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《Geological Science and Technology Information》 2017-01
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Experimental Study on the Plugging of Acrylic Acid High Water Absorbing Resin in Deep Drilling

Niu Leixing;Sun Pinghe;Key Laboratory of Metallogenic Prediction of Nonferrous Metals and Geological Environment Monitoring of Ministry of Education,Central South University;School of Geosciences and Info-physics,Central South University;  
To meet the demand of deep drilling leakage and plugging,the acrylic high water absorbing resin with water absorption and expansion properties was used as the plugging material.First,the mechanism of the resin's expansion was analyzed.Secondly,the basic performance indicators were determined through the laboratory test,such as water absorption ratio,temperature resistance,salt and pH resistance,water retention,etc.Also the plugging performance of plugging material was determined by Plugging Material Tester.Lastly,glass fiber and silane coupling agent were used as composite plugging reinforcement materials to implement plugging experiments.Results show that the acrylic high water absorbing resin has high water absorption and excellent performance on temperature resistance and water retention.As the plugging material,this resin can plug the simulated fractures immediately under ordinary conditions.But its performance is not good enough due to the low gel strength after absorption.The bearing capacity is poor.A new method to use the composite plugging materials of resin and glass-fiber,which are processed by coupling agent,is put forward.The test shows that the plugging effect of the method is good.
【Fund】: 国家自然科学基金项目(41302124);; 湖南省自然科学基金项目(13JJ6002)
【CateGory Index】: P634.8
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