F油田XX区块水驱精细挖潜及化学驱方式优选研究

发布时间：2018-06-28 14:07

本文选题：精细水驱 + 化学驱　；参考：《东北石油大学》2015年硕士论文

【摘要】：F油田大部分区块已进入水驱三次调整后的降产阶段,采收率相对较低,而进一步提高水驱采收率难度大,注水开发无法实现长期稳产,各种井网调整无明显效果,为进一步探索F油田二次开发新思路,选择了XX区块作为二三结合试验区,通过数值模拟的方法优选出精细水驱和化学驱的注采参数,对整个油田后续开发具有重要意义。本次研究采用层序地层划分对比方法,对研究区进行逐井逐层精细对比,划分到单砂体级别;充分利用前期研究成果,依据已有井的资料精细描述各个沉积单元展布特征,定量刻画储层分布规律;分平面、层间和层内三个层次研究储层非均质性;在测井综合解释的基础上,分析总结油气水分布规律。采用多级相控地质建模方法,实现单砂体级精细地质模型建立;通过变差函数分析,建立储层参数模型,精细刻画储层参数分布;在三维模型基础上,根据现有有效厚度识别标准,计算研究区地质储量,并与原始储量对比。通过动静态资料相结合,采用数值模拟软件(ECLIPSE),导出地质模型参数,建立目标区地质模型;开展目标区的历史拟合研究,修正地质模型;基于修正后的数值模型,分析目标区剩余油分布规律;结合前期基础地质和剩余油分布规律研究成果,利用数值模拟软件,开展扶余油层4个砂组精细水驱层系组合优化研究,实现水驱开发效益最大化;采用数值模拟方法,开展试验区精细水驱合理层系组合方式下的注采参数优化研究;优化参数包括注入量、注入速度、合理注采比、压力保持水平、合理产液强度水驱波及程度以及剩余油动用特征等;在试验区水驱开发指标预测基础上,开展精细水驱经济评价研究,评价方案的经济效益。通过开展对国内调剖调驱配方体系、有效化学驱配方的前沿现状调研,为化学驱优化设计奠定基础;利用数值模拟软件,开展试验区水驱转为化学驱时机的优化研究,评价指标包括累产液、累产油、含水率、采收率等;考虑储层特点和流体特征,结合研究区静动态资料,评价不同注入层位的累产液、累产油、采收率等指标,确定最优的化学驱层位和化学驱体系;调剖段塞优化设计研究;在前期精细地质研究和剩余油分布规律研究基础上,优化调剖体系与段塞,并提供建议方案,为现场实现有效封堵奠定认识基础;在优选化学驱配方体系研究基础上,开展化学驱各段塞优化设计研究。
[Abstract]:Most of the blocks in F oilfield have entered the stage of reducing production after three adjustments of water flooding, and the recovery factor is relatively low, but it is difficult to further improve the recovery factor of water drive, water injection development can not achieve long-term stable production, and the adjustment of various well patterns has no obvious effect. In order to further explore the new idea of secondary development of F oilfield, XX block is selected as the experimental area of combination of two and three. The injection and production parameters of fine water flooding and chemical flooding are selected by numerical simulation, which is of great significance for the subsequent development of the whole oilfield. In this study, the sequence stratigraphic division and correlation method is used to fine correlation well by well to single sand body level in the study area, and the distribution characteristics of each sedimentary unit are described according to the data of existing wells by making full use of the previous research results. The reservoir heterogeneity is studied at three levels: plane, interlayer and intra-layer. On the basis of comprehensive interpretation of logging, the distribution law of oil, gas and water is analyzed and summarized. Using the method of multistage facies control geological modeling, the fine geological model of single sand body is established, the reservoir parameter model is established by the analysis of variation function, and the distribution of reservoir parameters is accurately described. According to the existing effective thickness identification criteria, the geological reserves of the study area are calculated and compared with the original reserves. Through the combination of dynamic and static data, using the numerical simulation software (ECLIPSE), the geological model parameters are derived, and the geological model of the target area is established, the historical fitting of the target area is carried out, the geological model is revised, and based on the modified numerical model, The distribution of residual oil in the target area is analyzed, combined with the previous research results of basic geology and residual oil distribution, and the numerical simulation software is used to study the combination optimization of fine water drive strata of 4 sand groups in Fuyu oil formation. To realize the maximum benefit of water drive development; to use numerical simulation method to carry out the research on the optimization of injection and production parameters under the reasonable combination of fine water drive layers in the experimental area; the optimized parameters include injection rate, reasonable injection-production ratio, and pressure maintenance level, and the optimized parameters include injection volume, injection rate, reasonable injection-production ratio and pressure level. On the basis of the prediction of water drive development index in the experimental area, the economic evaluation of fine water flooding is carried out and the economic benefits of the scheme are evaluated. In order to lay a foundation for the optimization design of chemical flooding, the research on the current situation of the effective chemical flooding formulation system in China is carried out, and the optimal time of water flooding to chemical flooding in the experimental area is studied by using the numerical simulation software. The evaluation indexes include accumulative liquid, cumulative oil production, water cut, oil recovery and so on. Considering reservoir characteristics and fluid characteristics, combined with static and dynamic data of the study area, the indexes of cumulative liquid production, cumulative oil production and oil recovery of different injection layers are evaluated. To determine the optimal chemical flooding layer and chemical flooding system, to study the optimum design of profile control slug, to optimize the profile control system and slug on the basis of the preliminary fine geological study and the study of residual oil distribution law, and to provide some suggestions. On the basis of the study of chemical flooding formula system, the optimization design of chemical flooding slug is carried out.
【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】：TE357.46

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