Failure Analysis And Evaluation Of Layered Water Injection

With the deepening of oilfield development and the decrease of oil recovery,the layered water injection technology has become an effective way to increase and increase the production of large oil fields.The layered water injection can meet the energy demand of different reservoirs accurately.In the actual dispensing development,there is a serious problem that the tool wear is serious,the effective life of the column is short,the overinjection or under-injection,which greatly affects the water injection efficiency and the operation validity period.In order to improve the efficiency of oil recovery and layered water injection,it is of great significance to explore the effect of layered water injection pipe column.In this paper,the mechanical analysis of the layered water injection column is discussed,and the mechanical model of the water injection column is established.The parameters such as axial force,stress contact force,deformation,friction and bending moment are discussed.The calculation method of fluid flow and pressure of layered water injection is studied.The failure of the water injection column is divided into four types: stratigraphic parameter change,pipe failure,water separator failure and packer failure.The fault causes,performance and influence of the layered water injection column are summarized,and the failure and failure Of the components for analysis.And finally determine the three factors that have the greatest impact on the life of the layered water injection column: the condition diagnosis,the life of the packer barrel and the life of the column.Aiming at the diagnosis of working condition and improving the existing working condition diagnosis method,a set of qualitative and quantitative method of fault diagnosis is formed.The layered water injection curve is fitted according to the measured data of water injection and the eigenvalue is calculated for quantitative calculation.The life of the packer and the water injection pipe shall be tested for the life span in order to facilitate the selection in different well conditions.The establishment of a relatively complete extension of the life of the layered water injection of the validity of the countermeasures.According to the idea of layered water injection,the software module of layered water injection condition diagnosis system is compiled by C # language.The module can be based on the parameters measured before and after the diagnostic conditions for the diagnosis of output conditions and mechanical analysis of the fault conditions.For the field construction workers to provide fast and accurate conditions of diagnosis,treatment measures and extend the validity of life recommendations.