A New Comprehensive Numerical Model for Fracture Diagnosis with Distributed Temperature Sensing DTS
- He Sun (The University of Texas) | Wei Yu (Texas A&M University) | Kamy Sepehrnoori (The University of Texas)
- Document ID
- Society of Petroleum Engineers
- SPE Annual Technical Conference and Exhibition, 9-11 October, San Antonio, Texas, USA
- Publication Date
- Document Type
- Conference Paper
- 2017. Society of Petroleum Engineers
- 5 Reservoir Desciption & Dynamics, 5.1.5 Geologic Modeling, 5.3.2 Multiphase Flow, 5.3 Reservoir Fluid Dynamics, 5.6.11 Reservoir monitoring with permanent sensors
- Distributed Temperature Sensing (DTS), Wellbore Model, Reservoir-wellbore coupling, Temperature Model, Fracturing Evaluation
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The growing acceptance of Distributed Temperature Sensing (DTS) has been contributed by its accurate real-time estimation of the staged fracturing effectiveness. The objective of this study is to develop a new model to simulate fluid flow and temperature profiling of horizontal wellbores with complex fracture geometries. This study offers an enhanced estimation of key reservoir and fracture properties with DTS, which may throw light on the further optimization of the fracturing projects. Specifically, we developed a comprehensive numerical model to simulate flow and temperature field in unconventional reservoir with DTS. In our robust wellbore model, multiphase flow with slippage is simulated accurately. Flow and thermal models are fully coupled between wellbore and reservoir model. The new model was validated with exiting simulator of OLGA and CMG. After validation, we applied our model to simulate single fracture and five fractures cases with varying parameters. The impacts of several parameters, including reservoir matrix permeability, fracture conductivity, reservoir rock thermal conductivity, heat exchange coefficient, fracture spacing, and fracture geometry, on temperature profile along the wellbore were analyzed. Several practical conclusions have been drawn from the sensitivity analysis. Although numerous simulators have been developed to simulate the DTS data, relatively few existing models can handle the multiphase flow with slippage, heterogenous reservoir properties and fracture with complex geometries due to the complexity of the calculations and computational cost. Our model is more rigorous than the prior models to simulate the DTS data through the advanced wellbore and reservoir models.
|File Size||2 MB||Number of Pages||22|
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