西峰白马区润湿反转剂驱模拟研究

西峰油田白马区长8油藏平均渗透率为0.77×10^-3μm²，属低渗透率油藏，储层岩石润湿性普遍存在中性偏亲油性。为了提高原油采收率，针对该油藏条件开展了室内润湿反转剂驱实验和数值模拟研究，优选出适合该油藏的最佳驱油方案为：段塞尺寸为0.1倍孔隙体积，段塞组合为1000mg/L(0.05PV)＋200mg/L(0.05PV)。应用润湿反转剂模型预测最佳驱油方案的原油采收率可以达到36.75％，与注水开发相比提高9％左右，润湿反转剂换油率达到538t/t。可以认为低渗透油藏注润湿反转剂开发是可行的。

THE WETTABILITY REVERSAL AGENT DISPLACING SIMULATION,BAIMA AREA OF XIFENG OIL FIELD

The Chang reservoir 8 in Baima area of Xifeng oilfield is the lowpermeability reservoir with average permeability of 0.77×10^-3μm², the wettability of reservoir rock is normally neutralpartial oil. For improving cruel oil recovery, the experiment of wettability reversal agent displacing in lab and numerical simulation were conducted on the basis of reservoir conditions. The optimal displacing plan that slug size is 0.1 times larger than pore space volume, and the slug combination is 1000mg/L(0.05PV)＋200mg/L(0.05PV). The oil recovery expected with wettability reversal model can be 36.75％,which increases by 9% compared to water injection production, the agent replacing oil ratio is 538ton/ton. The conclusion is that the development plan which the wettability reversal agent is injected to displacing oil in the low permeability reservoir should be reasonable.