为了提高水平井压裂效果的成功率和有效率,在压前的施工设计中要充分考虑裂缝参数的优化。针对水平井压裂特点,在非均质低渗透油藏模型的基础上,以数值模拟软件Eclipse为技术手段,对影响水平井压裂后产量的裂缝参数包括裂缝方位、裂缝位置、裂缝条数和非均匀裂缝长度等进行了优化研究。研究结果表明,水平井产量随着裂缝条数、裂缝长度和裂缝导流能力的增加而增加;对于不同裂缝布局,根部和端部裂缝的间距小于内部裂缝的间距;由于裂缝的干扰作用,不同位置的裂缝产量不同,处在中间位置的裂缝产量最低。

The fracture optimization should be considered in the design for the fracturing constriction before it is put into practice to have more effective fractures. In view of the characteristics of fractured horizontal wells, in this paper, with the concept model of the non-homogeneous media and the low permeability reservoir and with the Eclipse reservoir simulation software, the fracture parameters are optimized, including the fracture azimuth, the fracture position, the fracture number and the non-uniform fracture length. The results show that the production of the horizontal oil increases with the increase of the number, the length and the conductivity of fractures; for different fractural layouts, the fractures are always in the stagger, with the distance among the outer fractures smaller than that among the inner fractures. Because of fracture's mutual interference actions, different fractures are related with different production rates, and the production related with the most inner fractures turns out to be the lowest.