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采用黑油模型,研究了在低渗地层的五点注采井网中,不同储集层渗透率和油井不同含水率下,重复压裂的裂缝穿透率和导流能力等对采油动态的影响。研究表明,重复压裂的效果在很大程度上取决于对复压前原有裂缝和地层的认识上;对具有一定可采储量地层重复压裂时,如果储集层的渗透性较差,应以增加裂缝的穿透率为主,若储集层的渗透性较好,则应主要增加裂缝的导流能力;无因次裂缝导流能力是影响复压后生产动态的一项实质性因素。
The black oil model was used to study the effect of fracturing permeability and diversion capacity of fracturing on the recovery of oil production under different reservoir permeability and different water cut rates of oil wells in the five-point well pattern of the low-permeability formation. influences. The results show that the effect of repeated fracturing depends to a large extent on the understanding of the original fractures and strata before repressuring. For the case of repeated fracturing with some recoverable reserves, if the permeability of the reservoir is poor, In order to increase the permeability of the fractures, if the permeability of the reservoir is better, the diversion ability of the fractures should be mainly increased. The capacity of the non-dimensional fractures to conduct water is a substantial factor .