济阳断陷湖盆输导体系研究与实践

以济阳坳陷为例,在陆相断陷盆地输导体系要素及其输导空间型式分析基础上,提出了"网毯式"、"T型"、"阶梯型"和"裂隙型"四种输导体系典型样式.其中网毯式输导体系又可分为侧向斜坡模式和垂向断裂带模式,阶梯型输导体系可进一步划分为断裂-砂体模式和断裂-不整合模式.陆相断陷盆地不同发育阶段、不同构造部位发育不同类型的输导体系样式,它们共同组成了断陷盆地复式输导体系网络,控制了油气分层、油藏分类及分布特征.在高度概括陆相断陷盆地输导体系样式及分布特征的基础上,以网毯式和T型两种模式的成功勘探实践为例,说明断陷盆地输导体系样式不仅是不同地质要素的空间组合,还深刻表现了对成藏的控制作用,更深入反映了陆相断陷盆地油气的运聚规律,随着研究的深入和理论、方法的不断完善,必将在勘探中发挥更大作用.

Search and practice of the conduit systems in Jiyang depression, Shandong, China

Based on the conduit system elements analysis and the study of the special styles in Jiyang depression,combined with the mechanisms analysis of faults,fracture,frame sands and the unconformity beds,this paper illustrates the static style and the dynamic evolvement of the conduit systems in the rift basin.The conduit system styles of "net-carpet" model,"T" model,ladder model,and fracture model are identified.The "net-carpet" model includes the lateral slope model and up fault model.The ladder model includes the fault-sand model and fault-unconformable model.The paper points out that the different conduit system styles are located in different structure belts and different development stages.All the conduit systems constitute the "multiple-conduit systems network" in rift basins.This paper points out the conduit systems and their distribution rules control the classification,stratification and distribution of reservoirs in the manners of section and plane.Based on all this,two typical composite styles of conduit systems-ladder model and "T-S" model are illustrated in continental rift basin.This paper points out that the typical model of conduit systems control reservoirs is not only the composite styles of the conduit system but also the peculiar reflection of the conduit system controlled function and the rules of hydrocarbon migration and accumulation in rift basins.