Development of an Optimal Thermochemical Composition for the Displacement of Heavy Oils From Reservoirs

This research focuses on the development and evaluation of a newly formulated reactive composition aimed at improving the efficiency of thermochemical methods in heavy oil recovery. The composition, consisting of chromium anhydride, methyl and isopropyl alcohols, sulfanol, and seawater, was tested under high-temperature conditions (approximately 800°C). Experimental results revealed that this mixture significantly enhanced the flow characteristics of oil within the reservoir. Through laboratory experiments, it was observed that the application of the reactive blend led to a reduction in interfacial tension down to 1.5 mN/m and increased oil recovery rates up to 84%. These outcomes indicate that the proposed formulation effectively reduces oil viscosity, enhances displacement efficiency, and facilitates improved mobility of oil in porous media. The simple preparation process and compatibility with field-scale operations further highlight its practical value.At present, submarine gas pipelines continue to develop, accounting for 45% of natural gas exports to the west. Therefore, before the submarine is laid, the entire route along the seabed must be carefully studied, and all potential obstacles, including the sunken ship, including large rocks, must be identified, eliminated or bypassed. Subsea pipelines are the safest, most cost-effective, and most environmentally friendly route. Additionally, the environmental impact of the method was evaluated. The absence of hazardous components and the low generation of waste during application support the eco-friendly nature of this approach. Pilot tests conducted in field conditions confirmed the technological and economic advantages of the system. In conclusion, this method offers promising potential for enhancing heavy oil extraction, maintaining reservoir pressure, and optimizing the use of natural resources in a more sustainable and cost-effective manner.