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 3 Optimization results of composite dosage of GZD and lignin fiber.

Dosage/% Maximum pressure/ MPa Leakage/ mL Cumulative leakage/ mL Critical pressure/ MPa 4% A+2% B+2% X 3 10.0 193 3.5 4% A+2% B+2% X+ 0.5% lignin fiber 4 2.0 92 4.5 4% A+2% B+2% X+ 1.0% lignin fiber 4 1.8 89 4.5