Abstract: In continental dustpan-shaped depression,fan deltas mainly develop in fault-slope beltwhich is in steep shore region along the direction of short-axis in the depression.By means ofsedimentology,well-logging geology and seismic stratigraphy of Shahejie formation in Leng-dong-Leijia region in western part of Liaohe depression,two types of fan deltas are recognized,i.e,steep slope-pattern fan delta and gentle slope-pattern fan delta,and their sedi-mentary and reservoir features are discussed.The result provides important geological theo-retical basis for hvdrocarbon exploration and reservoir description of the fault slope of continertal dustpan-shaped deprsssion.

Key words: slope of west Liaohe Shahejie group fan(geology)delea facie sedirnentation characteristic seismic facies slope zone reservoir description

摘要： 在陆相箕状凹陷,特别是凹陷的短轴陡岸区,扇三角洲十分发育.通过对辽河坳陷西部凹陷冷东-雷家地区沙河街组的沉积学、地震地层学和测井地质学的研究,识别了两种类型的砾质扇三角洲沉积体系,即陡坡型扇三角洲和缓坡型扇三角洲,并对两类扇三角洲的沉积特征及其油气储层意义进行了阐述.这一研究为陆相箕状凹陷断坡带的油气勘探和油藏描述提供了重要的地质理论依据.

关键词: 辽河西斜坡, 沙河街组, 扇(地质), 三角洲相, 沉积特征, 地震, 相, 斜坡带, 储集层描述