一种可固化防漏工作液水化机理研究

发布时间：2018-11-02 11:17

【摘要】：研究了一种低密度(1.30 g/cm~3)可固化防漏工作液,用于解决低压易漏失井段在固井时,因地层承压能力低、易漏失、窜槽,导致固井质量不高的问题。通过在优质的隔离液中加入一种具有固化性能的材料(2.60~2.90 g/cm~3)替代常规的加重剂,配制一种低密度可固化工作液。该工作液能有效平衡地层压力并在环空中固化,从而对易漏地层起到防漏效果、提高固井质量。重点分析了该体系的固化后试样强度及水化机理,研究发现:工作液固化强度发展的实质是OH~-对固化剂玻璃体结构的破坏;通过对配方的调节能实现从30~90℃固化试样都具备一定的抗压强度。该体系的研发对于防漏工作液的设计提供了一种新的思路,同时还可以运用于钻井工程中堵漏,提高地层的承压能力。
[Abstract]:A kind of low density (1. 30 g/cm~3) solidified working fluid is studied to solve the problem that the cementing quality is not high due to low pressure bearing ability, easy leakage and channeling in low pressure and easy leakage section. A low density curable working liquid was prepared by adding a kind of solidified material (2.60 ~ 2.90 g/cm~3) to the high quality isolating liquid instead of conventional aggravation. The working fluid can effectively balance formation pressure and solidify in the annulus, so it can prevent leakage and improve cementing quality. The strength and hydration mechanism of the solidified sample were analyzed. It was found that the essence of the development of the curing strength of the working liquid was the destruction of the vitreous structure of the curing agent by OH~-. By adjusting the formula, the solidified samples from 30 鈩，

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