0000912057-01-003834 15-12G 1 20010201 BASIN EXPLORATION INC 0000827795 1311 841143307 DE 1231 15-12G 34 000-20125 1521711 370 SEVENTEENTH ST STE 1800 DENVER CO 80202 3036858000 370 SEVENTEENTH STREET SUITE 1800 DENVER CO 80202 15-12G 1 a2036840z15-12g.txt FORM 15-12G