Research on the Multi-energy Complementary Model Achieved Through the Coupling of Oilfield-Associated Geothermal Energy and Petrochemical Waste Heat

In response to the problems of large consumption of fossil energy, low utilization rate of clean energy, and large pollutant emissions in oilfield chemical cities, a study on the multi-energy complementary mode is carried out. Relying on the unique geothermal resources, coupling with petrochemical waste heat, and tapping the work capacity of the heating steam in the thermal power plant, the zero consumption of fossil energy for heating in oilfield production and daily life is achieved. The heating steam of the thermal power plant is used to drive an absorption heat pump to extract petrochemical waste heat and supply it to the heating network. Steam with an equivalent amount of heat energy is displaced, which is then used to drive an absorption heat pump to extract the associated geothermal energy of the oilfield. In this way, the “petrochemical waste heat” is used to drive the absorption heat pump to produce high-grade heat energy for heating in oilfield production and daily life. Through model analysis, compared with the mode of solely using the associated geothermal energy of the oilfield, in the multi-energy complementary mode of coupling the associated geothermal energy of the oilfield with petrochemical waste heat, the utilization rate of surplus waste heat energy is 254%, the consumption of standard coal is 4%, the carbon emissions are 14.8%, and the internal rate of return reaches 14%.This mode innovatively realizes the coordinated and efficient cascade utilization of the associated geothermal energy of the oilfield and petrochemical waste heat, providing a new technical path for the low-carbon transformation of oilfield cities.