东营凹陷北部陡坡带沙四段砂砾岩体沉积模拟实验研究

摘要

东营凹陷北部陡坡带近岸水下扇砂砾岩体是胜利油田油气勘探的新兴领域,具有良好的勘探前景.在已有的区域构造、古地貌、沉积特征等研究基础上,应用沉积模拟研究技术设计了实验方案,对研究区近岸水下扇的形成过程及沉积微相特征进行研究.实验条件下,研究区近岸水下扇砂砾岩体可划分为扇根、扇中、扇端3个亚相.基底沉降、物源供给、水流量变化、湖平面升降等是影响近岸水下扇形成和演化的主要控制因素.%The nearshore subaqueous fans at the steep slope in northern Dongying sag is a new field of Shengli Oilfield.It is an object with most exploration value.Based on the study of regional tectonic,ancient landform,sedimentary characteristics of the study area,experimental program was designed by using the technology of sedimentation simulation,the formation process of the nearshore subaqueous fans and the sedimentary microfacies feature were studied.The experiment shows that the study area can be divided into 3 subfacies.It is proved that basement subsidence,amount of adding sand and mud,flow fluctuation,relative lake level changes and so on are the main controlling factors influencing the formation and evolution of nearshore subaqueous fans.