CHARACTERISTICS OF THE C-2 RESERVOIR IN MANING AREA OF ORDOS BASIN

Due to the lack of research on sedimentary microfacies and reservoir characteristics of Maning area in Jingbian oilfield, Ordos Basin, the exploration and development in the area is limited at present. Based on core observation, thin section analysis, physical testing, scanning electron microscopy and mercury intrusion curve data, the reservoir characteristics are studied and the reservoir quality is classified. The results show that the C-2 reservoir in Maning area is dominated by fine-grained feldspathic sandstone, with matrix primarily composed of hydromica and chlorite, cemented by calcite, silica and dolomite. The main reservoir spaces are intergranular dissolved pores and ethylene pores. The pore throat of the sandstone reservoir has good connectivity and sorting. The C-2 reservoir formation in Maning area is characterized by low-medium permeability and low-medium porosity.