油藏数值模拟在河流相整装油藏中的应用

Application of Reservoir Numerical Simulation in Fluvial Facies Integrated Reservoirs

【目的】利用油藏数值模拟技术计算并模拟油藏开发历程中的动态变化,通过网格内的流体流动状态及数值的计算来预测不同预案下的开发状况,以预测在不同开采方案下的油气生产情况。【方法】针对河流相整装油藏类型,采取有针对性的参数调整方法并建立动态模型,以精细油藏描述成果及三维油藏模型为基础,以油田投产以来区块全部油水井动态资料为依据进行研究。【结果】对东营坳陷东部区块开展数值模拟,并对历史动态进行精准拟合,整体含水拟合率从85.3%提升至92.7%;总结了本区块剩余油分布规律,提出4个有利开发区,增加可采储量12.3万t。【结论】油藏数值模拟方案通过对区块整体和单井的拟合,以及数据精准描述地层开发过程及储层动态变化,找到剩余油的分布位置,为制定合理的开发调整方案提供可信的科学依据。

[Purposes]This paper aims to use reservoir numerical simulation technology to calculate and simulate the dynamic changes during the development process of the reservoir,predict the development status under different plans through the calculation of fluid flow status and numerical values within the grid,and predict the oil and gas production situation under different development plans.[Methods]Tar-geted parameter adjustment methods and dynamic model establishment are adopted for the type of fluvial facies integrated oil reservoirs.Based on the results of fine reservoir description and three-dimensional reservoir model,the dynamic data of all oil and water wells in the block since the oilfield was put into op-eration are used as the basis.[Findings]This article conducted numerical simulation on the eastern block of Dongying Depression,accurately fitting historical dynamics,and increasing the overall water content fitting rate from 85.3%to 92.7%.It also summarized the distribution pattern of remaining oil in this block,proposed four favorable development zones,and increased recoverable reserves by 123000 tons.[Conclusions]Through the fitting of the whole block and single well,as well as the accurate de-scription of the formation development process and the dynamic change of the reservoir,the numerical simulation scheme of the reservoir can find the distribution position of the remaining oil and provide a credible scientific basis for formulating a reasonable development adjustment scheme.