Research on Gas Production String Optimization in Weirong Deep Shale Gas Field
In the face of the characteristics of high liquid production and long production time in the deep shale gas field of Weirong Gas Field,as well as the gradual decline in casing carrying capacity during production,research on production string optimization is being carried out.To clarify the optimization parameters of the Weirong gas field string,a critical gas flow chart for liquid carrying was established to analyze the production characteristics of differ-ent gas wells.By combining the critical gas carrying capacity calculation method and node system analysis method,the production string is optimized,and the minimum pressure difference method throughout the wellbore is used to optimize the position of oil pipe insertion.Research has shown that in the actual situation of difficulty in carrying liquid in the casing of deep shale gas wells in the gas field,it is possible to insert Φ 73.0 mm oil pipe to achieve stable production.For upturned gas wells,it is recommended to run the tubing at target A;For downward inclined gas wells,it is recommended to run the tubing in an area within 20 meters of the vertical depth from target B.This recommended solution has achieved good on-site application results in 20 wells,improving the stable production and self spraying period of gas wells by more than 3 months.
deep shale gasliquid carrying critical gas volumeoptimization timing of pipe columnsoptimization timing of pipe columns
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