渤海海域沙南凹陷烃源岩TOC测井预测模型优选及应用

• Published in: Hăiyang dĭzhĭ yu dĭsĭjĭ dĭzhĭ Vol. 40; no. 5; pp. 182 - 191
• Main Authors: XU Shikun, YE Jiaren, YANG, Baolin, ZHAO Niubin
• Format: Journal Article
• Language: Chinese
• Published: Beijing Marine Geology and Quaternary Geology 01.01.2020; 中国地质大学(武汉)构造与油气资源教育部重点实验室,武汉 430074
• Subjects: Carbon; Case studies; Core drilling; Cores; Data logging; Distribution patterns; Drilling; Earth science; Evaluation; Experiments; Hydrocarbons; Logging; Methods; Mudstone; Natural gas; Natural gas exploration; Oil; Oil and gas exploration; Oil exploration; Optimization; Petroleum geology; Prediction models; Rock; Rocks; Sag; Sediment samples; Total organic carbon; Vertical distribution; Well logging; Wells; Ordos Basin; China; Bohai Sea; 烃源岩; 测井评价; 沙南凹陷; 有机碳含量
• ISSN: 0256-1492
• DOI: 10.16562/j.cnki.0256-1492.2019092901

针对渤海海域沙南凹陷油气勘探程度低，烃源岩样品取芯少，连续性差，烃源岩研究薄弱及勘探潜力争议较大等问题，基于沙南凹陷内6口单井的测井资料及泥岩样品实测TOC数据，分别应用多元线性回归法和改进的ΔlgR法分层段建立沙南凹陷东三段、沙一二段、沙三段烃源岩TOC定量预测模型，对比优选后发现改进的ΔlgR法和多元线性回归法中的四参数线性回归法可有效地预测沙南凹陷单井湖相烃源岩TOC纵向分布，并以改进的ΔlgR法最优；选取改进的ΔlgR法预测TOC曲线对两口代表性单井烃源岩进行评价，结果表明沙三段具有烃源岩占比地层厚度高、TOC高、好—优质烃源岩厚度大等特点，为凹陷主力烃源岩系，沙南凹陷勘探前景广阔。