润湿程度,渗透率对吸渗排油作用的影响

利用美国ＳＳＩ公司的ＣＯＭＰ模拟软件，考察了润湿性、基质渗透率和裂缝渗透率对吸渗排油过程的影响，岩石的润湿程度对基质吸渗速度有显著影响，一般亲水性越强，吸渗排油速度越快，适宜于采用较大的采油速度开采。基质渗透率同样影响吸渗速度，其值越高，吸渗排油越快；如果基质渗透率较低，因其吸渗排油速度低，不宜采用较高的采油速度。裂缝渗透率对整个基质－裂缝系统的驱替过程有显著影响，当裂缝渗透率过高时，整个系统的驱替过程很短，但基质的吸渗排油过程可能还未完毕，从而导致采收率不高。

EFFECT OF WETTABILITY AND PERMEABILITY ON IMBIBITION DISPLACEMENT.

This paper discussed the effect of wettability and permeability of matrix and fracture on imbibition displacement process by applying COMP simulation software of SSI Co. in USA, and concluded that wettability of rock has obvious effect on imbibition velocity of matrix, that is, the stronger wettability reservoir, the faster imbibition velocity, suitable for production with higher oil recovery rate, so does permeability of matrix on imbibition velocity. But if matrix permeability is low, higher recovery rate is not allowed to use due to its low imbibition displacement velocity. Permeability of fracture has a distinct effect on oil displacement processes of whole matrix fracture system. If fracture permeability is too high, the whole oil displacement process of the reservoir might be too short, resulting in low recovery factor under unfinished imbibition displacement process of matrix.