Identification method of fault connectivity path based on porosity analysis
A special type of fault-controlled fracture-cavity hydrocarbon reservoir is developed in Shuntoguole low uplift area of Tarim Basin.The heterogeneity and seepage capacity within the fracture zone are not clear,which affects the fine reserve production and injection-production well pattern construction in oil and gas field.The targeted layers in the study area has experience multiple tectonic movements,resulting in highly developed faults with complex spatial structures.In addition,the fault is the essential connectivity path between cavity reservoirs.Therefore,the analysis of the fault connectivity capacity and the connectivity path are the focus of the research.In this paper,the feasibility of seepage capacity characterization by porosity is verified in the work area.By assigning porosity to the fault surface,we determine the optimal connectivity trend by analyzing the porosity characteristics along different strike of the fault.Based on Dijkstra algorithm,the connectivity path with maximum pore space is automatically searched starting from the specified point on the fault surface.As well,the porosity distribution characteristics on the connectivity path are also well analyzed.Combined with the dynamic production data verification,the prediction and quantitative characterization of the connectivity path in the well group can be realized.The method provides reference basis for design and development of well group injection and production in oil and gas field.
Tarim BasinFault-controlled oil and gas reservoirsPorosityWell group connectivityConnectivity path
万方数据
维普
