The Research Of Oil-water Relative Permeability In High Temperature Conditions And Flushing Efficiency In NH Oilfield

The temperature and pressure in most of the reservoirs in the NH oilfield is high.The proportion of heavy oil in the explored reserves is obviously increased,the viscosity of the oil is increasing and the drilling for oil is more and more difficulty.To ensure the sustainable development of the oil field,strengthen the basic experimental research and increase the proportion of science and technology is necessary.In the past,the experimental conditions can not strictly simulate the reservoir formation conditions,so the experimental results can not accurately reflect the law of oil and water migration,So this paper on the NH oil field oil and water infiltration experimental study is important.The influencing factors of oil and water infiltration are temperature,viscosity,pressure,wettability and pore structure.The mechanism of oil-water relative permeability is extremely complex,and there is no conclusion at home and abroad.In order to understand the oil-water infiltration of NH reservoirs,the experimental part is divided into natural core High temperature infiltration experiments and natural core flooding efficiency experiments,the experimental results of high temperature infiltration experiments were treated with JBN method to obtain a relatively accurate seepage curve to study the oil and water migration laws of reservoirs.The results show that the results of the study can be used to study the ultimate recovery of the oilfield and the displacement ratio and the temperature of the oil in the oilfield.Through the study of the results,the level of reservoir research and the final recovery will be improved.