Data for: Mechanical properties of basalt, tufa and breccia in Permian System of Sichuan Basin after water absorption-implications for wellbore stability analysis

The data contains the results of water absorption test and triaxial compression tests of basalt, tufa and breccia, and the results of the collapse mud weights calculated by the compression tests for the Permian volcanic reservoir in Sichuan Basin. The samples of basalt, breccia and tuff were taken from outcrops in Hongya County, Meishan City, Sichuan Province.