【摘要】 本文利用南皮凹陷三维地震资料,结合重矿物数据、单井砂岩含量、地震属性解释、地震相解释确定物源方向、古流向及砂岩含量等值线,分析沉积体在南皮凹陷内部的展布特征。结果表明:在孔二段沉积时期,南皮凹陷存在徐黑凸起、东光凸起、沧县隆起3个物源区,根据单井及连井地震相解释中的叠瓦状或S型前积反射结构,确定了携带沉积物的古水流前进方向,并根据被解释为滨浅湖相的高振幅、高频、高连续平行地震反射结构圈定砂体的沉积边界,认为乌7井、乌12井、乌深1井附近存在双向的古水流,而叶21井、叶22井的古水流直接指向湖泊之中。综合上述分析,结合砂岩含量等值线图可知,部分徐黑凸起物源与东光凸起物源在南皮凹陷形成双物源混和沉积,而沧县隆起物源直接沉积于南皮凹陷滨浅湖中。更多还原

【Abstract】 An analysis of provenance,paleocurrent,sandstone content isogram and distribution characteristics of sand bodies at Ek2 in Nanpi Sag has been conducted mainly based on 3D seismic data,combined with heavy minerals,sandstone content of single wells,seismic attributes and seismic facies interpretation.The results demonstrate that there are three main material source areas at Ek2 in Nanpi Sag: Xuhei salient,Dongguang salient,and Cangxian uplift.Then paleocurrent has been determined by the imbricate or S-type progradational reflection configuration of delta facies from seismic facies interpretation of single well and crosswell seismic profiles.And sand body boundaries have been determined by high amplitude,high frequency,high continuous parallel seismic reflection configuration from the seismic facies interpretation of lacustrine facies.The sandstone content isograms are obtained.The two-direction paleocurrents with a portion of sediment from Xuhei salient and Dongguang salient had come together near well Wu 7,Wu 12 and Wushen 1,producing mix-deposition material source with the relatively high sandstone content.Nevertheless the sediment from Cangxian uplift definitely deposited in coastal shallow lake following the paleocurrent passed by well Ye 21 and Ye 22 in Nanpi sag.更多还原