>..O.K but what about higher temperatures in tight gas formations,would it still work and what about the costs of the polymeres ???

According to this article, this polymer method isn't being actively pursued.

http://www.rpsea.org/attachments/wysiwyg/4/produced_sydansk.pdf

A Leading Cause of Tight-Gas-Sand Well Abandonment

-Is water production

-Can be relatively small amount or rate

-Causes well to become uneconomic

-Leads to premature abandonment of gas reserves surronding the well

-Leads to large volumes of stranded recoverable gas reserves

-Much of water production to these wells occurs via fractures

-Development of effective water-production-abatement technology for tight-gas-sand wells could add huge amounts of U.S. gas reserves from proven & exising tight-gas-sand reservoirs

-The possibility is not being actively pursued