Based on the data investigation,a composite toughening material was formed by ternary compounding of polymer,elastic particles,and whisker toughening materials.At the same dosage,the composite toughening material has a better elastic modulus reduction effect than a single toughening material and plays a positive hybrid effect.The elastic modulus of ductile cement stone after adding the composite toughening material can be reduced by 26%to 30%compared with that of the clean slurry and has no adverse effect on the construction performance of the cement slurry such as the thickening time,water loss,stability,etc.The material has been applied in shale gas wells in Sichuan and Chongqing,with smooth cementing construction and excellent cementing quality,which lays a favorable foundation for the popularization and application of the composite toughening material in shale oil and gas wells and gas storage reservoirs.
NETL
NSTL
万方数据
