Geochemical and mechanical characterization of organic matter in shale

A photomicrometer was utilized to identify organic type and to determine vitrinite reflectance. Reduced modulus of organic matter was measured by nanoindentation. IR (D/G) means the intensity ratio of D peak to G peak of Raman spectrum. A total of 114 test areas in four shale samples from Bonan Sub-sug in Bohai Bay Basin, China were selected for testing