Liquid Loading of Horizontal Gas Wells in Changbei Gas Field

The Changbei gas field, which initially exhibited high gas-production performance, is dominated by large-displacement horizontal wells. With the decrease in reservoir pressure, liquid loading well currently severe, and production has been rapidly decreasing. Thus, recognizing gas-well to maintain stable necessary. A method was established identify water source of field. First, formation condensate were identified based on mineralization recovered mass concentration Cl? K+ + Na+, then content produced qualitatively evaluated. water–gas ratio curve for plotted determine whether edge-bottom water, pore or condensate. Then a distinguish start time using depicting production; also used estimate depth where occurs, according bottomhole pressure. available data, Arps decline model applied fit entire phase; resulting compared with actual well, two curves diverged when fluid accumulation began well. Finally, liquid-loading estimated This can be calculate wells unconnected oil jackets. analysis revealed that type primarily 35 wells, accounting 62.5% total number Edge-bottom 16 28.6% In remainder produced; calculations volume typical block some started accumulate after 45–50 months, amount could reach several tens meters, while others good condition. this paper enhance our understanding field lay foundation development deliquification techniques.