from 1971 to 1973 Uranium exploration, as a geologist of a PNUD project, Burkina Faso (Upper Volta).

From 1973 to 1983, mineral exploration, laboratory studies, synthesis, and field exploration (drilling and large field synthesis).

The main topics are related to tin-tungsten (Europe and Australia), and porphyry copper mineralization type (Europe, South Africa, and Papua New Guinea)

1983 to 2005 Petroleum exploration with Elf, and later on (1999) with Total, as inorganic geochemist, mainly laboratory studies on exploration projects with participation to numerous research projects.

Head of the inorganic digenetic section from1990 to 1998, main activities related to exploration problems and international research project as leader (Norway, UK, and France).

From 1998, diagenetic synthesis activities, with a strong participation into exploration

List of research topics of interest:

 . Reservoir diagenesis ((bloc 25 Norway 1992 -1994), FROY field (1995 – 1997).

 . Modeling inorganic processes (1994 – 1996),

 . High pressure and high temperature diagenetic processes (1996 – 2000),

 . “reservoir waters, development of a new process” (2000 – 2001)

 . Acid gas sequestration (since 2002)

 . Natural tracers (since 2004)