Volume 50

Three-dimensional Physical Simulation of Multi-component Thermal Composite Flooding in Shallow-thin Ultra-heavy Oil Reservoirs Song Zhou , Huiqing Liu, Chen Luo, Yunfei Guo, Qinzhi He

Abstract

Block C of Sinopec Shengli Oilfield is a typical shallow-thin ultra-heavy oil reservoir. After multiple cycles of steam huff and puff, the reservoir faces issues such as low utilization, low well production, and high water cut. Based on the geological and production parameters of the target block, a three-dimensional physical simulation experiment was designed to transition from steam huff and puff to multi-component thermal composite flooding. The study examined the temperature field and production dynamics characteristics at different stages. The results indicate that during the steam huff and puff stage, the heating range of the reservoir was limited, resulting in a poor development effect, with an oil recovery rate of only 10.4%. In the multi-component thermal composite flooding stage, through the synergistic effect of viscosity reducers, nitrogen, and steam, the final oil recovery reached 57.1%. These findings provide useful insights for the development of shallow-thin ultra-heavy oil reservoirs.

Keywords The shallow-thin ultra-heavy oil reservoirs, steam huff and puff, multi-component thermal composite flooding, three-dimensional physical simulation