intervals of interest
    wellid_col : str, default=&#34;API_NUMBER&#34;
        Name of column in df containing a unique identifier for each well, by default &#39;API_NUMBER&#39;. .unique() will be run on this column to get the unique values.
    log : bool, default = False
        Whether to log results to log file

    Returns
    -------
    wellsDF
        DataFrame containing only the unique well IDs
    &#34;&#34;&#34;
    logger_function(log, locals(), inspect.currentframe().f_code.co_name)
    if v