Layered Water Injection Technology Research Of Xinmu Oilfield

Water flood development is an important means to achieve long-term high and stable yield of oilfield.In order to solve the contradiction between the reservoir layer,to achieve a reasonable injection,rational mining,it must be stratified injection,in order to achieve the purpose of improving the ultimate recovery.Development after decades of water injection,many wells in Xinmu oil field due to changes of the crustal stress,corrosion and other factors,result in casing damage or severe deformation.Production process causing the pollution of the reservoir near-wellbore region,the water injection network,wellbore sealing and formation with low permeability,to make the near-wellbore region to penetrate the lower year by year,there has been a lot less injection wells,which restricts the production of the old wells.Countermeasures for the problems faced by the oil field,should be studied.First,for Xinmu oilfield casing change wells,introduces their situation,analysis the casing deformation mechanism of wells,targeted proposes six different potential measures to be taken.Details the small diameter packer fracturing technology,does field trials,and gets corresponding results;Second,the owed injection for the wells in the oilfield.The paper analyzes owed injection reason of the injection wells.To different factors and distribution law of the owed injection,the paper respectively uses different augmented injection technology to governance,and obtain more practical comprehensive management technology to the owed injection wells.Third,to further enhance the Xinmu oil field water injection wells separate injection technology,improve the effects of oil field development,solve the problems of injection wells have an extremely low level of hierarchical regulation and Layers and flat contradiction highlights,for a single reservoir of two separate injection wells to the ground two separate injection process.And in-depth study of this process,making it the foundation of the blocks increase and stable measures,but also the most effective,long-term,most economic measures without harm;Finally,prepares the injection wells watershed map.The watershed map used to ensure the improvement of the water injection rate of qualified,effectively guarantee the quality of a stratified water injection,control of the production decline and cut rising speed,is simply passing through of oil field development to improve the effect.