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Chang 6 oil-layer in Huaqing district of Changqing oilfield is a typical thick oil layer with ultra-low permeability. After 2 years' water flooding development, some of the production wells have been flooded with low oil recovery. Based on the geological model of Huaqing district, the ideal numerical models are established using the nonlinear flow numerical simulation software. Then the characteristics...
Oil-in-water emulsions are important in the petroleum industry as a displacing fluid for enhanced oil recovery. In the present study commercially available gear oil was used to prepare oil-in-water emulsions. Characterizations of the emulsions were performed with respect to their physicochemical properties and size distribution of the dispersed oil droplet in water phase. Experiments were also carried...
The heterogeneity of type II oil reservoir is serious, which decides the phenomenon that water and polymer coexist inevitably in the same cell in the process of polymer injection in type II oil reservoir, so that the polymer flooding potential is difficult to play. Two major kinds connected relations are found out through counting the major connected relations in polymer flooding regions of type II...
The lab experiment with different water-wash natural cores for polymer flooding adaptability is established based on coring interpretation data of xing12-3-jian3222 well of Pu I3 layer in Daqing oil field. The water displacement efficiency of the cores are 70~80%, 40~50% and 10~20% respectively. Besides, feasibility of reducing residual oil after water flooding with the high concentrated and high...
The full measuring range and real-time on-line measurement are new requirements for measuring the water content of the crude oil in oil pipeline with the application of the water flooding technique. The ultra short wave method made best use of the relationship between the ultra short wave transmission property in the crude oil medium including the amplitude attenuation and phase difference and the...
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