【作者】 秦亮；

【导师】 夏惠芬；

【作者基本信息】 东北石油大学 ， 油气田开发工程， 2011， 硕士

【摘要】 北二西东部区块已经进入了高含水中后期,综合含水率高达85%以上。由于含水率的升高,使得油田的开发难度越来越大。在注水开发后期,影响开发效果的因素十分突出,为了使油藏开发能在最佳的状态下进行,从多种油藏工程方法中选择出适合研究区块注水开发后期开采特征的方法。对注水开发油田的水驱开发效果进行科学的评价,对于进一步搞好油藏注水开发,为实施调整措施提供可靠依据以及提高油藏最终采收率都具有十分重要的意义。本文以北二西东部区块实际生产动态资料为基础,通过统计回归分析确定了该区块水驱规律曲线类型和产量递减规律,结合水驱规律曲线和产量递减规律建立了含水率、产油量的预测方程。结合层次分析原理、模糊综合评判法和油藏工程等方法,对北二西东块水驱开发效果进行评价。运用logistic旋回模型,建立注水量与产油量的关系方程,进而得到不同含水率条件下合理的注采比以及注水速度与采油速度的关系曲线。针对北二西东区块的实际开发情况,建立了注采比、产液量以及总压差的关系方程,通过分析得到该区块目前开发的合理地层压力。其结果为油藏开发调整方案的制定提供了可靠依据,对油田产量提高具有十分重要的指导意义。更多还原

【Abstract】 Eastern block of beierxi is at the later stage of high water-cut, having the water-cut up to 85%. Rising of water-cut makes the development of oilfield more and more difficult. At the later stage of water flooding, various problems influencing development effect are especially obvious, in order to make reservoir development in the best conditions, some reservoir engineering methods have been selected to analyze the production features at the later stage of water-injection. Evaluating the water flooding development effect scientifically is of great importance to deepen the water flooding and offer reliable reference of carrying out the measures of exploring the potential reserves as well as increase the oil recovery.Based on the actual production performance data of eastern block of beierxi, this paper determines the water flooding law curve and the production decline law of the block through statistical regression, and establishes prediction equation of water-cut and oil production. With the principle of hierarchy analysis, the methods of fuzzy comprehensive and oil reservoir engineering, the development effect of the block is evaluated. Through the logistic cyclothem, the equation of water injection and oil production is established. The reasonable injection production rate under the conditions of different water-cut and the curve of water injection rate and oil production are obtained. By establishing the equation of injection production rate, liquid production and total pressure difference, the reasonable formation pressure recently is obtained. Researching the adjusting boundaries of the technological limits has most guiding significance for the adjustment of the exploitation plan, which provide reliable basis for designing adjusting plan of reservoir exploitation.更多还原