【摘要】 利用高分辨率层序地层学方法,结合岩芯、测井和地震资料,识别辽河西部凹陷欢喜岭地区各级层序界面,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:从钻测井资料看出,层序界面识别标志主要为岩性和颜色发生突变,沉积相类型发生突变,电性特征发生明显变化等;将欢喜岭地区沙河街组划分为6个三级层序,12个四级层序;沙河街组三段发育扇三角洲、湖底扇和湖泊相等沉积相类型,其中,上亚段扇三角洲发育,中亚段广泛发育湖底扇相沉积,下亚段以深湖、滨浅湖相为主,斜坡边缘发育扇三角洲沉积;沙河街组三段中亚段湖底扇相和下亚段扇三角洲相的储集物性最好,为有利沉积相带。更多还原

【Abstract】 With the high resolution sequence stratigraphy and the correlation analysis of cores,logs and seismic data,different orders of stratigraphic sequence interface were identified for the third member of Shahejie Formation of Huanxiling Area in the west depression of Liaohe Basin,the stratigraphic framework was built,the types of sedimentary facies,evolution and distribution of the framework were discussed,and the distribution of favorable sedimentary reservoir was forecasted.The results showed that the recognition marks of stratigraphic sequence interface were the significant changes of lithology,color,type of sedimentary facies and electricity character;Shahejie Formation of Huanxiling Area was divided into 6 three-order strata sequences and 12 four-order strata sequences;fan dalta,sublacustrine fan and lacustrine facies were developed in the third member of Shahejie Formation,fan dalta was developed in the upper subsection,sublacustrine fan was widely developed in the middle subsection,deep,littoral and shallow lacustrine facies was mainly developed in the lower subsection;reservoir physical properties of sublacustrine fan in the middle subsection of the third member of Shahejie Formation and fan dalta in the lower subsection were best,and it was the favorable sedimentary reservoir.更多还原