Study on the Gas Channeling Prevention Ability of Different Cementing Slurry Systems
[Purposes]This paper aims to clarify the anti-gas channeling performance of several com-monly used cement slurry systems,establish scientific evaluation methods,and guide the adjustment of cement slurry system formulations on construction sites.[Methods]On the basis of studying the mecha-nism of gas channeling in cementing cement slurry,the author used a self-made evaluation equipment for gas channeling prevention of cement slurry,established an evaluation method for the gas channeling prevention ability of cement slurry,and tested and clarified the gas channeling prevention performance of different cement slurry systems.[Findings]The results show that high water-cement ratio is not condu-cive to channeling prevention of cement slurry,but channeling prevention materials can significantly im-prove the channeling prevention ability of cement slurry.[Conclusions]The research concludes that the anti channeling effect of cement slurry in the later stage should be focused on simulating the gas channel-ing effect of cement slurry under high pressure and studying elastic particle materials.
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