CAJ | 학술논문

针对目前低渗透油水两相油藏渗流压力分布规律研究较少,且未考虑含水饱和度沿径向不均匀分布等问题,在充分考虑到水驱前缘突破油井后,含水饱和度沿油藏径向不均匀分布的情况下,建立了考虑启动压力梯度的油水两相径向稳定渗流模型,并推导出了压力分布方程。利用实验数据,结合径向Buckley-Leverett方程获得油水两相启动压力梯度以及两相流度与径向距离r的函数关系,代入到求解的压力分布方程中求出该油藏的最终压力分布,并结合实例进行计算。
침대목전저삼투유수량상유장삼류압력분포규률연구교소,차미고필함수포화도연경향불균균분포등문제,재충분고필도수구전연돌파유정후,함수포화도연유장경향불균균분포적정황하,건립료고필계동압력제도적유수량상경향은정삼류모형,병추도출료압력분포방정。이용실험수거,결합경향Buckley-Leverett방정획득유수량상계동압력제도이급량상류도여경향거리r적함수관계,대입도구해적압력분포방정중구출해유장적최종압력분포,병결합실례진행계산。
Because of rarely studying on pressure distribution of oil-water seepage in low-permeability reservoir and not considering uneven distribution of water saturation along radial direction,a radial oil-water seepage model considering start-up pressure gradient was established under the condition of uneven distribution of water saturation along reservoir radial direction after completely considering waterflood front breakthrough oil well.And a pressure distribution equation was deduced.The functional relation between radial distance （r） and two-phase fluidity and start-up pressure gradient is obtained by adopting radial Buckley-Leverett equation and experimental data.The relationship was put in the pressure distribution equation to obtain the final pressure distribution of the reservoir by combining with an actual example.