铝胺基钻井液在夏1031HF井的应用

为了解决非常规水平井夏 103-1HF 井三开所面临的井壁稳定、井眼净化、润滑防卡、钻井液流变性控制和油气层保护等钻井液技术难点,通过室内试验对有机胺、铝基聚合物、物理封堵剂、降滤失剂、润滑剂和流型调节剂等进行了优选和复配,确定了铝胺基钻井液的配方。室内评价试验表明,铝胺基钻井液具有强抑制性、强封堵性、优良的润滑性和流变性及抗温性能,其所污染岩心的渗透率恢复率高达90%以上。现场应用表明,铝胺基钻井液流变性能稳定,动塑比保持在0.5左右,API滤失量控制在2.4 mL以内,高温高压滤失量控制在8.0 mL以内,泥饼粘附系数在0.1以内,较好地解决了该井所面临的钻井液技术难点,保证了该井安全顺利完成,且三开井径较规则,平均井径扩大率为2.0%。铝胺基钻井液在夏 103-1HF 井的成功应用表明,该钻井液可以推广应用到该工区其他非常规大斜度井和水平井中。 

Application of Aluminum-Amine Drilling Fluid in Well Xia 103-1HF

In order to solve the challenges posed to drilling fluid such as wellbore stabilization,hole cleaning,lubrication,rheological property control and reservoir protection in 3rd spud section of Well Xia 103-1HF,which is the first unconventional horizontal well in Linpan Region of Shengli Oilfield,aluminum-amine drilling fluid was investigated.The formula of aluminum-amine drilling fluid was optimized through experiments on selecting and compounding amine,aluminum polymer,and physical plugging agents,filtrate reducers,lubricants and rheological regulators.Laboratory evaluation test showed that the aluminum-amine drilling fluid had strong inhibition,strong plugging,good lubrication,good rheological property,good temperature tolerance,with core permeability recovery rate reaching over 90%.Field application showed that the rheological property of aluminum-amine drilling fluid was stable,with the ratio of yield value to plastic viscosity at around 0.5,API filter loss of less than 2.4 milliters,HTHP filter loss of less than 8.0 milliters,and the mud cake adhesion coefficient of less than 0.1.The excellent performance of the drilling fluid enables the smooth and safe drilling of the well,with all the challenges in this well addressed.The 3rd spud section hole is regular,with an average hole diameter enlargement ratio of 2.0%.The successful application of aluminum-amine drilling fluid in Well Xia 103-1HF showed that this drilling fluid could be popularized and applied in other unconventional hig angle wells or horizontal wells in Linpan Region.