Formation Mechanism of Chang 6 Tight Sandstone Reservoir in Jiyuan Oilfield,Ordos Basin
Ren Dazhong
Sun Wei
Huang Hai
Liu Dengke
QXuefeng
Lei Qihong
Abstract：Despite the abundance of crude oil reserves of Chang 6 reservoir in Jiyuan oilfield,Ordos Basin,its tightness restricts the exploration and development potential and evaluating precision.The physical property,grading analysis,casting thin slice, X-ray-diffraction,the SEM and mercury injection experiments are adopted for the study of reservoir features.Taking the time as the main axis,combining diagenetic history,burial history,paleotemperature history and tectonics,the diagenetic modeling and geologic simulation are adopted to work out pore evolution model and computational method for the tight reservoir??s forma-tion mechanism.The results show that low and ultra-low porosity and permeability tight sandstone reservoir with micro-nano pore-throat system was due to strong evolution of transformation.The porosity evolution in H53 Well shows that porosity in-creased and decreased has an impact on hydrocarbon filling.The difference and quality of the tight reservoir??s formation were studied by comparing porosity evolution path and oil saturation in maximum intergranular pore,dissolution,compaction and cementation samples.
Keywords：Jiyuan Oilfieldchang6 reservoirdiagenesisgeologic simulationporosity evolutionpetroleum geology
Publication Date：2016-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：10( 1735-1744 )