构造作用与济阳坳陷上第三系油气成藏  

Tectonic action and oilgas reservoir forming in Neogene of Jiyang Depression.

作　　者：董波[1] 

机构地区：[1]胜利油田有限公司勘探项目管理部

出　　处：《油气地质与采收率》2004年第3期25-27,30,共4页Petroleum Geology and Recovery Efficiency

摘　　要：从渤海湾盆地区域地质背景和断裂作用等方面入手 ,对济阳坳陷上第三系油气成藏特点和主要控制因素进行了探讨。提出上第三系油气成藏具有源控、相控、断控、盖控等特点。下第三系沉降沉积中心的迁移对上第三系油气藏的形成和分布具有重要作用 ,上第三系油气主要富集于坳陷东北部环渤海地区 ,主要原因是沉降沉积中心的迁移造就了晚期成藏的优越条件。断层对油气纵向运移并形成上第三系馆陶组厚层砂岩体油气聚集发挥了重要作用。油气沿断裂的运移呈幕式 ,切入烃源岩的断裂类似于潜水泵 ,周期性地将油气输送到上覆层系 ,与横向连通砂体构成立体网状运移体系。Based on the regional geologic setting and the fault action in Bohai Bay Basin, the characteristics and key controlling factors of oilgas reservoir forming of Neogene in Jiyang Depression have been discussed in this paper. Some major characteristics, such as source controlling, facies controlling, fault controlling, seal controlling and so on, have been brought forward. The migration of subsidencesedimentation center in Neogene system greatly affected the formation and distribution of oilgas reservoirs in Neogene. The reason that the most of oil and gas in Neogene is accumulated in the region around the Bohai Sea, northeast part of Jiyang Depression, is that favorable conditions to late oilgas reservoir forming come into being because of the migration of subsidencesedimentation center. In vertical migration of oilgas and its accumulation in thick sand body in Guantao Formation, Neogene, faults play a very important role. Oilgas migration along faults takes the episodic form, and fractures cut in source rocks are like immersible pumps, through which oilgas is transmitted to overlying formations periodically. Fractures, together with sand body connected with each other laterally, make up threedimensional, netlike transmission systems. Low uplifts in sags whose formation is controlled by fractures are the most favorable structure to oilgas accumulation.

关 键 词：济阳坳陷 油气成藏体系 构造作用 渤海湾盆地 油气运移 断层 

分 类 号：P618.13[天文地球—矿床学]