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Production analysis in shale gas reservoirs based on fracturing-enhanced permeability areas.
- Source :
- SCIENCE CHINA Physics, Mechanics & Astronomy; Oct2019, Vol. 62 Issue 10, pN.PAG-N.PAG, 1p
- Publication Year :
- 2019
-
Abstract
- Hydraulic fracturing has been widely applied in shale gas exploitation because it improves the permeability of the rock matrix. Fracturing stimulation parameters such as the pumping rate, the fracturing sequence, and the fracture spacing significantly influence the distribution of the stimulated reservoir volume (SRV). In this research, we built a numerical model that incorporates the hydraulic fracturing process and predicts gas production. The simulation of fracture propagation is based on the extended finite element method (XFEM), which helps to calculate aspects of the fractures and the SRV; we imported the results into a production analysis model as the initial conditions for production prediction. Using the model, we investigated the effects of some key parameters such as rock cohesion, fracture spacing, pumping rate, and fracturing sequence on the shale gas production. Our results proved that the SRV was distributed in the vicinity of the main fractures, and the SRVs were connected between the fractures in a small fracture spacing. We obtained optimal spacing by analyzing the production increment. High pumping-rate treatment greatly changes the in-situ stress around the hydraulic fractures and enlarges the field of SRV. Simultaneous fracturing treatment improves the flow conductivity of formation more than sequential fracturing. This study provides insights into the hydraulic fracturing design for economical production. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 16747348
- Volume :
- 62
- Issue :
- 10
- Database :
- Complementary Index
- Journal :
- SCIENCE CHINA Physics, Mechanics & Astronomy
- Publication Type :
- Academic Journal
- Accession number :
- 137362589
- Full Text :
- https://doi.org/10.1007/s11433-019-9427-x