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在层序地层理论指导下,借助高分辨率三维地震资料,利用地震沉积学研究手段,分析研究了北部湾盆地西部地区主要目的层段涠洲组层序及沉积体系展布规律。结果表明,研究区具有多(双)断控型层序构型,涠西南低凸起的存在对于沉积体系分配具有重要的控制作用。结合古地形分析,认为涠洲组沉积时期物源来自三个方向,形成典型的多向三角洲朵体,其中三角洲前缘坝和远端砂是潜在的有利对象,由此提出了有利砂体发育预测模型。
Under the guidance of sequence stratigraphy theory, with the help of high-resolution 3D seismic data and the research of seismic sedimentology, the sequence of the Weizhou formation in the main target layer in the western Beibuwan Basin and the distribution rules of the sedimentary system are analyzed. The results show that the study area is characterized by multi-(double) controlled sequence type sequence, and the existence of low relief in the southwestern part of 涠 plays an important role in controlling the depositional system. Based on the analysis of palatoplats, it is concluded that the sedimentary period of the Weizhou Formation originated from three directions and formed typical multi-directional delta bodies. Among them, the delta front dam and the remote sand are potentially favorable targets. Therefore, favorable sand body development Predictive model.