar dissolved pore.
Tuff reservoir is characterized by medium -low porosity and small pore -throat with ultra -low permeability.The tiny
pore -throat and strong water -sensitive clay minerals dominated by illite -smectite results in ultra -low permeability.According to the intersection plot of logging curves ,tuff reservoir is featured by low DEN ,relatively high GR and AC and lower R t .This research could provide certain guidance for the further exploration of tuff reservoirs in this ar-ea.Key words :tuff ;reservoir property ;logging identification ;Sha1Member ;Dehui fault depression
0一引一言
随着全球对油气资源需求量的不断加大和常
规油气资源的不断减少,非常规油气逐渐成为新的勘探开发领域,在能源结构中所占比例越来越大[1]三其中,致密油气藏已成为油气储量增长的新突破口三目前,世界上大部分地区均发现了致密油气资源,如美国的德克萨斯南部的Eagle Ford 页万方数据