渤海海域渤中地区中深层储层控制因素分析——以石臼坨凸起东段陡坡带沙河街组为例

CONTROLLING FACTORS OF MIDDLE-TO-DEEP RESERVOIR IN BOZHONG DEPRESSION,BOHAI SEA:AN EXAMPLE FROM SHAHEJIE FORMATION IN THE STEEP SLOPE BELT OF EASTERN SHIJIUTUO UPLIFT

根据石臼坨凸起东段陡坡带已钻井古近系岩心、测井以及各种分析化验资料,通过储层沉积学、岩石学和成岩作用的研究,详细论述了该区中深层沙河街组优质储层的控制因素,认为溶解作用和异常高压是该区中深层优质储层的主要控制因素。研究成果可供渤海海域地质条件相似的中深层勘探区块借鉴。

Based on analysis on some Palaeocene cores from the steep slope belt of eastern Shijiutuo Uplift and well-logging interpretation,the controlling factors of middle-to-deep Shahejie Formation,a high-quality reservoir,are presented by sedimentology and petrography as well as diagenesis study.It is considered that the main controlling factors include dissolution and abnormal high pressure.Moreover,all study results may guide an exploration of middle-to-deep reservoirs with similar geological conditions in Bohai Sea.