0001047469-98-012835 DEF 14A 1 19980505 19980331 NASD BASIN EXPLORATION INC 0000827795 1311 841143307 DE 1231 DEF 14A 34 000-20125 98581547 370 SEVENTEENTH ST STE 1800 DENVER CO 80202 3036858000 370 SEVENTEENTH STREET SUITE 1800 DENVER CO 80202 DEF 14A 1 000104746998012835-001-seq1-def-14a.txt NOTICE AND PROXY STATEMENT