裂缝性油藏单井渗流规律研究

在进行裂缝性油藏渗流理论研究时，用常规方法难以对随机分布在储层中且不与油水井相连通的天然裂缝进行处理。为此，根据等值渗流阻力原理，将天然裂缝表征成果应用到油田开发研究中，考虑天然裂缝表征参数对渗流特征的影响，建立了裂缝性油藏单井稳态渗流的理论模型。用实际油藏参数进行了实例计算，研究了裂缝长度、裂缝开度、裂缝数目、裂缝线密度及裂缝与油井的相对距离等参数对压力分布和产量的影响。结果表明，在距井约10m范围内天然裂缝对压力分布和产量的影响大，超过10m，对压力分布和产量的影响减小；裂缝开度、数量和线密度超过一定值后天然裂缝对压力分布和产量的影响程度减小。

Study on Steady-State Seepage Flow of Single Well in Naturally Fractured Reservoirs

It is very difficult to use the conventional method to handle the stochastically distributed natural fractures which do not connected with the wells in the theoretical study of the naturally fractured reservoirs.Therefore,according to equivalent resistance method,a single well stead-state seepage flow theoretical model for in naturally fractured reservoirs was developed considering the impacts of the parameters of natural fractures on characteristics of the seepage flow.Some real naturally fractured reservoirs' parameters were used for calculation.The impacts of fracture length,fracture aperture,fracture number,fracture intensity and distance between the fracture and the wellbore on the pressure distribution and production rate were investigated.The results indicate that the fractures within 10m to the wellbore will have important impacts on the pressure distribution and production rate;the impacts will decrease beyond 10m;and the impacts of fracture aperture,fracture number and intensity on pressure distribution and production rate will decrease after they are higher than some certain value.