Study on pore structure and physical properties of Chang 6 reservoir in Dalugou area,Ordos Basin
In oil and gas exploration and development,the pore structure of reservoir rocks can effect on reserves,productivity and recovery efficiency of the oil and gas.In particular,parameters of pore structure can be used to characterize the quality of reservoir pores and play an important role in exploration and development of oil and gas.Therefore,this paper focused on the Chang 6 reservoir in the Dalugou area of the Ordos Basin,and took a de-tailed analysis of the pore structure and physical properties.The lithology of Chang 6 reser-voir in the study area is mainly feldspar sandstone and lithic feldspar sandstone.Its porosity ranged from 9％ to 15％,and its permeability from 0.3 mD to 1.5 mD.The Chang 6 reservoir in the study area,based on sedimentary cycles,was divided into three sub layers,Chang 61,Chang 62 and Chang 63.The physical properties of each sub layer varied greatly,with the Chang 61 sub layer having the best physical properties,but the Chang 63 sub layer having the worst physical properties.According to the above conclusions,it is concluded that Chang 6 reservoir belongs to low porosity and low permeability reservoir.
万方数据
维普
