摘要
针对目前水包油乳化钻井液在深部地层钻井中出现的抗温能力不足的问题,室内用自制的抗高温两性离子乳化剂SKT-1、辅助乳化剂Span-80、抗高温增黏剂Dristemp、降滤失剂磺化酚醛树脂(SMP-I)和两性离子包被剂FA-367等配制了抗高温水包油乳化钻井液,研究了钻井液的稳定性、抗温性、高温高压流变性和抗污染能力。研究结果表明,抗高温水包油乳化钻井液最佳配方为:2%钠膨润土+2.5%SMP-I+0.2%Dristemp+0.2%FA-367+0.2%NaOH+2%乳化剂(SKT-1∶Span-80=3∶1)+0.5%硬脂酸铝,清水、柴油体积比5∶5。该钻井液体系流变性良好,密度可在0.90~0.98 g/cm^3范围内调节,抗温达210℃,且稳定性良好;该体系对油气层损害小,可抗20%水污染、20%油污染、2%氯化钠污染和15%钻屑污染,能满足深部地层钻井的要求。
To solve problems of the O/W emulsion drilling fluid applied in deep formation,an O/W emulsion drilling fluid with high-temperature tolerance was developed by using self-made zwitterionic emulsifier SKT-1 with high-temperature tolerance,auxiliary emulsifier Span-80,tackifier Dristemp,filtrate loss reducer sulfomethal phenolaldehy resin（SMP-I）and amphoteric ion coating agent FA-367,and so on. The stability,temperature-resistant property,rheological property at high temperature and high pressure and contamination-resistant property of this drilling fluid were studied. The results showed that the optimum formula of the drilling fluid was obtained as follows：2% sodium bentonite ＋ 2.5% SMP-I ＋ 0.2% Dristemp ＋ 0.2% FA-367 ＋ 0.2% NaOH ＋ 2%emulsifiers（SKT-1∶Span-80=3∶1）＋ 0.5% aluminium stearate,with 5∶5 volume ratio of diesel oil and water. The drilling fluid system had good rheological property,which density was adjusted between 0.90 to 0.98 g/cm^3 and was stable at 210℃. Meanwhile,this drilling fluid had the ability to resist 20% water,20% oil,2% NaCl and 15% cuttings showing little damage to reservoir,which met the drilling requirements of deep formation.
出处
《油田化学》
CAS
CSCD
北大核心
2017年第2期191-195,227,共6页
Oilfield Chemistry
基金
中国石油天然气华北油田公司科技项目"华北油田潜山内幕地层稳定性及防塌防漏技术研究"(项目编号HBYT-2014-JS-236)
关键词
水包油乳化钻井液
深部地层
抗高温
稳定性
O/W emulsion drilling fluid
deep formation
high-temperature tolerance
stability
