北断块油藏注干气驱室内评价研究

应用王新10-2井地面分离器油气样按气油比21.36 m3/t进行配样,并用王四斜10-3井的天然岩心进行了长岩心实验测试,研究岩心平放和岩心倾斜50°时水驱后注干气的驱油效率.研究表明,在水驱的基础上,王场潜三段北断块在注入相同体积的干气时,岩心倾斜50°放置的采收率大于岩心平放的采收率.岩心平放时水驱后干气驱替提高采收率5.01%;岩心倾斜50°时水驱后干气驱替提高采收率8.41%.这说明岩心倾斜时注干气驱替效果更明显,获得的采收率更高.

Lab Research of Dry Gas Injiection in North Fault-Block Reservior

Using synthetic fluids of separate oil and gas samples from Wangxin-10-2 well compounded according to gas oil ratio 21.36m~3/t, flooding experiments have been conducted upon long real formation core from Wangsixie-10-3 well to research flooding efficiencies by dry gas injection. The experiments have been done under two cases: the core is horizontal and the core has 50 degree's angle of inclination. Results show that the recovery with the core having 50 degree's angle of inclination is higher than that with the core horizontal when the same volume of dry gas are injected after water flooding in north fault-block of Wangchang oil field. The recovery enhanced by dry gas injection after water flooding is 5.01% when the core is horizontal; while it is 8.41% when the core has 50 degree's angle of inclination. It is also demonstrated that the displacement efficiency by dry gas injection with the core inclination is more obvious, and the enhanced recovery is higher.