M油田K95断块开发调整技术对策研究

发布时间：2018-06-30 02:53

  本文选题：储层评价 + 渗流特征　； 参考：《东北石油大学》2017年硕士论文

【摘要】：K95断块是华北油田南部区域的主力油气生产油藏,在达到产量高峰后逐渐进入高含水开发阶段,注水井注水难度大,稳产形势非常严峻。本文针对油藏开发过程中暴露的突出问题,深入分析本断块地质储层特征、流体物性以及开发历程与现状。本文进行了储层渗流特征评价,完成了储层岩石的X-射线衍射分析、敏感性评价、渗流特征评价室内实验和研究工作:7块样品的储层岩石X-衍射和粘土矿物分析实验;15块样品的储层敏感性评价(3块样品酸敏、3块样品水敏、3块样品速敏、3块样品碱敏和3块样品盐敏实验);储层渗流特征评价(7块岩样相渗实验,9块岩样水驱油实验)。储层属中低孔低渗储层,非均质性强,Ⅱ油组更加严重。储层表现为强水敏~极强水敏,强盐敏~极强盐敏,中等偏强酸敏~强酸敏,中等偏强碱敏~强碱敏特征,无速敏。相渗实验数据表明,Ⅰ油组油相渗透率随含水饱和度的增加下降较快,Ⅰ、Ⅱ油组两相渗流区较窄,储层残余油饱和度相对较高。在上述研究的基础上,开展了注采系统的适应性研究,主要包括合理注采井数比、注采比、合理井距、合理压力水平及水驱开发效果评价研究。油藏开发初期注采井网能够满足油藏开发的需要,大部分油井均见到较好的注水效果。进行了措施效果及适应性的评价,包括压裂、酸化解堵、卡堵水、注水井等措施分析,包括油井和水井的措施适应性分析。进行了剩余油潜力评价研究。经过构造精细解释与地层对比,与原构造发生变化,在K95主断块高部位、K95-2x井与K95-4x井间具有无井控制区,具备进一步钻井完善的潜力。K95断块构造复杂,经过多年的开采过程之后,地下油水关系更加复杂,后备油层少,调整挖潜难度大,目前油田处于开发中后期,应加大油藏动态监测力度,进行更为详细的地质认识,以保证油田的高效生产。通过进行储层渗流特征评价,研究储层岩石矿物敏感性对注水、酸化开发的影响,探求注采系统的适应性规律以及保障措施的效果与适应性规律,结合剩余油潜力找到合理的调整方案,相关成果通过在现场实施,达到了减缓递减、提高油藏开发的效果,有效地指导油田生产,并为同类型油藏稳产、减缓递减开发提供了借鉴。
[Abstract]:K95 fault block is the main oil and gas production reservoir in the southern region of North China Oilfield. After reaching the peak of production, it has gradually entered the stage of high water cut development, the injection well is difficult to be injected and the stable production situation is very serious. In this paper, the geological reservoir characteristics, fluid physical properties, development history and present situation of the fault block are deeply analyzed in view of the outstanding problems exposed during reservoir development. In this paper, the reservoir percolation characteristics are evaluated, and the X ray diffraction analysis and sensitivity evaluation of the reservoir rock are completed. Laboratory experiment and Research work on percolation characteristics Evaluation of reservoir sensitivity of 15 samples (3 samples, acid sensitive, 3 water sensitive) and clay mineral analysis experiment, X- diffraction of reservoir rocks and clay mineral analysis of 7 samples Alkali sensitivity and salt sensitivity of 3 samples and reservoir percolation characteristics evaluation (7 rock samples and 9 rock samples water flooding experiments). The reservoir is a low porosity and low permeability reservoir with strong heterogeneity and more serious oil group 鈪，

本文编号：2084536