The invention relates to the technical field of the fracturing of an
oil field, and particular relates to an acid carboxymethyl guargum
fracturing fluid and a preparation method of the fluid. The acid carboxymethyl guargum
fracturing fluid comprises the following raw materials: carboxymethyl guargum power,
discharge aiding agent, swelling-resistant agent, bactericide,
demulsifier, acid cross-linking agent, cross-linking time
delay action activator, gel breaker and water. The preparation method of the fluid comprises the following steps of: firstly preparing base liquid; secondly preparing cross-linking; and thirdly preparing the acid carboxymethyl guargum
fracturing fluid. The invention has the beneficial effects of acidic crosslinking environment, simple technology, convenience of in-field operation, and good combination property; and the acid carboxymethyl guargum fracturing fluid has the advantages of being good in compatibility performance, delayed in crosslinking characteristic, good in fluid loss characteristic, good in swelling-resistant effect, low in residue, and thorough in gel breaking, and can meet the fracturing construction of a reservoir stratum under the temperature from 30 DEG C to 100 DEG C.