KCl钻井液在乌国咸海区域两口探井的应用

West-china Exploration Engineering(2013)

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Abstract
针对咸海区块第三系地层成岩性较差、水敏性强易引起水化膨胀缩径和下部侏罗纪地层井壁坍塌等技术难题,通过对国内外KCl钻井液技术调研、室内研究与现场实践相结合,优选适用于咸海区域的KCl钻井液体系配方,并在WA-2A和Sulama-1EX井2口探井中得到了成功应用。现场应用结果表明,该钻井液体系性能稳定、抑制防塌能力强、抗盐抗钙能力强、流变性好等优点,钻井过程中井壁稳定,复杂时效大大低,充分满足了咸海区域的钻井要求。
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