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当钻井资料较少时,以岩心、测井等资料为补充地震属性分析,能较好地对沉积相展布进行研究。利用地质、测井、地震等资料,对松辽盆地南部长岭凹陷前七号地区青山口组沉积相进行综合研究,确认其为三角洲相沉积,并可进一步划分为三角洲平原亚相(发育分流河道、分流河道间、天然堤、决口扇等微相)和三角洲前缘亚相(发育水下分流河道、分支间湾、河口坝、远砂坝、前缘席状砂等微相)。通过绘制沉积微相平面分布图,建立该区青山口组沉积模式,为有利勘探区研究提供了依据。
When the drilling data are few, the analysis of sedimentary facies distribution can be studied well with core and logging data supplemented by seismic attribute analysis. The sedimentary facies of the Qingshankou Formation in the former No.7 area of Changling Depression in the southern Songliao Basin are comprehensively studied by using the data of geology, logging and earthquakes. The sedimentary facies of the Qingshankou Formation in the southern part of the Changling Sag in the Songliao Basin is confirmed to be deltaic facies and can be further divided into deltaic subfacies River channels, distributary channel, natural dike, rift fan and other microfacies) and the delta front subfacies (development of underwater distributary channel, inter-bay, estuary dam, far sand bar, sand front and other microfacies). By plotting the plane distribution of sedimentary microfacies, the depositional model of Qingshankou Formation in this area is established, which provides the basis for the research of favorable exploration area.