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低渗、特低渗储层岩性致密、孔喉半径小、渗透率小,原油流动能力差,开采难度大。而油相渗透率代表了油的流动能力,油相渗透率越大,原油在储层中越容易流动,原油也越容易被开采出来。因此,如何提高油相渗透率成为解决低渗、特低渗油藏开发问题的有效手段。本文对鄂尔多斯盆地部分储层的原油流动能力进行了分析。结果表明,含水饱和度、粘土矿物含量、润湿性是影响油相流动能力的主要因素。含水饱和度越高,储层油相流动能力越差;粘土矿物含量越高,储层油相流动能力越差;岩石物性一致的情况下亲水岩心的油相渗透率大于亲油岩心的油相渗透率。
Low permeability, ultra-low permeability reservoir lithology is tight, pore throat radius is small, permeability, crude oil flowability is poor, difficult to extract. The oil phase permeability represents the oil flow ability. The larger the oil phase permeability, the easier the crude oil will flow in the reservoir and the easier the crude oil will be extracted. Therefore, how to improve the permeability of oil phase is an effective way to solve the problem of low permeability and extra low permeability reservoir development. This paper analyzes the crude oil flow capacity of some reservoirs in the Ordos Basin. The results show that water saturation, clay mineral content and wettability are the main factors that affect the oil flowability. The higher the water saturation, the poorer the fluidity of the oil phase in the reservoir. The higher the clay mineral content is, the poorer the fluidity of the oil phase in the reservoir. In the case of consistent petrophysical properties, the oil phase permeability of the hydrophilic core is larger than that of the oleophilic core Phase permeability.