Nanoindentation can measure the mechanical properties of samples with very small size. In this study, nanoindentation tests were performed on core samples from Middle Bakken Formation. Bedding directions were marked, and nanoindentation tests measured properties of samples parallel and perpendicular to bedding. The measurement results were summarized and compared for the perpendicular indentation and parallel indentation on samples. In addition, mineral composition analysis and scanning electron microscope (SEM) with energy-dispersive X-ray spectroscopy (EDS) analysis were performed to characterize the microfabric of the samples, and the morphology, size and distribution of the pores for Bakken samples. This work is especially useful for the optimization of the drilling activities, as well as the hydraulic fracturing operations in Bakken.

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