Characterization of shale using T 2 – T 2 ∗ relaxation correlation measurements

Magnetic resonance 2D relaxation correlation measurements have been shown to be an incredibly effective way of characterizing complex porous media. Such porous media systems are important for various industries, including the energy industry. Organic shale is a prevalent example in the energy industry. In this paper, we demonstrate the characterization of a shale sample using our new T 2 - T 2 ∗ correlation measurement. We show that the measurement is capable of distinguishing between different hydrogen environments in shale, demonstrating analytical potential for composite porous media. We also show that T 2 ∗ cannot always be used as an analogue to T 2 in heterogeneous media, as shown by peak migrations away from contours of constant T 2 / T 2 ∗ , caused by changing the magnetic field strength.