【摘要】 琼东南盆地中央峡谷为一大型轴向峡谷体系,具有明显的"分段性"特征,不同区段沉积充填和内部结构均存在明显的差异,其中陵水段位于峡谷西段,具有非常好的储层物性特征,是深水区峡谷勘探的重点区域。为了进一步精细刻画陵水段峡谷内部水道复合体的沉积充填及沉积微相展布特征,本文借助新增加的三维地震资料和新钻井资料,通过峡谷三级层序界面的识别,将峡谷充填划分为3个三级层序SQ1、SQ2和SQ3,并通过古生物有孔虫化石带、钙质超微化石带及井-震结合确定了峡谷底界为中中新世晚期S40界面,陵水段峡谷自西向东依次识别出6种主要的内部充填结构,且将SQ3层序细分为5个次级层序(SSQ1~SSQ5);结合属性特征,精细刻画了陵水段峡谷内沉积微相平面展布及空间演化特征,并指出点砂坝在SSQ1层序最发育,且规模较大,横向上连片分布,将是下步勘探的有利储集体。更多还原

【Abstract】 The central canyon system(CCS)in Qiongdongnan Basin(QDNB),a large axial submarine canyon,can be characteriszed by"segmentation".Its different segmentation has different changes of sedimentary evolution and internal architectures of the CCS.The Lingshui segmentation of the CCS,located in the western of the canyon,is the key of the exploration of deep canyon area,with very good reservoir physical property.In order to further understand the sedimentary evolution and internal architectures of the channel-levee complexes of the Lingshui CCS(LSCCS)based on new 3Dseismic data and drilling-hole,the present study described and discussed internal architectures,paleontology chronostratigraphy and sequence stratigraphy of the drilling hole.We could divide five subsequence cycle for the Huangliu formation of the LSCCS,analyze the shaped and attributed characteristics in the seismic profile,and study the microfacies and their plane distribution in each sub-sequence cycle.By the study of sedimentary microfacies spatial evolution characteristics,it will be helpful for guiding the further oil and gas exploration.更多还原