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发明授权
CN105754563B 一种适用于大位移井的有机盐钻井液 有权 转让

一种适用于大位移井的有机盐钻井液
摘要：
本发明公开了一种适用于大位移井的有机盐钻井液，包括1‑4％的膨润土、0.3‑0.5％的碳酸钠、0.5‑1％的氢氧化钠、0.3‑1％的黄原胶、2‑8％的降滤失剂、2‑5％的纳米封堵剂、1‑4％的封堵剂、0.5‑4％的润滑剂、40‑60％有机盐、25‑250％惰性加重剂，所述纳米封堵剂为甲基丙烯酸甲酯基笼状低聚倍半硅氧烷、N‑异丙基丙烯酰胺和丙烯酰胺共聚而成；所述封堵剂为N‑异丙基丙烯酰胺、丙烯酰胺和N,N‑亚甲基双丙烯酰胺聚合而成；所述润滑剂为蓖麻油聚氧乙烯醚、聚乙二醇、聚乙烯基吡咯烷酮复配而成，该有机盐钻井液具有封堵性能强，润滑性能强，流变性好，携岩屑能力强，尤其适用于大位移井的开发。
摘要（英）：

The invention discloses an organic salt drilling fluid applicable to extended-reach wells.The organic salt drilling fluid comprises 1-4% of bentonite, 0.3-0.5% of sodium carbonate, 0.5-1% of sodium hydroxide, 0.3-1% of xanthan gum, 2-8% of filtrate reducer, 2-5% of nanometer plugging agent, 1-4% of plugging agent, 0.5-4% of lubricant, 40-60% of organic salt and 25-250% of inert weighting agent, wherein the nanometer plugging agent is formed by copolymerization of MAPOSS, N-isopropylacrylamide and acrylamide, the plugging agent is formed by copolymerization of N-isopropylacrylamide, acrylamide and N,N'-methylene diacrylamide, and the lubricant is formed by compounding of castor oil polyoxyethylene ether, polyethylene glycol and polyvinyl pyrrolidone.The organic salt drilling fluid applicable to the extended-reach wells has the advantages of excellent plugging performance, good lubricating property and rheological property and powerful rock debris carrying capability, thereby being particularly applicable to exploitation of the extended-reach wells.

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