长岩心注天然气驱油物理模拟实验

Experiment on physical modeling of displacement oil with natural gas for long core

根据室内实验验证天然气驱油是否适合冀东油田,并评价其效果。根据冀东油田的地层特征,配置地层原油和地层水,根据油藏的渗透率优选岩心,根据岩心排列规律,排成一长岩心,在美国产CFS-100多功能综合驱替系统中,分别进行水驱、气水交替驱、气驱3种驱替实验,并对实验结果进行分析和评价。实验结果表明:水驱采出程度最低,气水1∶3交替驱采出程度最高。注入的气体体积越大,越有利于提高驱油效率。

According to the lab experiments, the suitability of displacement oil with natural gas in Jidong Oilfield is verified and its effectiveness is evaluated. In accordance with the reservoir characteristics of Jidong Oilfield, the crude oil and formation water are allocated. The core is selected according to the reservoir permeability. Based on the law of core ordering, a long core is lined up. Using the CFS-100 multi-function integrated system made in USA for the drive, water flooding, water-gas alternating drive and gas drive experiments are respectively done. The results are analyzed and evaluated. The recovery level of water flooding oil is the lowest. When the gas and water are 1：3, the level of alternating flooding is the highest. The larger injection gas volume is, the more help for the oil displacement efficiency there will be.