Geosteering Drilling Well Track Prediction Technology And Application

In daqing oil field since the Eightys,since the research of asp flooding has been completed four major reservoir alkali asp flooding pilot test,as the displacement of asp flooding technology in the development of the second type reservoir,the displacement of an object is lower,the difference of interlayer permeability is bigger,because there is a layer between the contradictions,and the reservoir interval more complex problems,such as by injecting ability test and optimization of asp flooding slug and chromatographic separation for experiment decide.Based on two types of reservoir in daqing oilfield,by conducting polymer molecular weight,concentration and core permeability matching relationship between indoor experimental research,calculation of the ternary system parameters such as drag coefficient and residual resistance coefficient.Through physical simulation experiment of asp flooding,Lord vice slug size and concentration of various chemicals in the slug optimization,in order to determine the best Lord,vice slug size and slug concentration.Through long enough natural rock cores should be used in as far as possible close to the reservoir under the condition of physical simulation displacement experiment observed phenomenon of chromatography,to determine the ternary component without inferior parameters such as polyethylene.Results show that the highest degree of viscosity degradation affects the ternary system of injection pressure,permeability phase at the same time,the greater the degree of degradation,the lower the maximum injection pressure;Permeability affects the maximum injection pressure of the ternary system,on the viscosity of ternary system degradation degree phase at the same time,the lower the permeability,the higher the injection pressure;Under the condition of such as adhesion,low molecular weight polymer injection amount is more,and in the core are less able to reduce water phase permeability,and high polymer molecular weight can cause core plugging,considering the specific situation of the second type reservoir permeability,the proposal USES 16 million molecular weight polymer ternary system for injection,the shear viscosity top 50 mpas.ternary compound system;Applied with the actual reservoir poroperm characteristics of the preparation of the corresponding core with slug size and concentration of optimum oil displacement experiments,the optimum injection slug main slug concentration for [1.2wt%Na2CO3+0.3wt% surfactant +2200mg/L polymer]0.35 PV,deputy slug concentration for [1.0wt% Na2CO3+0.1wt% surfactant+2200mg/L polymer] 0.15 PV.Through natural casting core ternary system dynamic retention experiment,determine the alkali hold up to 0.31 mg/g,surfactant hold up to 0.1 mg/g,hold up to 0.051 mg/g of polymer and alkali hold up the biggest,combined with the measured results obtained the ternary system components without inferior together,it is concluded that weak base ternary compound system in injection with chromatographic separation phenomenon;The when flowing through the model of asp system,polymer and alkali and surfactant had happened between chromatographic separation,polymer breakthrough first,alkali and surfactant together then.The second class reservoir pore structure of the complex could increase the extent of the chromatographic separation.