Mechanistic simulation studies on the steam-foam drive in superviscous oil reservoirs

摘要

Based on comprehensive literature collection,the seepage flow mechanism and the physicochemical phenomena involved are studied on the steam-foam driven in superviscous oil reservoirs.A mathematical model for steam-foam drive has been developed,including influencing factors such as surfactant concentration,noncondensing gas content,reservoir heterogeneity,etc.Taking into account specialities such as deep-burial depth and thick-pay zone of Gao-3456 well group in Gao II&OIII block of Gaosheng Oilfield,studies on the steam-foam driven arecarried out using the developed numerical simulator.Corresponding influencing factors and feasibility are studied,the enhanced oil recovery mechanism is also discussed for the steam-foam drive in thick-layer superviscous oil reservoirs,and some instructure results are obtained.