Hong PAN, Fa CHENG, Yu-ping WEI. Study of Natural Polymer for Water Blockage and Profile Modification[J]. Polymer Bulletin, 2005,18(6):118-121,132. DOI: 10.14028/j.cnki.1003-3726.2005.06.020.
guar-gum and so on used as water control agent in oilfield were reviewed.And the tendency for natural polymer as water shutoff agent was also elaborated.