Development and application of epoxy plant residual oil as casting leakage treatment agent
Casting leakage treatment agent(CLTA)was prepared from epoxy plant residual oil and methylhexahydrophthalic anhydride and characterized by FTIR,SEM and metalloscope.The thermal stability,rheological and mechanical properties of CLTA were further analyzed,followed by exploration on its permeability,plugging ability,solidification mechanism and degradation mechanism.The results showed that CLTA displayed good injection performance and controllable curing time.The CLTA showed an applicable temperature up to 258℃,indicating that CLTA could be used for plugging in reservoirs<258℃.In a simulated environment with a temperature of 100℃and a salinity of 8×104 mg/L,the CLTA exhibited a compressive strength of 41.93 MPa and a quality retention rate of 93.1%after 90 d of aging,which demonstrated that the CLTA obtained had excellent long-term stability and could meet the demand of long-term reservoir water plugging.Meanwhile,the compressive strength and elastic modulus of CLTA solidified product were 44.77 MPa and 1.62 GPa,respectively,about 1.77 times and 12.5%of those of G-grade cement.The failure deformation of CLTA was 7.63%,while that of G-grade cement was only 0.53%,proving that CLTA was superior to G-grade cement in strength and elastic-plasticity.In addition,CLTA showed a bonding strength of 5.09 MPa,and could be completely degraded by the depressant within 270 h at 80～140℃.
plant residual oilrecycling of wastesdegradabilityhigh strengthcasing leakage treatment agentoil field chemicals
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