关键词: 纹层, 韵律, 非均质性, 水淹规律, 剩余油, 数值模拟

Abstract: At present, the studies of waterflooding and distribution of remaining oil that from "Mega" of meter-hundred meters scale turns to "Macro" of centimeter-decimeter scale is the developing tendency for studying reservoirs and the devdeloping performance are in the high water stage.The numerical simulation water-flooding research for heterogeneous oil reservoir in lamina sacle was conducted.An expert knowledge general models of heterogeneous oil reservoir in lamina scale were established.The depositional characteristics of actual reservoirs of these models were analysed, it is considerd that the reservoir of different rhythm types such as positive and opposite rhythm all consist of some small units of positive rhythm.Distribution water-flooding remaining oil in lamina scale was studied, 36 programs were calculated altogether.The effects of rhythmicity (positive and opposite rhythm), beddings (horizontal, oblique and cross bedding), oil viscosity, ratio of vertical and horizontal permeability, permeability, permeability contrast and capillary pressure on water displacement performance and distribution of waterflooding remaining oil were studied.The obtained results showed that the oil viscosity is a very important factor to effect waterflooding characteristic of reservoir, and waterflooding effect for oblique and cross beddings are better than horizontal bedding.Lamina controls subtle distribution of remaining oil which have guiding sense for developing remaining oil in centimeter scale.

Key words: lamina, rhythy, heterogeneity, water displacement performance, remaining oil, numerical simulation