Low Damage Modified Vegetable Gum Fracturing Fluid System

Low damage fracturing fluid system is applied more and more widely in Sulige gas field.A kind of low damage fracturing fluid system is developed based on novel cross-linking agent forming deltohedron structure,and thickening agent of modified vegetable gum that has some characteristics of modified by hydrophobic groups,cation guar gum,molecular weight of 100,000 to 200,000,good water dispersion ability,content of water insoluble matter not more than 3%,viscosifying fast with concentration of 0.2% to 0.3%,and low content of breaking-gel residue.The application in well Su76-X show that,after fracturing,this well is of the first class in gas production testcategory,and it is of the second class in lithologycategory,which has good fracturing effect.