虎狼峁区长6注采调控技术研究

发布时间：2018-04-24 07:21

本文选题：油藏数值模拟 + 特低渗储层　；参考：《长江大学》2015年硕士论文

【摘要】：随着虎狼峁区长6油藏含油面积的逐渐扩大,开发井及扩边井的增加,地下地质条件的不断变化,在开发过程中会存在注水单向突进,含水上升快、水驱效果不理想等问题。为此,本文对于虎狼峁区长6油藏的低渗、特低渗储层的特点,通过油藏数值模拟研究、油藏工程研究技术等手段,进一步对该区进行重新的认识和研究,推出了一套适合本区的开发技术政策及注水调控技术措施。虎狼峁区位于陕西省靖边与志丹一吴旗一安塞县的境内。以靖安油田为主,东跨杨米涧和安塞油田杏河区,西跨吴旗油田东半区。从区域构造上看,本区位于陕北的斜坡中部,为一平缓的西倾单斜,地层倾角小于1度,坡降为6～8m/km,其上发育多排轴向近东西或北东-南西向的鼻状构造带。采收率是衡量油田开发水平高低的一个重要指标,而经过推导可以得出分析原油采收率的通用公式。由公式可知,有很多方面的因素诸如：井网密度f、储量系数α、渗透率k、平均单井射开厚度he、生产时间t、生产压差(Pe—Pwf—PG)、综合含水率fw、油水粘度比μR、供给半径Re、表皮系数S以及油田的开发时间等都会影响水驱开发油藏采收率,且各因素之间存在着相互联系、相互制约。这些因素是油藏地质的固有属性,是我们无法改变的,所以提高采收率主要在于调整开发技术上。而影响低渗透油田采收率的开发因素是源于多方面的,例如布井方式和井网密度、生产压差、油井工作制度、采油工艺水平和开发调整措施都会影响最终的采收率。因此我们要结合实际情况调整这些开发因素,使其达到最优化从而使采收率得到提高。通过油藏工程分析,了解到对于该区块,注水开发是恢复地层压力、提高单井产能和开发效果的关键性技术问题。而且早期注水补充地层能量对提高单井产能和开发效益具有重要作用。在注水期间我们需要调整好合适的油田开发技术,因此本文运用数值模拟的方法,截取地质建模中的一个区块,对其井底流压、注采比、采液速度进行优选。得到了该区块合理的井底流压为9MPa,合理的注采比为1.1,合理的采液速度为1.7%。研究结果表明,适当地降低井底流压,增加采液速度,并且选择合适的注采比将有利于提高产量。
[Abstract]:With the gradual expansion of oil bearing area in Chang 6 reservoir, the increase of the development wells and the expansion wells and the continuous change of underground geological conditions, there will be some problems in the process of development, such as water injection unidirectional penetration, fast rising water cut, and poor water drive effect. Reservoir numerical simulation research, reservoir engineering research technology and other means to further understand and study the area, and introduce a set of technical policies and water injection control measures suitable for this area. The tiger wolf and hilly area is located in the territory of Jingbian, Shaanxi province and the Ansai County of Wuqi, Zhidan. The area is located in the middle of the slope of Northern Shaanxi, which is a gentle westward inclined monocline, the dip angle is less than 1 degrees and the slope is 6 ~ 8m/km, and it has many rows of axial near East-West or north-east NW nose structural belts. According to the formula, there are many factors, such as well network density F, reserve coefficient alpha, permeability K, average single well ejection thickness he, production time t, production pressure difference (Pe - Pwf - PG), synthetic water content FW, oil and water viscosity ratio, Re, epidermal coefficient S. And the development time of the oil field will affect the recovery of water drive reservoir, and there are interconnections and mutual constraints among the factors. These factors are inherent properties of reservoir geology and we can not change the oil recovery. Therefore, the improvement of the recovery rate is mainly to adjust the development technology. In many aspects, such as well distribution mode and well network density, production pressure difference, oil well work system, oil production technology level and development adjustment measures will affect final recovery. Therefore, we should adjust these development factors in combination with actual conditions so that they can be optimized so that the recovery rate can be improved. Through reservoir engineering analysis, we know that For the block, water injection is the key technical problem to restore the formation pressure and improve the productivity and development effect of the single well. Moreover, the early water injection to supplement the formation energy plays an important role in improving the productivity and efficiency of the single well. In the period of water injection, we need to adjust the appropriate oil field development technology. Therefore, this paper uses the numerical simulation method. The method is to intercept a block in the geological modeling, to optimize the flow pressure at the bottom of the well, the injection production ratio, and the speed of the mining. The reasonable bottom hole flow pressure of the block is 9MPa, the reasonable injection production ratio is 1.1, the reasonable extraction speed is 1.7%., which shows that the well bottom flow pressure is properly reduced, the recovery speed is increased, and the suitable injection production ratio will be selected. It is beneficial to increase the output.

【学位授予单位】：长江大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TE357

【参考文献】