The Evaluation System And Potential Of Zonal Injection In Suijing Oilfeild

In recent years, through research on zonal injection system and the key supporting toolsdevelopment, the zonal injection technology in Changqing Oilfield achieve a "quality" and"quantity" leap, the progress lies in three areas: First, the number of injection wells increasedsharply, adding300wells per year, with an increase from597wells in2008to1938in2013;Second, through technology optimization, it formed a directional bridge eccentric zonalinjection technology, then came to large-scale application, providing technical means forpunctual water injection in oilfield; Third, in recent years, with the implementation of zonalinjection technology, xinghe,hua152, NanxiLiang, Bai209, Huaqing and other blocks, waterflooding reserves and formation pressure rise well.This thesis studys zonal injection of technical requirements at home and abroad andevaluation methods on zonal injection in Changqing Oilfield,combining with reservoircharacteristics, appease the effect of zonal injection from water flooding and decreasing,thenset up evaluation system suited for Suijing Oilfeild.we begin with small formation division,sedimentary facies and reservoir heterogeneity, etc,then research the potential of zonalinjection,Then optimize method which suited water injection rate and put up zonal injectionplan for next step,at we implement zonal injection. through the implementation of zonalinjection technology make rate of zonal injection increased to25.0%. The study can enrich andimprove the understanding of low permeability reservoir with important theoreticalsignificance, which has great significance to the sustainable development of oil field.