摘要
针对琼东南盆地深水深层勘探中,恒流变FLAT⁃PRO合成基钻井液因含高浓度荧光添加剂,导致传统三维定量荧光录井(3D⁃QF)存在背景干扰与荧光淬灭,难以精准识别油气显示的技术难题,聚焦于消除或弱化恒流变FLAT⁃PRO合成基钻井液对三维定量荧光录井的影响。通过分析合成基钻井液添加剂荧光图谱特征、设计原油样与钻井液滤液的梯度混合实验,明确干扰机制,建立了标准化扣除钻井液背景图谱的方法,用于识别储层含油特征并开展定量评价。经LX 30⁃1、LX 30⁃2井现场应用验证,该方法能快速、准确识别油气显示,显著提升了合成基钻井液条件下三维定量荧光录井的检测精度与可靠性,为复杂地层油气勘探提供有效技术支撑。
In deep⁃water exploration in Qiongdongnan Basin,the constant rheology FLAT⁃PRO synthetic⁃based drilling fluid contains high concentrations of fluorescent additives,which causes traditional 3D quantitative fluorescence(3D⁃QF)logging to be affected by background interference and fluorescence quenching,making it difficult to accurately identify oil and gas shows.To address this issue,this study focuses on eliminating or mitigating the interference of the constant rheology FLAT⁃PRO synthetic⁃based drilling fluid on 3D⁃QF logging.By analyzing the fluorescence spectral characteristics of synthetic⁃based drilling fluid additives and designing gradient mixing experiments of crude oil samples with drilling fluid filtrate,the interference mechanism is clarified.A standardized method for subtracting the drilling fluid background spectrum is established,which enables effective identification of reservoir oil⁃bearing characteristics and quantitative evaluation.Field applications in wells LX 30⁃1 and LX 30⁃2 have verified that this method can rapidly and accurately identify oil and gas shows,significantly improving the detection accuracy and reliability of 3D⁃QF logging under synthetic⁃based drilling fluid conditions.This research provides effective technical support for oil and gas exploration in complex formations.
作者
胡潇潇
廖高龙
吕文海
孙本飞
张国梁
HU Xiaoxiao;LIAO Gaolong;LYU Wenhai;SUN Benfei;ZHANG Guoliang(Beijing Yongshengtong Technology Development Co.,Ltd.,Beijing 100080,China;CNOOC China Limited Hainan Company,Haikou,Hainan 570206,China)
出处
《录井工程》
2026年第1期112-118,共7页
Mud Logging Engineering
关键词
恒流变
FLAT⁃PRO
合成基钻井液
三维定量荧光录井
图谱对比
constant rheology
FLAT⁃PRO
synthetic⁃based drilling fluid
3D quantitative fluorescence logging
spectrum comparison
