One-Dimensional Displacement of Oil by Chemical Solutions
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Water flooding
Water flooding
Tight oil
Water cut
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The hydrodynamical theory of the miscible displacement in fractured-porous media (FPM) that describes convective, gravitational, diffusive mechanisms of the recovery from blocks and hydraulic interaction between blocks and cracks is developed. The solution of the inverse problem is obtained to determine FPM properties from data from laboratory displacement.
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It is the key that choose the reasonable water flooding mode for achieving the goal of controling water cut and keeping the stable oil production in water flooding reservoir.This areticle shows the reasonable water flooding mode of low permeability sandstone reservoir which will improve waterflood efficiency,supply reservoir pressure,slow decline of oil and develop the oilfield effectively,by taking measures such as reservoir engineering,numerical reservoir simulation and dynamic analysis,researching on water injection timing,water flooding mode,water injection intensity,separated-zone water flooding and so on in Luo 1 area which is a low permeability sandstone reservoir.
Water flooding
Water cut
Oil in place
Reservoir Simulation
Petroleum reservoir
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The formula systems of profile control and oil displacement have been screened according to reservoir characteristics, oil property and injected water quality of Hai 1 heavy oil reservoir developed by water flooding. The influencing factors of gel performance are evaluated. Field tests have been performed for typical well groups to adjust the formula system and injection process according to practical production conditions by following the principle of reducing risk and ensuring success. Comprehensive evaluation has been made for the effect of profile control and oil displacement, the improvement of water well conditions, and the effectiveness of water injection, etc., by using EOR theory and empirical equations as well as dynamic and static data. The result shows that the producing degree and the recovery factor of water flooding have increased after profile control and oil displacement. This study provides reference to converting oilfield development strategy and improving oil recovery.
Water flooding
Water cut
Oil well
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In order to realize the effective water injection development of oilfield reservoirs, large-scale fracturing technology was introduced. The simulation confirmed that the large-scale fracturing well has the characteristics of high initial production, fast water injection effect, and rapid water cut rise after the effect., the research results show that compared with elastic development, water injection development can solve the problem of rapid formation energy depletion, and at the same time increase the reservoir producing area and displacement time. The final water content of water injection huff and puff is about 25% lower than that of conventional water injection, and advanced water injection can increase the production of conventional elastic development by about 30% in the early stage. It can be seen that these two new development methods are conducive to suppressing water flooding and improving oil recovery.
Water flooding
Water cut
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Using water flooding technology in intermediate zone,minute-fracture pressure water injection and profile control etc.technique carry out rational water flooding,can reach the goal of systematical development heterogeneous reservoir and make degree of water-drive and oil displacement efficiency of low ooze layer improve,formation pressure and productivity of correspondnece oil well increase.Through field application of the water injection oil displacement technique in Qiaokou Oilfield,the results show that the technology can slow down effectively natural lapse of oilfield and keep stable production and high production of oilfield.
Water flooding
Water cut
Oil Production
Steam injection
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Imbibition
Water flooding
Tight oil
Water cut
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Abstract During the development of oilfields, we usually study reservoir water injection and water injection well fracturing as two important measures to improve the effect of water flooding. These two technologies play a big role in oilfield development, but there are also some problems in the application process. In this paper, through the analysis of the fracturing mechanism and problems of reservoir water injection and water injection wells, the adjustment method of reservoir water injection and water well fracturing is proposed, which reduces the water injection pressure technology of high pressure water injection well and improves the oilfield development effect.
Water flooding
Injection well
Water cut
Produced water
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