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 5 Optimization results of composite dosage of GZD, lignin fiber, SQD-98 and CaCO3.

Dosage /% Maximum pressure/MPa Leakage/ mL Cumulative leakage/mL Critical pressure/MPa 3#+1%CaCO3 7 10 98 7.5 3#+2%CaCO3 7 6 88 7.5