Cause Analysis and Preventive Measures for Sand Production in Gas Wells of Sulige Gas Field

Sand production from gas wells has a significant impacton theproduction of gas wells. This review aims to reveal the reasons forfracturing sand backflow in Sulige Gas Field gas wells and providetargeted preventive measures to prevent fracturing sand backflow.The critical parameters of sand production in gas wells were calculatedthrough theoretical models, and the reasons and mechanisms of fracturingsand backflow in Sulige gas wells were analyzed from three major aspects:production factors, reservoir factors, and process factors. The AnalyticHierarchy Process was used to analyze the degree of influence of thesand production factors in gas wells. Research has shown that thehigh production rate of gas wells, unreasonable design of fracturingparameters, and insufficient drainage of fracturing fluid are themain reasons for sand discharge in the Sulige gas well formation.Controlling the production of gas wells between the critical flowrate of fracturing proppant reflux and the critical sand carryingflow rate of the wellbore, designing fracturing construction parametersreasonably, prolonging the gas testing time, and allowing the fracturingfluid to fully reverse flow can effectively prevent sand productionfrom the gas well.