Interpretation And Application Of Casing Monitoring Technology In Dongpu Sag

Dongpu sag region since 1979,oil and water Wells well conditions worse year by year,so far the accident Wells have accounted for 22.6% of the total number of Wells,the casing damage Wells of body.Especially these years all kinds of measures to gradually increase,oil and water Wells casing damage rate has been on the rise.Only 1998 to 2002,the oil water well casing damage increase 108,damage rate of 34.0%,even in loss reserves reached 379.08 ×104 t,the amount of light injection Wells casing damage Wells have 355,accounting for 46.3% of the oil field water injection well,the casing damage rate trend in growth,unbalanced injection-production system,increase the oil and water Wells is restricted,oil region severely affected the overall development level and economic benefits.So to solve this problem,find out the cause of the deterioration of well conditions and formulate relevant preventive measures.According to the geological characteristics of the area of dongpu sag and the current situation of the development and application of multiple arm caliper logging tool and electromagnetic defect detection logging tool to monitor the oil and water Wells casing damage.Prescient to comprehensive testing,the measurement of special ground and underground,grasp and understanding the various factors affecting the oil and water Wells casing damage,the relationship between the early to take prevention measures,reduce the casing damage.More arm caliper logging can measure the inner diameter of the tube wall according to the contact that casing damage,electromagnetic defect detection logging by electromagnetic induction law,provide the oil remaining wall thickness,oil casing pipe corrosion,deformation,fracture,fault fault information,such as for downhole string "census" technology status of oil and water Wells become possible.The comprehensive interpretation of the two methods combination logging data,can be intuitive show the status of the casing damage,deformation,scaling,and assess the interior and exterior corrosion problems of pipe string,can greatly improve the accuracy of judgment of casing damage situation,improve work efficiency,in does not affect the production under the condition of rapid evaluation of string,Wells and gas Wells in the process of production tubing string technology conditions.This article simply sag region east of the measured well as an example,through the analysis of the instrument of casing monitoring techniques introduced structure,logging principle and practical application of research,improve the construction technology,to improve and perfect the existing casing monitoring technology,the more the arm caliper and electromagnetic detection combination logging two kinds of methods based on the analysis of application effect.Comprehensive application and contrast many arm caliper curves and magnetic testing curve data,for the casing damage Wells well condition monitoring provides accurate comprehensive data.Help to understand the status of the downhole string technology oil and water Wells,the well conditions of scientific prevention measures and speed up the repair of casing damage Wells,which guarantees the normal production of oil field.