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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。
Based on the three-dimensional seismic data of Nanpi Sag and the data of heavy minerals, single-well sandstone content, seismic attribute interpretation and seismic facies interpretation, the orientation of provenance, paleocurrent direction and sandstone content are determined, Cloth features. The results show that there are three provenance areas of Xuhui, Dongguang and Cangxian uplifts in Nanpi depression during the deposition of the second member of Konggong Formation. According to the superimposed or S-shaped According to the high amplitude, high frequency and high continuous parallel seismic reflection structure, which is interpreted as the shallow lake facies, delineating the sedimentary boundary of the sand body, it is considered that Wu 7 well, Well Wu 12 and Wushen 1 have a two-way paleo-water flow near the well, whereas the ancient water flow in Ye 21 and Ye 22 wells directly points into the lake. Based on the above analysis, it can be seen from the contour map of sandstone content that part of the source rocks of the Xuheigou and the source of the East Light Bulge formed a dual-source mixed deposition in the Nanpi Sag, whereas the source of the Cangxian uplift directly deposited in the Nanpi Sag Shore shallow lake.