【摘要】 研究并测试了不同起泡剂、稳定剂及黏土对耐盐耐温耐油微泡钻井液的影响。实验发现耐温耐盐的微泡钻井液与起泡剂和稳定剂的结构有关,而起泡体系的耐油性与各种物质在泡沫界面的吸附状态有关。选用具有枝型结构的发泡剂和具有耐盐、耐温结构的起泡剂和稳定剂制备微泡体系,可使其具有好的耐盐、耐高温老化的性质,选择适当的无机有机物质进行复配,可在泡沫界面形成亲油但是不溶油的弱极性界面吸附层,使体系有很好的耐油性。由DM5512、甜菜碱、烷基糖苷、1631混合制备成了离子型复合起泡剂QR-1,由HPMC、SMP-Ⅱ和SP-8混合制备成了稳定剂WD-1。实验评价了由QR-1、WD-1和黏土在矿化度为10×104mg/L的基液中配制的微泡钻井液的耐盐、耐高温老化和耐油性能,证实了以上结论并探讨了其机理。更多还原

【Abstract】 In this paper,effects of different foaming agents,stabilizers and clay are researched for the high temperaturesalt-tolerant and oil-stable micro-bubble water base drilling fluid system.The experimental results show that the stability ofthis drilling fluid system is affected by the structures of foamers and stabilizers,and the oil-tolerance capability of foamingsystem is affected by adsorbing conditions of materials on the bubble interface.Ramiform foamers,high temperature salt-tolerant frothers and stabilizers,some suitable organic and inorganic materials are optimized to combine,which can forma hydrophobic but oil-insoluble weak polar interface adsorbing film on the bubble face.An ionic combined frother QR-Ⅰ isdeveloped by DM5512,betaine,alkyl polyglycoside and 1631,and a stabilizer WD-Ⅰ is obtained by HPMC,SMP-Ⅱand SP-8.In laboratory,the drilling fluid system,prepared by QR-1,WD-1,clay,and base fluid with salinity of 10x104mg/L,isevaluated,which confirms the above conclusions,also the mechanism is discussed.更多还原