Viscosity reducer for thickened oil and application thereof

• Main Authors: QI YIBIN, ZHANG SUOBING, XU TING, WANG HAITAO, LYU CHENGYUAN, LUN ZENGMIN, ZHOU XIA
• Format: Patent
• Language: Chinese; English
• Published: 25.08.2020
• Subjects: ADHESIVES; CHEMISTRY; DYES; EARTH DRILLING; EARTH DRILLING, e.g. DEEP DRILLING; FIXED CONSTRUCTIONS; MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FORELSEWHERE; METALLURGY; MINING; MISCELLANEOUS APPLICATIONS OF MATERIALS; MISCELLANEOUS COMPOSITIONS; NATURAL RESINS; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR ASLURRY OF MINERALS FROM WELLS; PAINTS; POLISHES

The invention belongs to the technical field of thickened oil recovery, and particularly relates to a viscosity reducer for thickened oil and application thereof. The viscosity reducer for thickened oil is prepared from rhamnolipid and fatty alcohol-polyoxyethylene ether. The viscosity reducer for thickened oil provided by the invention can tolerate oil reservoir produced water with a concentration sum of calcium and magnesium ions being less than or equal to 4000 mg/L, does not damage a stratum, and protects the environment. In addition, the viscosity reduction rate of the viscosity reducer to thickened oil with viscosity smaller than or equal to 75000 mPa.s is 98.5% or above. The viscosity reducer for thickened oil has a viscosity reduction rate of 95.1% or more for thickened oil havinga viscosity of greater than 75000 mPa.s and less than or equal to 120000. 本发明属于稠油开采技术领域一种稠油降粘剂，更具体地，涉及一种稠油降粘剂及其应用。其中，所述稠油降粘剂包括鼠李糖脂以及脂肪醇聚氧乙烯醚。本发明提供的稠油降粘剂能够耐受钙镁离子的浓度之和为小于或等于4000mg/L的油藏产出水，并且不损害地层，保护环境。不仅如此，该稠油降粘剂对粘度小于或等于75000mP