Application of an Ultra-high Temperature Drilling Fluid in Deep Well Drilling in Yangshuiwu Buried Hill
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摘要: 华北油田杨税务区块奥陶系储层埋深普遍较深,一般在6000 m以上,地层岩性主要为灰岩、泥岩,井底最高温度预计在210~230℃。继低固相超高温钻井液技术在安探4X井成功应用后,由于该技术所用材料多为国外进口,室内再次研选抗高温处理剂、高温保护剂等关键处理剂,以国产材料替代进口材料,构建了抗230℃的低固相钻井液配方,同时高温滚动实验和高温流变性测试表明:体系具有良好的抗超高温性能,高温条件下的流变性能仍能有效满足携岩要求。目前该套钻井液体系在杨税务区块已经成功开展了7口井现场应用,保障了钻井施工的顺利进行,形成一套满足华北油田冀中区块深潜山地层的超高温钻井液技术。
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关键词:
- 低固相抗超高温钻井液 /
- 高温流变性 /
- 钻井液添加剂 /
- 深井 /
- 杨税务潜山
Abstract: The Ordovician reservoir in the Yangshuiwu block in Huabei Oilfield is buried below 6,000 m, and lithology of the formations drilled are generally limestone and mudstone. The forecast highest bottom hole temperatures are in a range of 210-230℃. A low solids ultra-high temperature drilling fluid has been successfully used in drilling the well Antan-4X. Since many additives in this drilling fluid were imported from foreign countries, high temperature additives and high temperature protection agents were studied and selected from domestically produced drilling fluid additives, and as a result of the study and optimization, a low solids drilling fluid resistant to high temperature of up to 230℃ was formulated. Rolling test and rheology measurement at high temperatures show that this drilling fluid has excellent high temperature property, the rheology of the drilling fluid at elevated temperatures still satisfies the needs of cuttings carrying. This drilling fluid has been successfully used in 7 wells in the Yangshuiwu block, providing an ultra-high temperature drilling fluid technology for use in deep well drilling in buried hill structure in Jizhong block of Huabei Oilfield. -
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