热采开发技术在JQ稠油油藏的应用研究

发布时间：2018-07-03 09:27

  本文选题：稠油油藏 + 注蒸吞吐　； 参考：《东北石油大学》2017年硕士论文

【摘要】：热力采油作为目前稠油开发的主要手段,能够有效升高油层温度,降低稠油粘度,使稠油易于流动,从而将稠油采出。蒸汽吞吐是先向油井注入一定量的蒸汽,关井一段时间,待蒸汽的热能向油层扩散后,再开井生产的一种开采稠油的增产方法。蒸汽驱采油技术是将蒸汽注入到一口或多口井中,将地层中粘度较大的稠油加热降粘,然后在蒸汽蒸馏的作用下,把原油驱向邻近多口生产井中并采出来。JQ稠油油藏属于高孔、中高渗透稠油油层,研究区块的蒸汽吞吐及蒸汽驱热采开发情况具有重要意义。从JQ稠油油藏蒸汽吞吐开发实际情况得出,经过蒸汽吞吐开采,达到产油效果,油层热连通程度得到改善。但仍存在由于热损失造成蒸汽干度降低,井间干扰,油层吸汽不均等问题,需通过提高注汽的速度,减少注汽时间;组合式吞吐技术分层、选层注汽技术等,以改善蒸汽吞吐的效果。从JQ稠油油藏蒸汽吞吐后期转蒸汽驱开发的实际情况得出,为提高稠油油藏产量方面发挥了重要的作用,但油井含水上升快、蒸汽窜问题也日益突出,成为影响热采开发效果的主要问题。因此为解决该问题,通过优选耐高温调堵液,判断地层是否存在大孔道及确定大孔道封堵剂用量等措施,缓解了平面、层间矛盾,达到提高采收率的目的。
[Abstract]:Thermal recovery, as the main means of heavy oil development, can effectively raise reservoir temperature, reduce viscous oil viscosity and make heavy oil flow easily, thus heavy oil can be extracted. Steam huff and puff is a method to increase the production of heavy oil by injecting a certain amount of steam into the oil well and closing the well for a period of time after the heat energy of the steam diffuses to the reservoir and then opens the well to produce the heavy oil. Steam flooding oil recovery technology is to inject steam into one or more wells, heat and reduce viscosity of viscous heavy oil in formation, and then drive crude oil into neighboring production wells and produce. JQ heavy oil reservoir belongs to high porosity under the action of steam distillation. It is of great significance to study steam huff and puff and steam drive thermal recovery in middle and high permeability heavy oil reservoirs. From the actual situation of steam huff and puff development in JQ heavy oil reservoir, it is concluded that through steam huff and puff production, the oil production effect is achieved and the thermal connectivity degree of the reservoir is improved. However, there are still some problems such as decrease of steam dryness caused by heat loss, interwell interference, uneven absorption of steam in oil reservoir, need to increase steam injection speed to reduce steam injection time, combined huff and puff technology for stratification, selection of reservoir steam injection technology, etc. To improve the effect of steam huff and puff. From the actual situation of steam flooding in JQ heavy oil reservoir in the later stage of steam huff and puff, it is concluded that it plays an important role in improving the production of heavy oil reservoir, but the water cut of oil well rises quickly and the problem of steam channeling becomes more and more prominent. It has become the main problem that affects the development effect of thermal recovery. So in order to solve this problem, by selecting the high temperature resistant plugging fluid, judging whether there is a large pore channel and determining the amount of plugging agent, the contradiction between plane and layer can be alleviated, and the recovery efficiency can be improved.
【学位授予单位】：东北石油大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TE357.44
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本文编号：2093182