Research and Practice on Asphaltene Precipitation and Stimulation of Carbonate Reservoirs in Middle East

论文研究了中东B油田碳酸盐岩储层沥青质析出沉积问题及其解堵增产新技术。研究发现，B油田由于长期衰竭开发导致地层压力下降，进而引发沥青质析出沉积，堵塞储层孔隙，造成油井产量下降。论文通过分析储层微观孔隙结构、沥青质微观状态以及原油和沥青质组分，结合温度和压力影响分析，确定了沥青质析出沉积的主要原因和影响因素。在此基础上，筛选出高效无毒稳定的有机溶剂，并提出了“有机溶剂浸泡 + 酸化”的复合增产措施新技术，现场应用取得了较好的增产效果。The paper investigates the issue of asphaltene precipitation and deposition in the carbonate reservoirs of Oilfield B in the Middle East, as well as a new technology for well stimulation and production enhancement. The study reveals that prolonged depletion-driven development in Oilfield B has led to a decline in formation pressure, triggering asphaltene precipitation and deposition, which blocks reservoir pores and reduces well productivity. By analyzing the microscopic pore structure of the reservoir, the microstate of asphaltenes, and the composition of crude oil and asphaltenes, combined with the effects of temperature and pressure, the primary causes and influencing factors of asphaltene deposition were identified. Based on these findings, a highly efficient, non-toxic, and stable organic solvent was selected, and a novel composite well stimulation technology combining “organic solvent soaking + acidizing” was proposed. Field applications have demonstrated significant production enhancement.