新疆油田稠油油藏基于正交设计的尿素辅助蒸汽吞吐研究

稠油尿素辅助蒸汽吞吐可以扩大蒸汽波及体积,加快采油速度,提高油汽比,最终提高采收率。为此,通过数值模拟,运用正交设计方法,系统研究了不同储层参数对尿素辅助蒸汽吞吐影响程度的显著性。研究结果表明,油层厚度越大,原油黏度越低,渗透率越高,采出程度越低,开发效果越好;在不同油价下油藏开采界限不同,但影响多介质辅助蒸汽吞吐的主次关系相同,主次关系依次为:采出程度油层厚度黏度渗透率,这为不同油价下的开采政策研究及区块筛选奠定了基础。

Urea-assisted steam stimulation based on orthogonal design of heavy oil reservoir in Xinjiang oilfield

Steam stimulation assisted by urea can expand the volume of steam, accelerate oil recovery, increase oil-to-gas ratio, and ultimately improve oil recovery. Therefore, through numerical simulation and orthogonal design, the significance of different reservoir parameters on urea-assisted steam stimulation was systematically studied. The results show that the higher the reservoir thickness, the lower the viscosity, the higher the permeability, the lower the recovery degree, and the better the development effect. The mining limit is different under different oil prices, but the primary and secondary relationships affecting the multi-media auxiliary steam stimulation are the same. The primary and secondary relations are as the follows: the degree of recovery, oil layer thickness, crude oil viscosity, and permeability, which laid the foundation for mining policy research and block screening under different oil prices.