Conventional heavy oil has abundant reserves and low recovery efficiency in offshore oilfields. Autogenous heat technology uses 2-3 kinds of inorganic salt solution to produce inert gas and release a lot of heat under the action of a catalyst. It is applied to improve heavy oil recovery of the offshore oilfield. This paper applies experimental schemes such as viscosity reduction rate evaluation, heat conditions, gas production conditions, reaction rate control, and effect of environmental factors. This paper evaluates the performance of the autogenous heat system, optimizes the process parameters, and designs the process scheme and construction scheme according to the oil well production. This paper researches an autogenous heat system with nontoxic and high heat production and optimizes the catalyst type, concentration, and time to reach exothermic peak. When the concentration of the thermogenic agent is 1.5 mol/L in the autogenous heat system, the range of temperature rise is 67°C, which achieves the target requirement of more than 50°C. Field application shows that the autogenous heat system can effectively reduce the viscosity of heavy oil, dissolve solid paraffin, clean organic scale, improve reservoir permeability, and increase heavy oil production. This paper applies autogenous heat technology to improving the efficiency of heavy oil recovery of the offshore oilfield. Research conclusions show that the autogenous heat system can effectively reduce the viscosity of heavy oil, improve reservoir permeability, and increase heavy oil production.

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海上油田自热技术研究：实验研究、工艺设计与应用

海上油田常规稠油储量丰富，采收率低。自热技术是利用2-3种无机盐溶液在催化剂的作用下产生惰性气体并放出大量热量。用于提高海上油田稠油采收率。本文采用降粘速率评价、加热条件、产气条件、反应速率控制、环境因素影响等实验方案。本文对自热系统的性能进行了评价，优化了工艺参数，并根据油井生产情况设计了工艺方案和施工方案。本文研究了一种无毒、高产热的自热系统，优化了催化剂的种类、浓度、和达到放热峰值的时间。自热系统中生热剂浓度为1.5mol/L时，温升幅度为67℃，达到50℃以上的目标要求。现场应用表明，自热系统能有效降低稠油粘度，溶解固体石蜡，清除有机垢，提高油藏渗透率，提高稠油产量。本文应用自热技术提高海上油田稠油采收效率。研究结论表明，自热系统能有效降低稠油黏度，提高油藏渗透率，提高稠油产量。温升范围为67°C，达到50°C以上的目标要求。现场应用表明，自热系统能有效降低稠油粘度，溶解固体石蜡，清除有机垢，提高油藏渗透率，提高稠油产量。本文应用自热技术提高海上油田稠油采收效率。研究结论表明，自热系统能有效降低稠油黏度，提高油藏渗透率，提高稠油产量。温升范围为67°C，达到50°C以上的目标要求。现场应用表明，自热系统能有效降低稠油粘度，溶解固体石蜡，清除有机垢，提高油藏渗透率，提高稠油产量。本文应用自热技术提高海上油田稠油采收效率。研究结论表明，自热系统能有效降低稠油黏度，提高油藏渗透率，提高稠油产量。提高油藏渗透率，提高稠油产量。本文应用自热技术提高海上油田稠油采收效率。研究结论表明，自热系统能有效降低稠油黏度，提高油藏渗透率，提高稠油产量。提高油藏渗透率，提高稠油产量。本文应用自热技术提高海上油田稠油采收效率。研究结论表明，自热系统能有效降低稠油黏度，提高油藏渗透率，提高稠油产量。