Hydraulic fracturing process by using a modified two-dimensional particle flow code - case study

作者：Zhang, Luqing^*; Zhou, Jian; Han, Zhenhua

来源：Progress in Computational Fluid Dynamics, 2017, 17(1): 13-26.

DOI：10.1504/pcfd.2017.081715

• a modified PFC2D model
• isotropic medium
• the laminated rock
• in-situ stress ratio
• fluid injection rate
• dip angle of bedding planes

By using a modified PFC2D model, the authors conducted a series of simulations to examine the influences of in-situ stress ratio, fluid injection rate, anisotropy of laminated rocks, and perforation parameters on hydraulic fracturing process. The simulations indicated that: 1) larger in-situ stress ratio will induce smaller breakdown pressures and faster propagation, and hydraulic fractures will extend along the direction of the maximum principal stress or approach to this preferred path; 2) smaller difference of in-situ stresses or faster fluid injection rate is helpful for creation of complex fracture network; 3) weak layers are preferred locations and directions for fracture initiation and propagation in the laminated rocks; 4) hydraulic fractures initiate easily at the bottoms of perforation channels, and propagate generally along or approaching to the direction of maximum principal stress.

• 出版日期2017
• 单位中国科学院地质与地球物理研究所; 中国科学院大学; 中国科学院地质与地球物理研究所兰州油气资源研究中心