东河1JⅢ带凝析气顶稠油油藏合理注气开发方式研究

发布时间：2018-06-28 10:13

本文选题：气顶稠油油藏 + 开发效果评价　；参考：《西南石油大学》2015年硕士论文

【摘要】：随着石油资源的日益紧张,人们越来越重视特殊油藏的开发。热采作为一种常规的稠油油藏开发手段已不能满足目前开发需要。深层、超深层稠油油藏的开发是摆在石油工作者面前的一道难题。由于油藏埋藏深,注蒸汽井筒热损失严重,注入压力要求高,热采不适合此类稠油油藏的开发,许多油田正在尝试注气开发此类油藏,一方面注入的气体在一定的压力下可以溶于原油中,有较好的降黏作用和体积膨胀作用；另一方面随着含气饱和度增加,可降低油藏油水界面张力,溶于原油中的气体有一定的溶解气驱作用。因此,研究注气提高稠油油藏采收率有十分重要的经济意义和现实意义。东河1JⅢ带凝析气顶稠油油藏储层物性差,下部稠油黏度大,气顶收缩太快,单井产能下降快,导致油气互窜,生产井含水率均处于中高含水以上,采出程度低。本文在调研国内外油田注气开发的基础上,分析了不同注入气介质的驱油机理,并详细分析了油气接触过程中流体性质的变化。在完成室内实验拟合的基础上建立了东河1JⅢ油藏八组分井组模型,分别研究了不同注入介质(CO2、N2、烃气)和注采工艺参数(注采层位、注采井型、注采井距等)对注气开发效果的影响,采用正交分析的方法比较不同注入介质、不同注采工艺参数下的产油量、含水率、最终采收率等主要生产指标,结合油藏目前实际生产情况和剩余油分布的特点设计了三套东河1JⅢ油藏注气开发调整对策,用数值模拟的方法对各方案进行计算对比,并结合经济评价对各方案进行了优选。
[Abstract]:With the increasing tension of oil resources, people pay more and more attention to the development of special reservoirs. Thermal recovery as a conventional heavy oil reservoir development means can not meet the needs of current development. Deep deep, deep heavy oil reservoir development is a difficult problem in front of oil workers. The injection pressure is high and the thermal recovery is not suitable for the development of this kind of heavy oil reservoir. In many fields, gas injection is being tried to develop such reservoirs. On the one hand, the injected gas can be dissolved in crude oil under certain pressure. It has good viscosity reduction and volume expansion. On the other hand, with the increase of gas saturation, the oil and water interface can be reduced. The gas dissolving in crude oil has a certain dissolving gas drive. Therefore, it is of great economic and practical significance to study gas injection to improve the recovery of heavy oil reservoir.
In the Donghe 1J III condensate gas top heavy oil reservoir, the reservoir property is poor, the lower heavy oil viscosity is large, the gas top contract is too fast, the single well productivity decreases rapidly, resulting in the oil and gas channeling, the water cut in the production well is in the middle and high water cut, and the recovery is low. On the basis of the investigation of gas injection development at home and abroad, the oil displacement mechanism of different injection gas media is analyzed in this paper. The change of fluid properties in the process of oil and gas contact is analyzed in detail. On the basis of fitting the laboratory experiment, the eight component well group model of Donghe 1J III reservoir is set up, and the influence of different injection medium (CO2, N2, hydrocarbon gas) and injection production process parameters (injection production layer, injection production well type, injection production well distance, etc.) on gas injection development effect are studied. The method of orthogonal analysis is compared with different injection medium, oil production, water content and final recovery under different injection and production parameters. According to the current actual production situation and the characteristics of remaining oil distribution, three sets of adjustment countermeasures for gas injection development of Donghe 1J III reservoir are designed, and the schemes are calculated by numerical simulation method. Comparison and combination of economic evaluation are used to optimize each scheme.
【学位授予单位】：西南石油大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TE357.7

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