太平油田沾5块底水稠油油藏控水稳油技术研究

发布时间：2019-02-22 09:30

【摘要】：我国油田大多属于陆相沉积油藏,沉积条件复杂,物性差异较大。其中,有一类特殊的难开发油藏----底水稠油油藏。该类油藏由于非均质性严重、底水活跃、地层原油粘度较高,开发难度大,目前尚无有效开发方式可借鉴。底水稠油油藏开发所面临的一个最大问题就是底水锥进。底水锥进引起了油井见水早、无水采油期短、含水上升快、采油成本高、经济效益差等一系列的生产问题。基于上述问题,本文在参考国内外底水油藏已经取得的开发技术研究及应用成果的基础上,以太平油田沾5块油藏为研究对象,通过油藏工程、数值模拟方法,对其开展综合研究,弄清目前的开发状况及存在的问题,研究水平井技术和人工隔板控水稳油技术对于沾5块的适应性,以及排水采油技术抑制水锥的效果。并同时寻找其他适应性方法,如注氮气泡沫压水锥技术。提出切实可行的开发调整措施,最终使油田进入一个稳定、高效的开发阶段,获得较好的经济效益,同时为同类油藏改善开发效果提供借鉴。通过研究各技术对于沾5块的控水稳油效果,发现该区块水平井的产量远超过临界产量,致使含水快速增大;当运用打隔板技术抑制底水锥进时,隔板大小应介于油藏与水体接触面积的1/2到3/4之间,且应通过降低产液速度来延缓底水的锥进;研究排水采油技术对于沾5块的适应性并得到了最佳排水速度以及最佳产液速度。经过对三种技术的研究对比可知,排水采油技术对沾5稠油底水油藏的开发效果相对较好。
[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.
【学位授予单位】：中国石油大学(华东)
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TE355

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