Error while using multiple quotes

Use a heredoc to run your commands over ssh:

ssh "$ip_address" << 'EOF'                 # shell will pass the heredoc as is to ssh because the end marker EOF is in quotes
    grep -i 20-10-2018 result.csv |        # I guess you meant to pass result.csv to grep, rather than awk
    awk -F "," '{ print $2",open_"$5 }' |  # good to put the parts of the pipeline on different lines for better readability
    while read line; do
      echo $Date":00:00",$line             # not sure what you mean by $Date here - probably $(date)?
    done
EOF

I am not sure what you mean by echo $Date":00:00". I left that part intact.

See this post to understand how to quote awk commands:

• Difference between single and double quotes in awk

Another useful post about using quotes in shell:

• When to wrap quotes around a shell variable?