Performance of Solvent-Assisted Thermal Drainage process and its relationship to injection parameters: A comprehensive modeling

Líu, Hao; Cheng, Lin; Wu, Keliu; Huang, Shijun; Meng, Lin

doi:10.1016/j.fuel.2018.03.071

Cited by 10 publications

(1 citation statement)

References 59 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Although gas-assisted SAGD and the mechanisms of flow in reservoir development through horizontal well have been extensively researched [45][46][47][48][49][50], its application to the production mechanisms of multithermal fluid-assisted SAGD has seldom been studied, especially for the development of extraheavy reservoirs.…”

Section: Introductionmentioning

confidence: 99%

Experimental Investigation and Numerical Simulation of Dynamic Characteristics for Multithermal Fluid-Assisted SAGD in Extraheavy Oil Reservoir

Zhang

Cao³

et al. 2021

Lithosphere

View full text Add to dashboard Cite

Loss of the vast majority of heat and steam is an unavoidable problem encountered during conventional steam-assisted gravity drainage (SAGD) in extraheavy oil reservoirs. The noncondensate gas coinjection technique of reducing energy consumption and enhancing oil recovery can effectively solve this problem. Aiming at extraheavy oil with a high initial viscosity, the influence of noncondensate gases in multithermal fluids on the physical parameters of extraheavy oil was experimentally studied; the production characteristics and mechanism of multithermal fluid-assisted SAGD were studied through numerical simulation. A comparative investigation of the conventional SAGD and multithermal fluid-assisted SAGD injection schemes was conducted. The characteristics and mechanism of the steam chamber during the production processes were analyzed. The results show that a steam-gas-oil system forms in the steam chamber in the case of multithermal fluids. The steam chamber can be partitioned into four zones, and the flow of the oil mainly occurs in the steam condensation zone and the oil drainage zone. The injected multithermal fluids increase the horizontal expansion of the steam chamber, while the dissolved carbon dioxide reduces the residual oil saturation. Moreover, the nitrogen injection significantly reduces the heat loss and increases the heat utilization for multithermal fluid-assisted SAGD in developing extraheavy oil reservoirs.

show abstract