华北中南部博山地区上古生界沉积相与沉积演化特征

随着中浅层油气勘探进入中高成熟阶段，华北地区上古生界已成为油气勘探和储量接替的重要领域，对上古生界沉积相类型及沉积演化过程进行深入研究对于油气勘探具有一定的指导意义。以沉积学理论为指导，以华北中南部淄博博山上古生界露头剖面为基础，通过详细踏勘实测，识别其发育的沉积相类型与沉积序列，明确其沉积演化过程。研究结果表明:淄博博山地区上古生界自下而上可分为本溪组、太原组、山西组、下石盒子组、上石盒子组和石千峰组，共识别出障壁海岸、潮流、碳酸盐台地、三角洲和曲流河5种沉积相及8种典型沉积序列；本溪组-太原组发育障壁海岸相和碳酸盐台地相，山西组发育三角洲相，下石盒子组-石千峰组发育河流相和潮流相；研究区上古生界经历了由障壁海岸-台地复合沉积体系过渡为三角洲相，最终转变为河流相的沉积演化过程。

Sedimentary Facies and Their Evolution Characteristics of Upper Paleozoic in Zibo Boshan Area,Central and Southern Region of North China

Along with oil and gas exploration of middle-shallow layers entering into medium-high maturity stage, the Upper Paleozoic of North China has become an important area for petroleum exploration and reserves replacement. The study of sedimentary facies and sedimentary evolution process in the Upper Paleozoic had a guiding role for oil and gas exploration. This research was guided by sedimentology theory, based on the outcrop section in the Upper Paleozoic of Zibo Boshan area, central-southern of North China, identified the sedimentary facies types and sedimentary sequence, and ascertained the sedimentary evolution process through the detailed field reconnaissance. Research showed that:it can be divided into Benxi Formation, Taiyuan Formation, Shanxi Formation, lower and upper Shihezi Formation and Shiqianfeng Formation from bottom to top of Zibo Boshan area in the Upper Paleozoic, identified 5 type of sedimentary facies(barrier coast, tide, carbonate platform, delta, meandering river) and 8 type of typical sedimentary sequences. Benxi and Taiyuan formation develop barrier coast and carbonate platform facies; Shanxi Formation develops delta facies;Lower and upper Shihezi Formation and Shiqianfeng Formation develop fluvial facies and tide. Upper Paleozoic of Zibo Boshan area experienced a sedimentary evolution process transition from the barrier coast-platform complex sedimentary system to delta facies, and finally turn into fluvial facies.