摘要
冀中地区第三系油藏东营组与沙河街组地层微裂缝和层理发育良好,硬脆性较强,易剥落掉块,现用防塌剂已不能满足钻井要求。通过以下反应,研制出一种新型井壁稳定剂DLF-50：首先利用分子修饰原理在磺化酚醛树脂分子上引入AMPS、阴离子单体甲基丙烯酸MAA、非离子单体DMAM（N-二甲基丙烯酰胺）和某阳离子单体进行缩合共聚,形成四元共聚物降滤失剂C-P-SMP;然后将其与纳米改性沥青混配,并添加一定量的分散剂,形成该产品。性能评价结果表明,该产品兼具物理和化学双重作用,热稳定性好,在150℃时仍有显著的降滤失效果;同时纳米改性沥青显著提高了泥饼强度和泥饼质量,初始软化温度为80~95℃,最佳使用温度为80~120℃。泽10-108x和宁93x井试验应用加有该处理剂的钻井液后,井眼畅通,井径规则,起下钻无阻卡,无井塌和掉块现象发生,长裸眼条件下井壁稳定。
A new shale stabilizer, DLF-50, was developed for use in the drilling operations in Jidong area, where micro-fractures and beddings are developed in the brittle Tertiary formations such as the Dongying formation and Sahejie formation. The DLF-50 was synthesized with AMPS, methacrylic acid(MAA), n-dimethylacrylamide(DMAM), a cationic monomer, a nano modified asphalt, and a dispersant. DLF-50 has good filtration control capacity even at 150 ℃. In field applications of DLF-50 in Well Ze10-108 x and Well Ning93 x, gauge holes were drilled, with no drag and resistance ever met during tripping, and no borehole collapse and cave-in ever encountered in long open hole drilling.
出处
《钻井液与完井液》
CAS
北大核心
2015年第4期17-20,105,共4页
Drilling Fluid & Completion Fluid
关键词
井眼稳定
防塌剂
四元共聚
纳米改性沥青
降滤失
泥饼强度
抗盐
抗温
Quadri-polymerization
Nano modified asphalt
Effect of filtration control
Strength of mud cake
Salt tolerant
High temperature resistance
