牛74块储层特征与油水分布规律研究

发布时间：2018-06-13 03:19

本文选题：牛74块 + 储层特征　；参考：《东北石油大学》2015年硕士论文

【摘要】：牛74块沙二段储层物性较差,受储层发育和物性等因素影响,断块产量递减速度及含水上升速度均有明显加快。为改善此种低渗透油藏开发效果,提高采收率,需进一步对储层特征和油水分布规律开展细致研究。本论文通过对测井、岩心分析、试油、地震及沉积相资料进行分析研究,重新建立沙二段油层孔、渗、饱、泥解释模型,完成了对研究区44口井孔、渗、饱、泥的重新计算,通过逐步判别分析、油水判别图版及常规测井曲线分析方法的综合应用完成了研究区44口井油、水层的重新识别,油水层判别符合率达92.86%,判别图版精度达85%。在测井解释、地震解释及沉积相研究基础上应用Petrel软件完成研究区目的层三维可视化地质建模,结果符合地质规律,可更直观的对储层物性空间分布特征开展研究。利用已有开发动态资料,结合油水层识别结果,分析了研究区油水层平面及剖面分布规律。研究表明,油水分布主要受构造因素控制,其次为储层分布影响,整体上属于岩性-构造油气藏,没有统一的油水界面。最终完成储量计算,计算石油储量436.4×104t,较最新上报地质储量459.1×104t减少了22.7×104t。
[Abstract]:The reservoir physical properties of the second member of sand in block Niu 74 are poor, and due to the influence of reservoir development and physical properties, the production decline rate and the water cut rise rate of fault block are obviously accelerated. In order to improve the development effect and oil recovery of this kind of low permeability reservoir, it is necessary to further study the reservoir characteristics and the distribution of oil and water. Based on the analysis of logging, core analysis, oil testing, seismic and sedimentary facies data, the model of reservoir pore, permeability, saturation and mud interpretation in the second stage of Shahejie formation has been re-established, and the recalculations of 44 wells in the study area have been completed. Through the comprehensive application of stepwise discriminant analysis, oil-water discriminant chart and conventional logging curve analysis method, 44 wells in the study area have been re-recognized. The coincidence rate of oil-water layer discrimination is 92.86 and the accuracy of discriminating chart is 85. On the basis of log interpretation, seismic interpretation and sedimentary facies research, Petrel software is used to complete 3D visual geological modeling of the target layer in the study area. The results accord with the geological rules and can be more intuitively used to study the spatial distribution characteristics of reservoir physical properties. Based on the existing development dynamic data and the recognition results of oil-water layers, the distribution law of oil-water layer plane and profile in the study area is analyzed. The results show that the distribution of oil and water is mainly controlled by structural factors, followed by reservoir distribution, which belongs to lithologic and structural reservoirs as a whole, and there is no unified oil-water interface. Finally, the reserves are calculated at 436.4 脳 10 ~ 4 t, which is 22.7 脳 10 ~ (4) t less than the newly reported 459.1 脳 10 ~ (4) t geological reserves.
【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】：TE348

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