延长油田空气泡沫复合驱提高采收技术研究

Research on Composite Air Foam Flooding for Enhanced Oil Recovery in Yanchang Oilfield

针对延长油田地层压力低、渗透率低、产能低、水窜、水淹严重、地层能量得不到有效补充等问题,开展了空气泡沫驱技术研究及先导试验。在室内研制出了适用于延长油藏性质的复合空气泡沫体系配方,分析评价了复合泡沫体系性能指标。在甘谷驿唐80井区开展了2口井的空气泡沫驱试验,平均月增油104t,增油效果明显。室内研究和现场试验表明,空气泡沫复合驱可有效改善低渗透油藏开发效果,是进一步提高低渗透油藏采收率的有效手段。

In response to the challenges of low formation pressure,low permeability,low productivity,water channeling,severe water flooding,and ineffective energy supplementation in the Yanchang Oilfield,research and pilot tests on air foam flooding technology were conducted.A composite air foam system suitable for the properties of Yanchang reservoirs was developed in the laboratory,and the performance indicators of the composite foam system were analyzed and evaluated.Air foam flooding tests were conducted in the Tang80 well block in Ganguyi,achieving an average monthly oil increase of 104 tons,demonstrating significant oil recovery enhancement.Both laboratory research and field experiments indicate that composite air foam flooding can effectively improve the development efficiency of low-permeability reservoirs,which may serve as an effective means to further increase the recovery rate of low-permeability reservoirs.