Drilling fluids comprising graphenes and nanoplatelet additives and methods for production thereof are disclosed. Graphene includes graphite oxide, graphene oxide, chemically-converted graphene, and functionalized chemically-converted graphene. Derivatized graphenes and methods for production thereof are disclosed. The derivatized graphenes are prepared from a chemically-converted graphene through derivatization with a plurality of functional groups. Derivatization can be accomplished, for example, by reaction of a chemically-converted graphene with a diazonium species. Methods for preparation of graphite oxide are also disclosed.
STATEMENT REGARDING FEDERALLY SPONSORED RESEARCH
 The work in this application was supported by NASA award NNX07AI65G, Federal Aviation Administration Award 2007G010, the Air Force Office of Sponsored Research/Air Force Research Lab, and the Advanced Energy Consortium.