吐玉克油田稠油储层矿物特征与敏感性评价

MINERAL CHARACTERS AND SENSIBILITY EVALUATION OF HEAVY OIL RESERVOIR IN TUYUKE OILFIELD

通过X射线衍射物相分析(XRD)和扫描电镜(SEM)等方法探讨了吐玉克油田T2k稠油储层的敏感性矿物组成和产状,利用室内敏感性实验和国外学者研究成果阐明了敏感性矿物和蒸汽驱采油的潜在损害机理。研究表明,粘土矿物的主要类型有高岭石、绿泥石、伊利石和伊/蒙混层矿物四类,而敏感性矿物主要类型有薄膜式、栉壳式、桥接式和孔隙充填式四种;引起研究区储层损害的潜在因素主要是粘土矿物、碱敏和水敏,其次是矿物产状、速敏、酸敏和盐敏,而蒸汽驱采油对储层敏感性矿物的影响因素主要是凝析液pH值和温度。

The damage of heavy oil reservoir is related to mineral characters and steam-flood recovery also exerts an influence on it. The sensibility mineral composition and occurrence of T2k heavy oil reservoir in Tuyuke oilfield were discussed by XRD and SEM method, and the potential damage mechanism of sensibility mineral and steam-flood recovery were explained by using lab. sensibility test and research result of foreign scholar. The research results indicate: the main types of clay mineral in T2k heavy oil reservoir have kaolinite, chlorite, illite, and I/S; sensibility mineral's main types are film, drusy cement, bridging and pore filling; the main potential damage factors of T2k heavy oil reservoir are clay mineral, alkaline sensibility and water sensibility, second are mineral occurrence, rate sensibility, acid sensibility and salinity sensibility; the influence factors of steam-flood recovery on sensibility mineral are mainly pH and temperature of condensed liquid.