纳米乳化石蜡钻井液在延长低渗油田的应用

Application of Nano-wax emulsion environmental protection drilling fluid in YanChang low permeability oilfield

石蜡纳米乳液与延长低渗油藏常用聚合物钻井液体系有良好的配伍性,可改善体系的流变性,降低滤失量,具有明显的润滑效果和抑制粘土水化膨胀与分散的能力,对岩心损害程度低,油层保护效果好。石蜡纳米乳液在延长油田成功进行了5口井现场试验,结果证明,加入石蜡纳米乳液后,井壁无坍塌,起下钻畅通,完井电测及下套管作业顺利,钻井时效提高,油气产量高,环保效果好。石蜡纳米乳液钻井液适用于延长油田定向井的钻井施工,可在延长油田推广使用。

Nano-wax emulsion has good compatibility with polymer drilling fluid used in YanChang low permeability reservoir. It could improve the rheological characteristic, and reduce the filtration loss. It has obvious lubricating effect and clay hydration and dispersion inhibition ability. It could reduce the core damage and protect the reservoir. Nano-wax emulsion has been successfully applied in 5 wells in Yanchang oilfield. Results showed that, adding nano-wax emulsion, wellhore was stable, tripping was unblocked, electrical measurement and casing worked smoothly, oil production improved, and environmental was protected. Nano-wax emulsion was suitable for YanChang oil field directional wells, and the application should be spread.