Volume 62

Physical Simulation Study on Different Displacement Methods for Shallow Thin Extra-Heavy Oil Xiang Li, Huiqing Liu, Chao peng, Luo Chen, Xiaohu Dong, Song Zhou, Yue Pan

Abstract

The Chunfeng Oilfield represents a typical shallow-buried, thin reservoir of extra-heavy oil. Following multiple rounds of steam huff and puff, the field faces challenges such as declining formation pressure, reduced heating radius, decreased periodic production, and a sharp increase in periodic water cut. This study utilizes geological data and production statistics from the Chunfeng Oilfield to design physical simulation experiments for various development methods following high-cycle steam huff and puff, grounded in similarity criteria. The research validates the temperature distribution characteristics and production dynamics associated with high-cycle steam huff and puff, allowing for a comparative analysis of temperature distribution and production dynamics across different development methods at various stages. The results indicate that the N2 and VR composite steam flooding exhibits the highest levels of steam chamber development, production duration, and recovery rates, achieving a stage recovery rate of 42.3%. These findings provide valuable insights for the development of shallow-thin extra-heavy oil reservoirs.

Keywords The shallow-thin extra-heavy oil reservoirs, steam huff and puff, multi-component thermal composite flooding, simulation