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用岩心进行的室内试验,目的在于研究超声波使更多原油流动的效果。在原油原始地质储量和最初水驱后的残余油饱和度状态下进行了超声波激励,计算了油/水相对渗透率,以便评价在进行超声波激励前后情况下的驱替动态,并且确定了采收率;绘制了水的分流量曲线,以便确定在进行和没进行超声波激励情况下水突破后的平均含水饱和度;研究了超声波激励对未胶结岩样的影响。结果显示,在不同机理的作用下增加了驱油量,生成的超声波与孔隙介质中流体的相互作用使渗透率和水突破发生了变化。在残余油饱和度状态下进行超声波激励的采收率高于在原油原始地质储量状态下进行超声波激励的采收率,因此建议把该方法用于衰竭油藏。因为出砂,建议不要把超声波激励用于抗压强度低于1.03MPa(未胶结)的地层。
In-house tests conducted with cores aimed at studying the effect of ultrasound on the flow of more crude oil. Ultrasonic excitation was performed with the original geological reserves of crude oil and the residual oil saturation after the initial waterflooding, and the relative permeability of oil / water was calculated in order to evaluate the displacement dynamics before and after the ultrasonic excitation and to determine the recovery The water cutoff curves were plotted to determine the average water saturation after water breakthrough with and without ultrasonic excitation. The effect of ultrasonic excitation on the unaggregated rock samples was investigated. The results show that the oil displacement is increased under the action of different mechanisms, and the interaction between the generated ultrasonic wave and the fluid in the pore medium changes the permeability and water breakthrough. The recovery of ultrasonic excitation under residual oil saturation is higher than the recovery of ultrasonic excitation under the crude oil original geological reserve, so it is suggested to use this method in depleted reservoirs. Because of the sanding, it is not recommended to use ultrasonic excitation in formations with a compressive strength of less than 1.03 MPa (non-cemented).