Optimization Of Technological Parameters Of Layered Steam Injection In Heavy Oil Reservoirs

At this stage,many heavy oil reservoirs are greatly affected by reservoir heterogeneity,and there is still a large difference in the degree of utilization of the reservoirs.Therefore,a large amount of remaining oil is still buried in the strata.Take Well Oilfield of Well Block as an example.With the increase of the throughputs,the throughput effect will be worsened.Based on the above practical problems of oilfield production,using the three-dimensional physical simulation experiment,steam overruns and their influences on steam injection in different prosodic reservoirs are successively carried out,and the longitudinal suction conditions and the spread of steam injection in layered steam injection are studied.Nitrogen or foam-When longitudinal suction situation and the spread of research,the general steam injection,layered steam injection,enhanced layered steam injection experimental results of the numerical expansion of the study.To study the production status of steam injection layered steam injection with different types of reservoirs and different geologic parameters,and to form a screening chart and empirical formula.Based on this experiment,numerical simulation is carried out to verify the results of physical simulation and to establish a three-level and six-factor orthogonal design table(L18(3~6)).The evaluation indexes include the steam injection amount,steam dryness,The three parameters of steam injection speed are optimized for layered injection and injection parameters:steam dryness,steam injection temperature,daily discharge,periodic steam injection,periodic increase ratio and nitrogen injection,which provide strong technical support for actual production on site.