The Research of Second Acid Fracturing Temporary Plugging Agent in Long Interval Gas Well of Puguang
On the basis of physical truth of long Interval gas well in Puguang, it proposes a technology for adding temporary plugging agent in the second acid fracturing fluid. The CKHG-1 system and polyester fibre solid intensifier have been synthetized and taken infrared spectroscopic analysis. A series of experiments have been done such as density, molecular weight, differential scanning calorimetry, scanning electron microscopy, acid soluble rate and core flowing experiment. The results were obtained through tests, including temporary plugging agent density of 1.2297 g/ml, average molecular weight of 1.27×105, glass-transition temperature of 61°C, temporary plugging particles covering fixed effect was ideal, acid soluble rate after four hours of 95%, temporary plugging rate >99%. They can meet actual conditions in worksite.