太平油田沾5塊底水稠油油藏控水穩(wěn)油技術研究
[Abstract]:Most oil fields in China belong to continental sedimentary reservoirs with complex sedimentary conditions and great differences in physical properties. Among them, there is a special kind of hard-to-develop reservoir-heavy oil reservoir with bottom water. Due to the serious heterogeneity, active bottom water, high viscosity of formation crude oil and great difficulty in development, there is no effective development method for this kind of reservoir. One of the biggest problems in the development of bottom water heavy oil reservoir is bottom water coning. The bottom water coning causes a series of production problems, such as early water discovery, short water-free oil recovery period, rapid rise of water cut, high oil production cost and poor economic benefit. Based on the above problems, based on the research and application results of domestic and foreign bottom water reservoirs, this paper takes five block reservoirs in Taiping Oilfield as the research object, through reservoir engineering, numerical simulation method. The comprehensive research is carried out to make clear the current development situation and existing problems, to study the adaptability of horizontal well technology and artificial partition control and oil stabilization technology to five blocks, and the effect of drainage oil recovery technology to restrain water cone. At the same time, we look for other adaptive methods, such as nitrogen foam pressure cone technology. The practical measures of development adjustment are put forward to make the oil field enter a stable and efficient stage of development and obtain better economic benefits. Meanwhile, it provides reference for improving the development effect of the same kind of reservoir. By studying the effect of each technology on controlling water and stabilizing oil with 5 blocks, it is found that the production of horizontal well in this block is far more than the critical production, resulting in the rapid increase of water cut. When the bottom water coning is restrained by the use of baffle technique, the size of the separator should be between 1 / 2 to 3 / 4 of the contact area between the reservoir and the water body, and the coning of the bottom water should be delayed by reducing the velocity of liquid production. In this paper, the adaptability of drainage technology to 5 block is studied, and the optimum drainage speed and liquid production rate are obtained. Through the research and comparison of the three technologies, it can be seen that the drainage oil recovery technology has a relatively good development effect on the bottom-water reservoir of Dian-5 heavy oil.
【學位授予單位】:中國石油大學(華東)
【學位級別】:碩士
【學位授予年份】:2015
【分類號】:TE355
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