新型处理剂在Halfaya油田高密度钻井液中的应用
Oil Drilling & Production Technology(2014)
Abstract
Halfaya油田地质复杂,高压盐膏层钻进过程中极易发生泥包、蠕变缩径、高密度钻井液被高浓度Ca2+污染等问题,钻井液维护难点在于抑制软泥岩分散、稳定pH值、除Ca2+相互关联。通过优选和优化钻井液处理剂,引入聚胺盐类抑制剂BZ-HIB和新型除钙剂BZ-DCA,改进施工技术措施,较好地解决了高密度钻井液流变性控制、除Ca2+、稳定pH值等问题,在提高钻速、降低维护难度等方面效果明显。
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