Research And Application On Fracturing Technology With Acid Crosslinking Water Fracturing Fluid

In this paper, first, the characteristics of the reservoir of Chang2,Chang4+5and Chang6in Jing’an oilfield and Sui jing oilfield was described,and the low permeability reservoir of oil field damage factors and damage of existing regular fracturing fluid was evaluated, on these basis, the hydro-acidity-cleaning fracturing fluid was put in this paper. At the same time, development of the crosslinked hydro-acidity-cleaning fracturing fluid was completed, after a lot of experiments in the laboratory research, it is was designed and finished that the capacity of identity between acidification formula system and crosslinked hydro-acidity-cleaning fluid, clay barrier, reduse the water-locking damage and reverse wetting. So as filtration ability for fracture fluid broken breast performance meet the reservoir, and the resistant capacity of filtration core requirement caused by lower damage.The field application shows that to the success rate of once fracture was100%, in the construction process, after liquid viscosity of pressing stable pressure choke was less than5mPa. S, fracturing fluid gel breaking completely, return discharge rate above60%.On average, after the measures, the daily production of an oil well increase1.2t, and3561t cumulative, the effect is good. So the hydro-acidity-cleaning fracturing fluid can be used to different reservoir block because of the requirements of the transformation, and it was a good application value.