Petroleum Reservoir Evaluation and Development >
2020 , Vol. 10 >Issue 1: 102 - 107
DOI: https://doi.org/10.13809/j.cnki.cn32-1825/te.2020.01.016
Research on fracture propagation of radial well fracturing based on finite element-meshfree method
Received date: 2019-08-01
Online published: 2020-02-04
Radial wells can be used to guide the propagation of hydraulic fractures in order to connect the natural fractures or caves in unconventional reservoirs and improve the recovery of oil and gas resources. Fracturing technology of radial wells has been preliminarily applied and developed in low permeability and shallow reservoirs, but its mechanism is still not very clear. Therefore, the basic principle of FEMM（Finite Element-Meshfree Method） is introduced. Besides, based on the FEMM and the field data, the radial well fracturing model with different well angles is established, and the effect of different azimuth angles on fracture propagation of radial well fracturing is studied. The results show that by using FEMM, it can be verified that radial wells play a guiding role in hydraulic fracturing. In addition, the hydraulic fracture firstly propagates along the direction of radial wells. After extending a certain distance, it turns to the direction of maximum horizontal stress. The bigger the angle between the radial wells and the horizontal maximum principal stress, and the shorter the length of fracture extending along the radial wells, the weaker the guiding ability of radial wells will be. The research results contribute to the application of radial well fracturing technology.
Key words： radial well; hydraulic fracturing; FEMM; orientated propagation; fracture path
Yaofeng ZHANG , Zuliang SHAO , Tao WANG , Yin BO . Research on fracture propagation of radial well fracturing based on finite element-meshfree method[J]. Petroleum Reservoir Evaluation and Development, 2020 , 10(1) : 102 -107 . DOI: 10.13809/j.cnki.cn32-1825/te.2020.01.016
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