Tubing String Mechanics Analysis Diagnosis And Optimization Design For Oil And Gas Well

With the deepening of oil and natural gas exploration and development,Oil and gas exploration is becoming more and more difficult and have an obvious decreasing trend,We need to take various measures(water,stimulation,augmented injection)to transform the reservoir in order to further improve the recovery of oil and gas production to transform the reservoir for achieving high and stable yield purposes.This article mainly take injection string as research object,through the establishment of three dimensional hole trajectory model,the temperature stress field model,the three-dimensional mechanical coupling model,the string checking model,etc.,The article analyzes the force of the injection string in different working conditions,calculate string length under different conditions of deformation,the tubing string in construction process,this article also combined with the well track down into the feasibility analysis of the string to ensure a safe rule to production operation.The article develop oil and gas wells string mechanics analysis software by using delphi7.0.Through the application on the spot,the maximum error between calculation results and oil field data is only 10% by testing three wells In the process of operation,so it can guide oil field operation.