A New Experimental Approach for Hydraulic Fracturing Fluid Damage of Ultradeep Tight Gas Formation

Table 2

Formation water salinity test results (Tarim tight gas formation).

Test no.		1	2	3	4	Average
Cl^−	mg/L	145000	146000	149000	146000	146500
SO4^2−	mg/L	483	508	536	485	503
Ca^2+	mg/L	13720	14200	13950	13370	13810
Mg^2+	mg/L	814	752	742	897	801
K^+	mg/L	6734	7093	7459	4757	6511
Na^+	mg/L	78130	78180	77620	77640	77893
Total salinity	mg/L	245900	247800	250500	243900	247025