论文详情
为推进珠江口盆地开平凹陷深水储层预测技术的应用, 利用三维地震资料、钻井记录及测井数据对研究区进行了层序地层划分和沉积体系研究, 分析了恩平组岩石物理特征。采用测井约束稀疏脉冲反演方法, 得出有利储层砂体的纵、横向展布规律。结合地震多属性分析方法, 沿层提取多种对地震信息敏感度不同的属性, 优选出3种相关性系数大的属性进行权重融合。钻井资料揭示开平凹陷始新统地层以埋深大、砂泥岩互层为主要特征。相较于文昌组, 恩平组砂岩储集条件优越, 孔渗性好, 是潜在的有利储层。综合恩平组沉积分布、储层特征、地震反演结果和地震属性融合结果, 认为连续且高波阻抗的三角洲砂岩层是较有利的油气储层。预测KP11构造带西北部为有利钻探区域, 并提交了一口有利钻探井位, 为未来油气勘探提供方向。
In order to comprehensively promote the application of deep-water reservoir prediction technology in the Kaiping sag, the Pearl River Mouth Basin, we conduct a study on stratigraphic division and depositional system, together with lithologic and petrophysical properties in the Enping Formation, based on 3D seismic, drilling, and logging data. The log-constrained sparse spike inversion is utilized to determine the spatial distribution of favorable sandstone reservoirs. Combined with the seismic multi-attribute analysis method, multiple attributes with varying sensitivities to seismic information were extracted along the layer. Three attributes with high correlation coefficients were selected for weight fusion. Drilling data reveal that deeply buried Eocene formations in the Kaiping sag consist of interbedded sandstones and mudstones. Sandstones in the Enping Formation have better reservoir properties, i.e. higher porosity and higher permeability, than in the Wenchang Formation. According to sedimentation, reservoir properties, seismic inversion results, and seismic attribute analysis, deltaic sandstones with good continuity and high impedance in the Enping Formation may function as promising reservoir rocks. The northwest of KP11 tectonic zone is predicted to be a promising area for drilling. A favorable drilling well location is proposed aiming to establish a theoretical direction for future oil and gas exploration.