Shell oil fields in Nigeria and oil pollution. Ogoni demonstration against Shell in the Bori Region. Demo in Bori region. Ken Saro Wiwa. Ken Saro-Wiwa, local leader, speaking at Ogoni Day demonstration, Nigeria. The demonstration was officially called to mark the start of UNICEF's International Year of Indigenous People, but unofficially it was against the Shell oil company. Shell operates many oilfields in the Bori region and there have been many blowouts and leaks.