Lost circulation material for abnormally high temperature and pressure fractured-vuggy carbonate reservoirs in Tazhong block, Tarim Basin, NW China

Xiaoming SU,Zhanghua LIAN,Junwei Fang,Hanqiao XIONG,Ruoning WU,Yuan YUAN

Table 4 Optimization results of composite dosage of GZD, lignin fiber and SQD-98.

Dosage/% Maximum pressure/MPa Leakage/ mL Cumulative leakage/mL Critical pressure/MPa 1#+1% SQD-98 (large) 4.0 12 134 4.5 1#+2% SQD-98 (large) 4.0 9 123 4.5 1#+3% SQD-98 (large) 4.5 7 125 5.0 2#+1% SQD-98 (middle) 5.5 13 153 6.0 2#+2% SQD-98 (middle) 6.5 10 123 7.0 2#+3% SQD-98 (middle) 7.0 2 114 7.5