Study on the Wettability and Spontaneous Imbibition Characteristics of Lacustrine Shale

Table 3

Average values of “gas-water-rock” contact angle for different petrographic.

Lithofacies type	Sample number	“Gas-water-rock” contact angle
Sandy interlayer	YY-72-2	8.10
Low organic matter laminated siliceous shale	YG-616-3	23.58
Low organic matter laminated siliceous shale	YJ-62-3	28.40
High organic matter laminated siliceous shale	YA-151-1	41.30
High organic matter massive siliceous shale	YD-22-1	40.68
High organic matter massive clay shale	YJ-27-1	47.69