I propose to use a combination of experimental and molecular simulation-based approaches to understand wettability of kerogen. First, the impact of composition and thermal maturity of kerogen on wettability of organic-rich mudrock will be studied using experimental and molecular simulation methods. The impact of reservoir temperature and pressure conditions on kerogwn wettability would be quantified using molecular dynamics simulations. The methods proposed in the thesis will help in improving the understanding of wettability of organic-rich mudrocks. The sensitivity of wettability of kerogen on the electrical resistivity measurements of organic-rich mudrock will be quantified using a combination of experimental methods and numerical simulation. This study could also provide insight into water production issues in shale and will potentially improve formation evaluation and the understanding of fluid flow mechanisms in organic-rich mudrocks.