STUDY AND APPLICATION OF HYDROXYPROPYL GUAR GUM FRACTURING FLUID

Hydroxypropyl guar gum is a kind of new type low-injury fracturing fluid.It is suitable for the oilfield that formation temperature is from 30 to 150℃.In applications of low-temperature formation(from 30 to 50℃),the fracturing fluid is broken by the oxidant and exciting agent.In applications of high-temperature(from 120 to 150℃),taking organic boron as cross-linking agent,it has advantages of higher viscosity,better prop-carrying capacity.Compared with organic titanium cross-linking agent,it has low-injury.Good econoinic and social benefits have been obtained in field applications of 237 wells.