摘要
通过实施土壤样品采集和实验测试,分析包括烃类、蚀变碳酸盐和热蚀汞等地球化学特征,统计异常值并获取异常下限。进行综合化探异常研究,识别出一套重烃、蚀变碳酸盐和热蚀汞的双峰式异常组合。依据异常组合优选了油砂勘探目标区,并实施钻探验证,钻获白垩统姚家组饱含油、油浸级别油砂岩芯,最高含油率达12.86%,平均含油率达5.40%,钻获单井油砂最大净厚度达12.40 m,钻探验证效果与异常特征吻合度良好,证实该方法有效应用于松辽盆地西斜坡小太平山地区油砂勘查工作,为类似油砂矿的地表油气地球化学勘探提供了案例。
Based on the soil sample collection and testing,the geochemical characteristics,such as hydrocarbons,altered carbonate and thermal released mercury were analyzed,and the abnormal values were counted and the lower limit of the anomalies was obtained.From the comprehensive geochemical anomalies,a set of two-peak anomaly combination is identified,which is associated with heavy hydrocarbons,altered carbonate and thermal released mercury.In accordance with that characteristic of the anomaly,the target area of the oil sand exploration is delineated.Drilling data confirm that the core is oil-rich or oil-immersed in Yaojia Formation of Cretaceous,and the highest oil content is 12.86%,the average oil content is 5.40%,the maximum net thickness of oil sand is12.40 m.The high correlation between the drilling verification and the geochemical anomaly proves that the method is effective in oil sand prospecting in Xiaotaipingshan area in the western slope of Songliao Basin.Meanwhile,it provides a reference for surface oil and gas geochemical exploration of similar oil sand.
作者
仝立华
郝国丽
杨孝杰
邰文超
李锋
徐银波
刘轶松
王洁宁
TONG Li-hua;HAO Guo-li;YANG Xiao-jie;TAI Wen-chao;LI Feng;XU Yin-bo;LIU Yi-song;WANG Jie-ning(Oil&Gas Survey,China Geological Survey,Beijing 100083,China;The Key Laboratory of Unconventional Petroleum Geology,China Geological Survey,Beijing 100083,China;College of Earth Sciences,Jilin University,Changchun 130061,China;Jilin Geological Exploration Institute,China Chemical Geology and Mine Bureau,Changchun 130033,China;Oil Sands Geological Survey and Technology Research and Development Laboratory,Oil&Gas Survey,CGS and China Chemical Geology and Mine Bureau,Changchun 130033,China;Gems&Jewelry Trade Association of China,Beijing 100013,China)
出处
《世界地质》
CAS
2019年第4期1063-1072,共10页
World Geology
基金
中国地质调查局地质调查项目(DD20160188,DD20189606)
关键词
地表油气地球化学技术
综合地化异常
油砂勘查
小太平山
松辽盆地
surface oil and gas geochemistry technique
comprehensive geochemical anomalies
oil sand prospecting
Xiaotaipingshan
Songliao Basin
