长岭断陷查干花次凹火石岭组水下喷发火山岩相测井响应特征  

Logging Response Characteristics of Subaqueous Eruptive Volcanic Facies of Huoshiling Formation in Chaganhua Subdepression,Changling Fault Depression

作　　者：李永刚[1] Li Yonggang(Northeast Oil and Gas Branch,SINOPEC,Changchun 130062,China)

机构地区：[1]中国石化东北油气分公司,长春130062

出　　处：《吉林大学学报（地球科学版）》2024年第6期2061-2074,共14页Journal of Jilin University：Earth Science Edition

基　　金：国家自然科学基金项目(41972313)。

摘　　要：松辽盆地长岭断陷查干花次凹火石岭组发育水下喷发火山岩,分为2类岩相4种亚相,在取心井段较少的情况下,实际生产中识别水下喷发火山岩相具有较大困难。本文以查干花地区水下喷发火山岩相为研究对象,分析总结了2类岩相4种亚相的电性特征:气携水下热碎屑流亚相火山灰球不发育段为高自然伽马、高电阻率,曲线呈中高幅指形,成像测井为高阻亮色,火山灰球发育段为低自然伽马、低电阻率,曲线中低幅较平直,成像测井为低阻暗色;水携火山高密度流亚相为高自然伽马、高电阻率,曲线呈中高幅指形,成像测井为高阻亮色;水下降落亚相为高自然伽马、低电阻率,曲线中低幅较平直或呈中高幅指形,成像测井为低阻暗色;含外碎屑火山碎屑沉积岩亚相为低自然伽马、高电阻率,曲线呈中高幅指形,成像测井为高阻亮色。建立了岩相测井识别图版,实现了水下喷发火山岩相测井识别。There are subaqueous eruptive volcanic rocks in Huoshiling Formation of Chaganhua subdepression,Songliao basin,which are divided into two types of lithofacies and four types of subfacies.It is difficult to identify the subaqueous eruptive volcanic facies in actual production when there are few well cores.Taken the subaqueous eruptive volcanic facies of Chaganhua area as the research object,the logging characteristics of four subfacies of two types of lithofacies are analyzed and summarized in this paper:The undeveloped section of volcanic ash ball of the gas-carried subaqueous pyroclastic flow subfacies is high natural gamma and high resistivity,the curve is in the shape of medium-high amplitude finger,and the imaging logging shows high resistivity bright color.The developed section of volcanic ash ball is low natural gamma and low resistivity,the curve is flat with low amplitude,and the imaging logging shows low resistivity dark color.The water-carried volcanic high density flow subfacies is high natural gamma and high resistivity,the curve is in the shape of high amplitude finger,and the imaging logging shows high resistance bright color.The subaqueous landing subfacies is high natural gamma and low resistivity,the curve is low amplitude flat or in the shape of high amplitude finger,and the imaging logging shows low resistivity dark.The exoclastic pyroclastic sedimentary rock subfacies is low natural gamma and high resistivity,the curve is in the shape of high amplitude finger,and the imaging logging shows high resistivity bright color.The lithology logging recognition chart is established and the subaqueous eruptive volcanic lithology logging recognition is achieved.

关 键 词：查干花地区 长岭断陷 水下喷发 火山岩相 电性特征 松辽盆地 

分 类 号：P168.13[天文地球—天文学]