Microbial mat-related silty dykes of the Precambrian:An example from the Paleoproterozoic Chuanlinggou Formation at Jixian section in Tianjin

Numerous sandstone dikes and sills (about 230) were dominantly found in the shales of the Puyu Formation, and formed a large swarm of sandstone dikes.

Identification of sedimentary microfacies of low-permeability siltstone reservoirs by expert system;

Accurately distinguishing siltstone and salt gypsum rock under combination drilling condition;

Experimental study on deformability and strength of soft siltstone;

Test study of chemical sand control for moderate shallow fine siltstone water well;