含气活油高凝油相渗曲线测定及特征

发布时间：2018-12-13 06:24

【摘要】：目前,油水相渗曲线测量实验中普遍采用脱气原油作为实验用油,无法模拟实际储层中原油含气,设计实验使用含气高凝油,通过在恒温箱中利用高压活油瓶进行转样来保持原油高温高压条件和原始含气量,利用非稳态法测量得到含气活油高凝油相对渗透率曲线,并对曲线的特征规律及其影响因素进行研究。结果表明:含气活油相渗曲线与脱气原油相比,油相相对渗透率较高,水相相对渗透率较低,残余油饱和度降低,水驱油效率增加,含水上升变慢;随着实验温度降低,油相相对渗透率降低,水相相对渗透率提高,残余油饱和度显著升高,含水上升快,驱油效率降低;储层渗透率在高温条件下对相渗曲线特征影响较小,但在析蜡温度以下时,低渗储层的残余油饱和度与束缚水饱和度都要明显高于高渗储层,水驱油效果较差,该研究实现了对高凝油油藏相渗曲线的精准刻画。
[Abstract]:At present, degassing crude oil is widely used as experimental oil in oil-water phase permeability curve measurement experiment, so it is impossible to simulate the gas content of crude oil in actual reservoir. The relative permeability curve of high condensable oil containing live oil was obtained by using unsteady state method to keep crude oil high temperature and high pressure condition and original gas content by using high pressure live oil bottle in constant temperature box. The characteristic law of the curve and its influencing factors are studied. The results show that the permeability curve of gas-bearing active oil phase is higher than that of degassed crude oil, the relative permeability of oil phase is higher, the relative permeability of water phase is lower, the saturation of residual oil decreases, the efficiency of water drive increases and the water cut increases slowly. With the decrease of experimental temperature, the relative permeability of oil phase decreases, the relative permeability of water phase increases, the residual oil saturation increases significantly, the water cut rises quickly, and the oil displacement efficiency decreases. The permeability of the reservoir has little influence on the characteristics of the phase permeability curve at high temperature, but the residual oil saturation and the irreducible water saturation of the low permeability reservoir are obviously higher than those of the high permeability reservoir when the waxing temperature is lower than that of the high permeability reservoir, and the effect of water flooding is poor. In this study, the accurate characterization of the oil reservoir phase permeability curve is realized.
【作者单位】：中国石油大学(北京)石油工程教育部重点实验室;中国石油新疆油田分公司风城油田作业区;
【基金】：国家科技重大专项课题“苏丹3/7区高凝油油藏高效开发技术”(2011ZX05032-002)
【分类号】：TE312

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