Preparation and performance evaluation of high temperature resistant composite gel plugging agent
In view of the poor temperature resistance of conventional gel plugging agent and the insufficient strength of gel,a new high temperature resistant gel plugging agent is developed by taking high temperature resistant polymer as gelling agent,adding appropriate gel reinforcing agent and fiber toughening agent to form high temperature resistant gel base fluid,and then reacting with composite organic cross-linking agent.The research shows that the gel plugging agent has good shear dilution characteristics.Under shear stress conditions ranging from 0.1 to 100 Pa,its storage modulus is several times higher than the dissipation modulus,exhibiting good viscoelastic properties.At the same time,the temperature resistance can reach 140 ℃,the pressure bearing capacity of permeability simulation plugging can reach 7 MPa,and the pressure bearing capacity of fracture simulation plugging can reach 4.0 MPa.
gel plugging agentgel strengthhigh temperature resistancepressure sealinglost circulation
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NSTL
万方数据
维普
