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钙基聚磺钻井液在南页1井的应用

Fine and Specialty Chemicals(2018)

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Abstract
南页1井是四川盆地川东南构造带南川断鼻上的一口页岩气预探井,针对地层易坍塌以及存在微裂缝、石膏层、煤层等较复杂的特性,优化了钻井液体系,即在聚磺钻井液体系的基础上引入钙离子,变成钙基聚磺钻井液体系.该体系在南页1井的应用表明,体系高温稳定性强、抑制防塌能力好、流变性能优良,有效解决了页岩气水基钻井液井壁失稳问题以及盐膏侵、酸性气体侵等问题.
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