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新北油田北部凹陷众多,成藏条件比较复杂,尤其是馆陶组上段。通过对岩心录井、测井曲线特征等分析,结合前人研究,对新北油田北部馆陶组上段沉积地层进行了重新划分,将前3个砂层组划分为12个小层,研究其地层发育特征。并以单井沉积相分析为基础,对新北油田北部馆陶组上段沉积相进行重新分析,认为该段为三角洲平原亚相,物源来自北东方向,主要发育分流河道、分流间湾、天然堤、决口扇等微相。在馆陶组上段沉积时期,沉积环境整体较稳定,沉积相展布变化不大,仅第二砂层组沉积时期,水体相对较动荡,砂体量、分流河道走向多变。
The north depression of Xinbei Oilfield is numerous with complicated reservoir forming conditions, especially the upper part of Guantao Formation. Based on the analysis of core logging and logging curve characteristics and combining with previous studies, the sedimentary strata in the upper part of Guantao Formation in the northern part of Xinbei Oilfield were re-divided into three layers, the first three sand layers were divided into 12 small layers, Developmental characteristics. Based on the analysis of single-well sedimentary facies, the sedimentary facies of the upper Guantao Formation in the northern part of Xinbei Oilfield are reanalyzed. The sedimentary facies of the upper Guantao Formation in the northern part of the Xinbei Oilfield is re-analyzed as a deltaic subfacies. The source of this sedimentary facies comes from the NE direction. The main distributary channel, shunt bay and natural Dike, Mau mouth fan and other micro-phase. During the sedimentary period of the Upper Member of the Guantao Formation, the depositional environment was stable as a whole, and the distribution of sedimentary facies did not change much. During the sedimentary period of the second sandstone formation, the water bodies were relatively turbulent, the volume of sand bodies and the diversion channels varied.