Keywords oil-in-water drilling fluid;formulations;high heat resistance;freeze tolerancy;mixed anionic/nonionic emulsifiers;screening technique;reservoir drilling fluid;

• 关键词水包油钻井液;配方研究;耐高温性;耐冷冻性;阴离子/非离子混合乳化剂;筛选方法;储层钻井液;