松科二井东孔营城组火山岩测井响应特征及岩性评价  

Log response characteristics and lithological evaluation of volcanic rocks in Yingcheng Formation from the second scientific drilling borehole (SK-2 east borehole) in Songliao basin of Northeast China

作　　者：赵金环[1,2] 邹长春[1,2] 王稳石 张小环 朱永宜[3] 张金昌[3] 张恒春 丁娱娇 林峰 秦宇星 周海 孙文龙 ZHAO Jinhuan;ZOU Changchun;WANGWenshi;ZHANG Xiaohuan;ZHU Yongyi;ZHANG Jinchang;ZHANG Hengchun;DING Yujiao;LIN Feng;QIN Yuxing;ZHOU Hai;SUNWenlong(Key Laboratory of Geo-detection,Ministry of Education,China University of Geosciences(Beijing),Beijing 100083,China;School of Geophysics and Information Technology,China University of Geosciences,Beijing 100083,China;Institute of Exploration Techniques,China Geological Survey,Langfang 065000,Hebei,China;Tianjin Branch,CNPC Logging,Tianjin 300280,China)

机构地区：[1]中国地质大学(北京)地下信息探测技术与仪器教育部重点实验室,北京100083 [2]中国地质大学(北京)地球物理与信息技术学院,北京100083 [3]中国地质调查局勘探技术研究所,河北廊坊065300 [4]中国石油集团测井有限公司天津分公司,天津300280

出　　处：《中国地质》2019年第5期1174-1183,共10页Geology in China

基　　金：中国地质调查局地质调查专项（12120113017600）,中国地质调查局公益性基础地质调查项目（DD20179362）联合资助;国家自然科学基金重大项目专题（41790455-1）~~

摘　　要：为开展松辽盆地深部长期观测、流体实验和探索白垩纪火山事件,利用松科二井东孔丰富、齐全的测井资料,对营城组火山岩岩性进行评价。通过测井响应特征分析发现,松科二井东孔营城组凝灰岩具有最强的放射性和导电性,高孔隙度的集块熔岩密度为低值,流纹岩表现出高密度和低导电性。利用测井交会图和成像识别模式,识别出松科二井东孔营城组火山岩以流纹岩、凝灰熔岩和集块熔岩为主,少量的凝灰岩。结合凝灰岩处测井曲线变化特点,证明了火山喷发间断的存在。流纹岩具有高碱、高Si、低Fe和低黏土矿物特征。T2谱分析认为流纹岩有利于后期深部长期观测和流体实验的开展。研究成果对松科二井东孔后续火石岭组火成岩及整个松辽盆地火山岩研究具有一定的参考价值。In order to conduct long-term deep observation,fluid experiments and investigate volcanic events in Songliao basin,the authors carried out lithological evaluation of volcanic rocks in Yingcheng Formation by using abundant and complete geophysical logs from SK-2 east borehole.The log response analysis of volcanic rocks shows that the radioactivity and electric conductivity of tuffs are the strongest.Agglomeratic lavas have low density because of high porosity.The density of rhyolites is the highest and the electric conductivity is the weakest.Volcanic rocks of Yingcheng Formation along SK-2 east borehole consist of rhyolites,transitional tuffl lavas,agglomeratic lavas and a little tuffs by using cross plots and imaging models.A volcanic eruptive gap may exist,as evidenced by tuff with high GR,low RD and low DEN.Rhyolites are characterized by high alkali,high Si,low Fe and low clay mineral.T2 analysis suggests that the rhyolites are favorable for carrying out long-term observations and fluid experiments.The results provide a reference of interpretation for subsequent volcanic rock in Huoshilin Formation and research of volcanic rocks in the whole basin.

关 键 词：深地勘查工程 松科二井东孔 火山岩 测井响应特征 岩性评价 

分 类 号：P588.14[天文地球—岩石学] P613.8[天文地球—地质学]