Experimental Investigation into the Effects of Fracturing Fluid-Shale Interaction on Pore Structure and Wettability

Table 3

Contact angle after slick water soaking for different times.

Sample	No. 1	No. 2	No. 3	No. 4
Y0	22.2°	19.3°	25°	21.4°
Y1	14.3°	15.7°	11.5°	7.9°
Y2	7.3°	4.9°	4.9°	2.4°
Y4	20.4°	24.5°	35.4°	32.4°
Y8	42.3°	38.4°	45.6°	51.5°