情字井地区黑46区块精细油藏描述及剩余油分布规律研究

发布时间：2018-03-20 16:39

本文选题：砂体识别　切入点：储层评价　出处：《东北石油大学》2015年硕士论文　论文类型：学位论文

【摘要】：大情字井油田黑46区块经过多年的注水开发,目前暴露出影响开发效果及稳产的问题:首先,受岩性和物性及储层非均质性影响导致水驱动用程度低。储层物性差,层间非均质严重,渗透率级差大、突进系数大、渗透率变异系数大,分层吸水极不均匀,分层动用存在较大差异,注入水沿裂缝方向突进快导致裂缝方向油井含水上升快;其次,储层及隔夹层描述不够精细。各小层间及小层内部砂体间夹有大量的隔夹层,影响了注水在层内的均匀推进,造成吸水程度差异较大,主力油层水淹严重,而非主力油层吸水差,影响了油水井的注采对应关系;最后,剩余潜力分布需进一步明确。目前已表现出综合含水率高、采出程度低等特征,如何提高开发效果、控制含水上升速度,充分挖掘潜力是油田下步工作需要解决的主要问题。针对区块存在的问题,在研究区开展小层对比、砂体识别、沉积微相研究和隔夹层精细研究的基础上,结合动态资料,对黑46区块进行动态分析,分井组研究,确定每个井组油水井之间的对应关系及砂体连通状况,分析注入水的优势渗流方向。利用三维模型,研究剩余油的分布状况和分布特点,制定详细的剩余油挖潜方案,并进行数值模拟预测,优选最佳方案,指导油藏开发。
[Abstract]:After many years of water injection development in Hei46 block of Dazhengzjing Oilfield, problems affecting the development effect and stable production are exposed. Firstly, the low water driving degree and poor reservoir physical property are caused by the influence of lithology, physical properties and reservoir heterogeneity. The heterogeneity between layers is serious, the permeability difference is large, the penetration coefficient is large, the coefficient of variation of permeability is large, the water absorption of the layers is very uneven, and there is great difference in the production of the layers. The injection water burst along the fracture direction causes the water cut of the oil well to rise rapidly in the fracture direction. Secondly, the description of reservoir and intercalation is not precise enough. A large number of interlayers are intercalated between each sublayer and between sand bodies in the sublayer, which affects the uniform advance of water injection in the layer, resulting in a great difference in the degree of water absorption and serious flooding in the main reservoir. However, the difference in water absorption in non-main reservoirs has affected the corresponding relationship between injection and production of oil and water wells. Finally, the distribution of residual potential needs to be further clarified. At present, the distribution of residual potential has shown the characteristics of high comprehensive water cut and low recovery degree, so how to improve the development effect, Controlling the water cut rising speed and fully exploiting the potential are the main problems to be solved in the next step of oilfield work. In view of the problems existing in the block, on the basis of the small layer contrast, sand body identification, sedimentary microfacies research and fine intercalation study in the study area, Based on the dynamic data, the dynamic analysis of Hei 46 block is carried out, and the well group research is carried out to determine the corresponding relationship between oil and water wells in each well group and the state of sand body connectivity, and to analyze the dominant seepage direction of injected water. This paper studies the distribution and characteristics of remaining oil, makes a detailed plan for tapping potential of remaining oil, carries out numerical simulation and prediction, and optimizes the best scheme to guide reservoir development.
【学位授予单位】：东北石油大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：P618.13;TE327

【参考文献】