| As the most effective measure to increase production in the low permeability reservoir, the more attention has been received by the domestic and foreign. At present, the research on the domestic and foreign researchers have developed the fracturing fluid system suitable for different kinds of oil and gas reservoirs. It can be applied to the different conditions of oil gas reservoir and meet the requirements of different oil and gas reservoirs. In the fracturing process and fracturing fluid to the vital role, the main use of fracturing fluid is in construction operations provide fluid with corresponding properties and by ground high pressure pump into the production near the bottom of the formation is pressed open cracks, along the crack open the pressure after the transfer of proppant. After fracturing, the fracturing fluid can quickly gel breaking, with low viscosity fluid, and then return to the ground, gel breaking capacity of fracturing fluid is the pressure in the construction of reservoir damage reduced a lot. The performance of fracturing fluid is directly related to the effect of fracturing construction, good fracturing fluid can form a set size and diversion ability of the crack, but it will affect the entire oil field fracturing.Through the comprehensive analysis of conventional fracturing fluid properties and fracturing fluid system of formation damage in this paper, the system developed out of a acid and low damage fracturing fluid, namely to modified guar gum as a thickening of the agent and organic zirconium crosslinking agent as the main component of the fracturing fluid system and through the indoor experiment of the acid of low damage fracturing fluid additives were screening and optimization, comprehensive evaluation of the basic performance of acid fracturing fluid with low damage. From the above experiment, the damage to the formation damage of low acid fracturing fluid is far lower than that of conventional fracturing fluid. |
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