Numerical Study of Simultaneous Multiple Fracture Propagation in Changning Shale Gas Field
| Autor: | Wei Yu, Jun Xie, Haoyong Huang, Kan Wu, Juan Chen, Sang Yu, Fan Yu |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2019 |
| Předmět: |
Changning shale gas
Work (thermodynamics) Control and Optimization 020209 energy Perforation (oil well) Energy Engineering and Power Technology 02 engineering and technology 010502 geochemistry & geophysics 01 natural sciences lcsh:Technology Stress (mechanics) Hydraulic fracturing 0202 electrical engineering electronic engineering information engineering Cluster (physics) Electrical and Electronic Engineering Engineering (miscellaneous) 0105 earth and related environmental sciences cluster efficiency Renewable Energy Sustainability and the Environment lcsh:T perforating number Mechanics Unconventional oil multiple fracture propagation Fracture (geology) Oil shale Geology Energy (miscellaneous) |
| Zdroj: | Energies, Vol 12, Iss 7, p 1335 (2019) Energies Volume 12 Issue 7 Pages: 1335 |
| ISSN: | 1996-1073 |
| Popis: | Recently, the Changning shale gas field has been one of the most outstanding shale plays in China for unconventional gas exploitation. Based on the more practical experience of hydraulic fracturing, the economic gas production from this field can be optimized and gradually improved. However, further optimization of the fracture design requires a deeper understanding of the effects of engineering parameters on simultaneous multiple fracture propagation. It can increase the effective fracture number and the well performance. In this paper, based on the Changning field data, a complex fracture propagation model was established. A series of case studies were investigated to analyze the effects of engineering parameters on simultaneous multiple fracture propagation. The fracture spacing, perforating number, injection rate, fluid viscosity and number of fractures within one stage were considered. The simulation results show that smaller fracture spacing implies stronger stress shadow effects, which significantly reduces the perforating efficiency. The perforating number is a critical parameter that has a big impact on the cluster efficiency. In addition, one cluster with a smaller perforating number can more easily generate a uniform fracture geometry. A higher injection rate is better for promoting uniform fluid volume distribution, with each cluster growing more evenly. An increasing fluid viscosity increases the variation of fluid distribution between perforation clusters, resulting in the increasing gap between the interior fracture and outer fractures. An increasing number of fractures within the stage increases the stress shadow among fractures, resulting in a larger total fracture length and a smaller average fracture width. This work provides key guidelines for improving the effectiveness of hydraulic fracture treatments. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
| Nepřihlášeným uživatelům se plný text nezobrazuje | K zobrazení výsledku je třeba se přihlásit. |