琼东南盆地陵水组层序地层与沉积相分析

利用高分辫率层序地层学方法,结合岩心?测井和地震资料,识别琼东南盆地陵水组各级层序界面,建立地层层序格架,探讨地层格架下沉积相类型?演化规律以及平面展布,并就有利沉积相带分布进行了讨论?结果表明:从测井资料看出,层序界面识别标志主要为岩性和颜色发生突变;将琼东南盆地陵水组划分为3 个三级层序(Els1?Els2和Els3);结合测井响应特征,对地震剖面进行精细刻画,在3 套三级层序中识别出辫状河三角洲?扇三角洲?滨海?陆棚?碳酸盐台地等5种沉积相?

The sequence stratigraphy and sedimentary facies analysis of Lingshui Formation in Qiongdongnan Basin

Using the high resolution sequence stratigraphy and the correlation analysis of cores, logs and seismic data, the authors identified various stratigraphic sequence interfaces in Lingshui Formation of Qiongdongnan Basin, built the stratigraphic framework, and discussed the sedimentary facies types and the evolution and distribution of the framework, and forecast the distribution of favorable sedimentary reservoirs. The results show that the recognition criteria of stratigraphic sequence interface seem to be the significant changes of lithology and color. The Lingshui Formation of Qiongdongnan Basin is divided into threeorder strata sequences (Els1, Els2, and Els3). Five types of sedimentary facies are developed in this three sets of third- order sequences, which include braided river delta, fan delta, littoral area, continental shelf and carbonate platform.