Synthesis of a Novel Filtrate Reducer and Its Application in Water-Based Drilling Fluid for Ultra-High-Temperature Reservoirs

Table 3

Experimental results of antisalting out of PMHA.

Concentration of Cl^- (g/L)	0	90	108	126	144	162
Solution transmission ratio of PMHA	98.8	98.6	98.3	97.9	95.1	94.3
Solution transmission ratio of DCL-a	99.0	98.9	98.7	98.5	98.3	98.0
Solution transmission ratio of HTRTP	98.3	98.2	98.1	98.0	97.7	97.4