【摘要】 通过岩心描述、钻测井和地震资料分析,认为春光探区沙湾组发育冲积扇、辫状河和辫状河三角洲等3种沉积相;沙一段发育冲积扇-辫状河沉积体系,沙二段发育辫状河-辫状河三角洲沉积体系。结合车排子凸起构造演化特征,确定了沙湾组沉积演化特征,指出辫状河和辫状河三角洲平原河道是有利沉积相带。通过研究沉积相对圈闭发育的控制作用,认为河道侧缘尖灭带是岩性圈闭发育的有利区带,在此基础上认识到砂组尖灭线控制了沙湾组岩性油气藏的"带状"分布格局。更多还原

【Abstract】 Through analysis of core descriptions,drill logs and seismic data,it is believed that three kinds of sedimentary facies have been developed in Chunguang exploration area,namely alluvial fan,braided river and braided river delta.In Sha-1st member,it is developed alluvial fan and braided river delta sedimentary system.In Sha-2nd member,it is developed braided river-braided river delta sedimentary system.In combination with tectonic evolution characteristics of Chepaizi uplift,the sedimentary evolution of Shawan formation has been determined.The braided river and braided river delta Plain River are favorable sedimentary facies.By studying the control of sedimentary facies on trap development,the lateral pinchout zone is believed to be favorable for lithologic trap development,and on the basis of it,it is recognized that the banded distribution pattern of lithologic reservoir is controlled by the pinchout line.更多还原