This paper reports the laboratory study to check the influence of water content, amount, distribution, and water types, on shale reactivity. Even though it is known that any change in water content affects shale behavior, quantification had not previously been attempted. A new method using thermogravimetry (TGA) is developed to determine the water content and provided the opportunity to quantify water loss severity due to dehydration. For a complete understanding of shale-fluid interaction, a more detailed characterization methodology was necessary. The most popular method used by the industry, X-Ray diffraction (XRD), has limitations with shale samples. The proposed methodology uses TGA and is presented here. It has several advantages when compared to XRD. The composition of the rock can easily be identified and structural changes of the rock can be observed.

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