000			02093nab a2200205 4500
005			20260520002038.0
008			260224s2013 xxu ing
041			_aInglés
245	0	0	_aQuantifying Heat Requirements for SAGD Startup Phase: Steam Injection, Electrical Heating
260			_a _b _cmar. 2013
270			_a03/06/2013 ; 03/06/2013
300			_a5 p. ; 89-94
520			_aTranscripción del resumen del autor. A proper and effective startup of the steam-assisted-gravity-drainage (SAGD) well pairs, where both horizontal wells inject steam, is a key parameter to SAGD performance. In the past, a number of investigations have been conducted on the optimum startup strategy and operational procedures; however, fewer studies have modelled the heat requirements of the process. This study proposes an effective practical method that correlates the heat flux inside the horizontal wellbore with the temperature outside the wellbore wall. A transient conductive-heat-transfer equation in a cylindrical coordinate system is adopted for two different startup strategies: (a) variable heat flux (steam circulation in the well pair) to maintain a constant desired temperature at the wellbore wall and (b) constant heat flux (electrical heating of the well pair) to gradually increase temperature and finally reach a desired temperature on the wellbore wall. A novel and simple mathematical technique is presented for each startup approach to evaluate the instantaneous and cumulative heat requirements to keep the wellbore hot. Excellent agreements between the results of the proposed techniques and outputs of a commercial reservoir simulator are demonstrated. Accurate quantitative evaluation of heat requirements for the startup phase of SAGD enables optimum planning for steam requirements and practical design of any other heat sources employed in the process.
581			_a2
773	0		_tJournal of Canadian Petroleum Technology _g52
942			_cARTICULO
100	1		_aMoini, Behdad _953292
100	1		_aEdmunds, Neil _953293
999			_c187744 _d187744