摘要
Effective carrier system comprises carrier beds which transport hydrocarbons.The spatial and temporal effectiveness of carrier system is identified according to the relevance of hydrocarbon show,hydrocarbon inclusion and sealing ability of fault to hydrocarbons distribution,together with matching relation of activity history of fault and hydrocarbon generation history of source rock.On the basis of the above considerations,transporting ability of effective carrier system can be evaluated using parameters such as fluid potential,porosity and permeability,spatial coefficient of effective pathway as well as activity rate of fault.Additionally,a new concept of "transporting threshold porosity" was proposed.Five styles of effective carrier systems were established in Gaoyou Sag,displaying either layered or zonal distribution characteristics,and transporting time ranges from the sedimentary time of E2d2 to early stage of sanduo uplift.Effective carrier systems can be described to be lowly-efficient and highly-efficient.Major faults (convex or steep fault plane) with activity rate greater than 20 m/Ma and structure ridges of sand layers with spatial coefficient of effective pathway greater than 25% are defined to be highly-efficient carrier beds.Hydrocarbons are concentrated around high-efficient carrier beds and E1 f traps of northern shanian area are predicted to have great potential.
Effective carrier system comprises carrier beds which transport hydrocarbons. The spatial and temporal effectiveness of carrier system is identified according to the relevance of hydrocarbon show, hydrocarbon inclusion and sealing ability of fault to hydrocarbons distribution, together with matching relation of activity history of fault and hydrocarbon generation history of source rock. On the basis of the above considerations, transporting ability of effective carrier system can be evaluated using parameters such as fluid potential, porosity and permeability, spatial coefficient of effective pathway as well as activity rate of fault. Additionally, a new concept of"transporting threshold porosity" was proposed. Five styles of effective carrier systems were established in Gaoyou Sag, displaying either layered or zonal distribution characteristics, and transporting time ranges from the sedimentary time of Ezdz to early stage of sanduo uplift. Effective carrier systems can be described to be lowly-efficient and highly-efficient. Major faults (convex or steep fault plane) with activity rate greater than 20 m/Ma and structure ridges of sand layers with spatial coefficient of effective pathway greater than 25% are defined to be highly-efficient carrier beds. Hydrocarbons are concentrated around high-efficient carrier beds and E1 f traps of northern shanian area are predicted to have great potential.
基金
Project(P08045)supported by Geological Research Institute of Jiangsu Oilfield Company,SINOPEC,China
关键词
载体系统
高邮凹陷
苏北盆地
油气成藏
评价
碳氢化合物
中国
沉积时间
effective carrier system
transporting threshold porosity of carrier beds
fluid potential
hydrocarbon migration
GaoyouSag