Feasibility and key technologies for synergistic development of steam huff-and-puff and steam flooding in shallow-layer high pour-point oil reservoirs

doi:10.3969/j.issn.1006-6535.2026.02.007

Abstract

Abstract: In response to the increased difficulty in development and production stabilization caused by low formation temperature and low formation pressure in shallow-layer high pour-point oil reservoirs,a comparative study was conducted using one-dimensional and two-dimensional scaled physical simulation apparatuses to evaluate three development methods:water flooding,cyclic steam stimulation,and steam flooding assisted by cyclic steam stimulation.The feasibility of cyclic steam stimulation and steam flooding assisted by cyclic steam stimulation was verified,and the optimal development mode was determined.The results show that water flooding exhibits critical deficiencies,including low recovery efficiency,pronounced risk of water channeling,and deterioration of crude oil properties.Cyclic steam stimulation effectively enlarges the reservoir heating radius,achieving a stage oil displacement efficiency exceeding 40% and a recovery factor greater than 25%.Under the steam flooding plus cyclic steam stimulation assisted development mode,the ultimate recovery factor can exceed 50%,while the produced crude oil properties remain stable.During the development process,it is necessary to simultaneously ensure adequate heat supply and energy replenishment to maintain the formation temperature consistently above the wax appearance temperature of the crude oil.This study not only fills a gap in dedicated research on the development of shallow-layer high pour-point oil reservoirs,but also provides reliable experimental evidence and key technical support for the efficient development of similar reservoirs.

Key words: shallow-layer high pour-point oil, steam huff and puff, cold damage induced by water injection, physical simulation, wax appearance temperature, recovery degree

CLC Number:

TE39

WANG Guodong, YANG Xingchao, FENG Tian, LI Xin, JIA Dalei. Feasibility and key technologies for synergistic development of steam huff-and-puff and steam flooding in shallow-layer high pour-point oil reservoirs[J]. Special Oil & Gas Reservoirs, 2026, 33(2): 64-71.

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