Examples of discriminating the downward depth and downward timing of the velocity string in the water-producing gas well

The problem of bottom hole effusion is an important reason for the reduction and even shutdown natural gas wells. Downward velocity string drainage recovery process, which can improve flow rate discharge more liquid from wellhead. However, depth timing a technical that has been difficult to solve by field engineers. To this problem, paper designs method select in case highly deviated wells applies Well X6–2 X2–1 PCOC Ordos Basin, China. optimization results show when wellhead pressure 6.26 MPa, should lower 2–1.71 in. or 2.375–1.995 3337.9 m before formation decays 8.800 most conducive carrying capacity When 4 2–1.71in. 3401.3 5.800 5.900 MPa.