allows the user to define a set of wells with differing membership
weights which has data reported just as for the hierarchical groups which are the basis for group
control (see the manual entry for *GROUP, *GCONP, and related keywords). No group
controls can be specified for reporting groups, but there are no restrictions upon well
membership in reporting groups. A well may be a member of an arbitrary number of reporting
groups, and a well can have any non-negative membership weight in a reporting group.