Sedimentological Influence on Physical Properties of a Tight Sandstone Reservoir: The Cretaceous Nenjiang Formation, Southern Songliao Basin, Northeast China

Abstract: The Nenjiang Formation, south of Songliao Basin, has many hydrocarbon bearing units, but currently the understanding distribution viable reservoir sandstones is too limited to support a development strategy. Therefore, detailed study on sedimentary microfacies and properties been completed in order reduce uncertainty improve subsurface predictions. Nine lithofacies five associations were identified supporting model river-dominated delta front setting, which could be divided into four environments: subaqueous distributary channel-fill, mouth bar, sand sheet, interdistributary bay. sandbodies extend tongue-like form, they thin pinch out. Finally, influence process was assessed by establishing correlation between physical parameters, such as porosity, permeability, pore radius, throat clay minerals. It revealed that correspondence types strong; channel bar are best.