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《Fault-Block Oil & Gas Field》 2010-02
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Progress in research and application of starch graft copolymer used for oilfield

Wang Zhonghua(Research Institute of Drilling Engineering and Technology,Zhongyuan Petroleum Exploration Bureau,SINOPEC,Puyang 457001,China)  
With starch as raw materials,by the graft copolymerization with monomers,such as acrylamide,acrylic acid,acrylonitrile,2-acrylamido-2-methylpropanesulfonic acid,3-methylacrylamido propyl trimethyl ammonium chloride,dimethyl diallyl ammonium chloride,the oilfield chemicals can be got for different purposes.This paper mainly introduces the research and application of starch graft copolymer used for oilfield.The research and application results show that the starch graft copolymer used as a drilling fluid additives has strong filtration reducing capacity and good salt-resistance and anti-temperature capabilities in fresh water,salt water,saturated brine and composite brine drilling fluid.As the profile control agent and water shutoff agent,the starch graft copolymer can be crosslinked with a number of crosslinking agents to form a high viscoelastic gel system.And the flexible side chains and the rigid framework penetrate with interpenetration,which forms the polymer with star-shaped or comb-type structures.The crosslinked system has strong anti-temperature,salt-resistant,anti-shear properties and long-term stability.Used as the flocculation and purifying agent of oilfield water treatment,the starch graft copolymer is with the features of abundant source and low price,and is biodegradable.That has strong flocculation and the coagulation bleaching effect is good,which has broad application prospects in oilfield.
【CateGory Index】: TE39
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