Any alphanumeric character string. (40 characters maximum). Enclose the
string in single quotes. Either the well sequence number or the well name must
be specified. If only the well name is specified without the well sequence
number, then an internal well sequence number is assigned to the well
automatically by the program. This sequence number is simply the number of
*WELL keywords in the data set up to and including the current *WELL
keyword. Both sequence number and name may be entered by the user.