H油藏二次井网重构方案研究

发布时间：2018-04-06 03:38

本文选题：高含水　切入点：油气识别　出处：《西南石油大学》2017年硕士论文

【摘要】：随着注水开发的持续进行,我国许多油田进入高含水开发阶段。长期注水导致储层非均质程度加剧,但剩余油分布仍然有一定的规律,原有的注采井网和层系的划分已不能满足现阶段的开发需求。因此,进行高含水期井网的调整和层系的优化,对促进油田的高效开发具有重要的作用。本文针对H油藏油水分布规律不明确、注采井网不完善、含水上升快、开发区上部水淹严重等问题,以H油藏开发区为研究对象,利用大量的钻井、测井及生产动态等资料,进行油气层识别研究;在地质建模的基础上,对区块剩余油分布特征进行了研究;运用模糊数学中的模糊聚类分析方法、油藏工程方法及油藏数值模拟方法,开展了层系优化、井网调整研究,最终编制了二次井网重构方案,具体内容如下:(1)运用曲线重叠法和交会图法,对H油藏的油气层进行了重新识别,重新划分了油气界面,为储层三维精细地质建模奠定基础。(2)在对测井、地质等资料充分认识的基础上,采用相控方法建立区块三维地质模型,利用抽稀检验对地质模型进行检验,在此基础上粗化成合适的油藏数值模型。(3)完成了全区及单井的生产历史拟合工作,并在此基础上开展了剩余油分布规律研究,归纳出5种剩余油分布控制类型,为进一步井网重构提供依据。(4)利用采出程度、孔隙度、储层埋深、剩余储量丰度等参数,根据模糊聚类分析方法开展了层系优化研究。(5)针对剩余油区域及重新组合后的层系,设计了 5套后续开发调整方案,并进行了预测研究,确定了最优的调整方案。本文针对H油藏开发区含水上升较快、上部主力层水淹严重、层间矛盾突出的特点,依据目前井网适应性分析结果以及合理开采政策界限,从层系优化和井网调整两方面进行了井网重构研究,制定了合理的调整方案,为油藏的持续稳定开发奠定了基础。
[Abstract]:With the continuous development of water injection, many oilfields in China have entered the stage of high water cut development.The reservoir heterogeneity is aggravated by water injection for a long time, but the distribution of remaining oil is still regular. The original injection-production pattern and the division of strata can not meet the development demand at the present stage.Therefore, the adjustment of well pattern and the optimization of layer system in high water cut stage play an important role in promoting the high efficiency development of oil field.In this paper, the oil and water distribution in H reservoir is not clear, the injection-production well pattern is not perfect, the water cut rises quickly, and the upper part of the development zone is flooded seriously. Taking H reservoir development zone as the research object, a large amount of drilling, well logging and production performance data are used.On the basis of geological modeling, the distribution characteristics of remaining oil in blocks are studied, and the layer system optimization is carried out by using fuzzy cluster analysis method, reservoir engineering method and reservoir numerical simulation method in fuzzy mathematics.After studying the adjustment of well pattern, a reconstruction scheme of secondary well pattern is worked out. The concrete contents are as follows: (1) by using curve overlap method and cross plot method, the oil and gas reservoirs in H reservoir are re-identified and the oil-gas interface is redivided.On the basis of full understanding of logging and geological data, the block 3D geological model is established by phase control method, and the geological model is tested by pumping test.On the basis of this, a suitable reservoir numerical model of coarsening is developed. The production history fitting work of the whole area and the single well is completed. On this basis, the distribution law of residual oil is studied, and five kinds of residual oil distribution control types are concluded.For further well pattern reconstruction, using the parameters such as recovery degree, porosity, buried depth of reservoir, abundance of remaining reserves and so on, according to fuzzy cluster analysis method, the optimization study of strata is carried out.Five sets of adjustment schemes for subsequent development were designed, and the optimal adjustment scheme was determined.In this paper, according to the characteristics of H reservoir development zone where the water content rises rapidly, the upper main layer is flooded seriously, and the contradiction between layers is prominent, according to the results of adaptability analysis of well pattern and the limits of reasonable exploitation policy at present,This paper studies well pattern reconstruction from two aspects: layer system optimization and well pattern adjustment, and formulates reasonable adjustment scheme, which lays a foundation for sustainable and stable reservoir development.
【学位授予单位】：西南石油大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TE324

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