The Integrated Application Of New And Old Logging Technology In The Old Oilfield Water Flooding Method

Laojunmiao oilfield which is China's first industrial mining oil was discovered and put into production in 1930 s.But the systematic study is relatively weak,and the difference between new and old logging series is large.Conventional resistivity logging methods do not match in the application and evaluation of old wells.Nowadays the oilfield is in the late development period with high moisture content output and low phase,in order to provide identifiable ground for the two,three times of the old oilfield potential development,it is necessary to carry out the Laojunmiao oilfield flooded layer interpretation method research.Based on the experimental data of rock samples,researching reservoir characteristics of the study area,including lithology and petrophysical characteristics,formation water and crude oil properties.Sandstone lithology is mainly lithic feldspar sandstone and feldspar lithic sandstone,with low shale content;the reservoir property is better with high porosity and permeability;the total mineralization of formation water the degree is more concentrated;the viscosity of crude oil is high.Researching the properties,saturation distribution,wettability and variation of salinity of the water flooded layer in the process of flooding,then studying the longing curve characteristics of water flooded layer,including conventional logging and logging with new technology,which is the theoretical basis of logging evaluation of water flooded layers.For the new logging technology,based on the characteristics of the study area,selecting HDIL and nuclear magnetic resonance logging technology,calculating comprehensive evaluation index of fluid properties,analyzing of water flooded layer T2 spectrum and differential spectrum.Finally,establishing a calculation model of reservoir,predicting the porosity,permeability,saturation,water production rate and oil displacement efficiency.With the conventional logging data,the HDIL and nuclear magnetic resonance logging technology,based on oil displacement efficiency,water production rate and quantitative comprehensive evaluation index of the fluid properties of water flooded layer evaluation model has good application effect in Laojunmiao oilfield,which provides basis for an two or three times potential development of the old oilfield.