Nitrogen Foam Flooding Mechanism Research And Experiment

Transfer of nitrogen bubbles drive the development of non-homogeneous reservoir in the latter half of the effective means of enhanced oil recovery, in recent years carried out a series of research and field trials, but the bubble percolation mechanism, influencing factors analysis and evaluation have yet to be adaptive in-depth study, is a stage in the development of the tertiary oil recovery technology. Therefore, to further improve the transfer of nitrogen bubbles drive technology, its adaptability to system analysis, adjusted for the drive to improve the application of nitrogen level of the bubble plays an important role. Thesis of nitrogen bubbles in accordance with percolation mechanism, proposed to reflect the foaming agent foaming capacity and stability of the overall performance of the foam as the main parameters of the integrated value. Drive for the transfer of nitrogen bubbles foaming agent with the filter. Through the indoor experiments, foaming agent commonly used on the field performance evaluation, and analysis of the influencing factors. System of a gas-liquid ratio, oil saturation, the nitrogen permeability of the impact of the law of the bubble flow, results show that the oil saturation is the impact of nitrogen bubbles the most important factor in resistance to flow, foam flow resistance with the increase of oil saturation and reduce the residual oil distribution in the decision process of the transfer drive the flow of nitrogen bubble law, by the impact of the heterogeneity of the formation to increase the effect of the bubble profile is less affected.