Research On The Law Of Gas-Liquid In The Well In Operation While Kicking

The amount of blowout in operation is one part of the total. The bottompressureafterkickingand breakingcapacityoftheblowout willbeknownbystudying the flow law in the well bore in operation and it is directory todisposal thedensityofthekill fluidandtomakepreventivemeasure. Inviewof operation trait, the temperature equation of the fluid in the well bore wasderived, and it is non-line between the fluid temperature and the depth. Thetemperature of the fluid in the bore is lower than the temperature offormation corresponding to the depth at the beginning of the kick while theformer is higher than the latter when the kick is developed. The calculationexpressions of the bottom pressure to different operational mode werefounded indicating that the tripping out is the easiest step to kick; the wellkick model was built and the software to optimize the operational parameterandtosimulatekickprocesswaswrote,itdemonstratesthatthefluidvelocityincreases sharplyand steadies at the latter part of the kick while it is small atthebeginningandthebeginnerofthewellkickisthecriticaltimeofcapping.The affecting factor was analyzed by changing the different computationalcondition and it is made known that the development time of blowout, thepeak velocity at the wellhead (breaking capacity) and the bottom pressure developed are not only in connection with the operational mode but alsorelatedtotheformationpermeabilityandgasfluidratioaswellasoperationalparameter of operation. The formation must be distinguished and theoperational parameter must be appropriate to prevent the blowout. The causeand precaution of the blowout in the operation is summarized by parsingseveraltimesofblowout.