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《Natural Gas Industry》 2008-01
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PROPERTY STUDIES AND APPLICATION OF LEAK PROTECTION AND FLEXIBILITY OF MEKRALON MUD

ZHANG Cheng-jin1,2,LENG Yong-hong1,LI Mei-ping1,LI Kai1,LIAO Xiao-chun1(1 Downhole Service Company of CNPC Sichuan Petroleum;2 Southwest Petroleum University)  
It is adopted to improve mud's leak protection that adding mekralon into mud in the leaking layer.It is shown in the experiment that 5-19 mm mekralon can enhance mud's shear force and improve its leak protection when the adding volume of mekralon is at 0.6% and bearing strength reaches 5.0 MPa in 30 min.The mekralon improves the deformability of mud,increases impact resistance by 32% and flexural strength by 30%,decreases elastic modelling quantity by 35%.The combination of mekralon and other additives can be applied in the field easily and solve the recycling leakage efficiently.Promising the comprehensive performance of original mud,it can also improve its performance in leaking prevention and flexibility and guarantee the cementing between cement casing and formation which is beneficial to cementing's quality.
【Fund】: 国家自然科学基金项目(编号:90210022)的资助
【CateGory Index】: TE256
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