The Horizontal Extended Velocity Model of Steam Chamber Front in Dual-Well SAGD Process
The dual-well steam-assisted gravity drainage (SAGD) process could effectively enhance the oil recovery, and the heat transfer on stream chamber front plays the key role on SAGD process efficiency. The expanding velocity of steam chamber front directly characterizes heat transfer efficiency, which is also important index to evaluate SAGD process and to identify effectively development scheme. The existing theoretical model simplifies expansion process as flat propulsion, while the angle could change during the actual process. In this paper, it was assumed that the extension of steam chamber has two patterns: plate expansion process and sector expansion process. The horizontal extended velocity model of plate expansion process and the angular velocity model of sector expansion process were built based on derivation of the heat-transfer mechanism model. These two different velocities could be calculated with the actual data coming from an SAGD process in Xinjiang Oilfield, and the comparable results suggested that the angle change could not be ignored as the difference between these two velocities could be up to 15%.
KeywordsSAGD Dual horizontal wells Stream chamber front Horizontal extended velocity model Heat-transfer mechanism model
The authors are grateful for the financial support of the National Science and Technology Major Project of China (2016ZX05012002-004).
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