华庆油田元284区块水平井开发效果评价

发布时间：2018-01-14 02:29

本文关键词：华庆油田元284区块水平井开发效果评价　出处：《西安石油大学》2015年硕士论文　论文类型：学位论文

【摘要】：华庆油田作为长庆油田近年来发现的几个大型整装油田之一,上报审批储量超过5亿吨。为了提高该油田长63油层的开发效益,分别采用了水平井和直井两种不同井型进行超前注水开发。由于水平井开发还处于初级阶段,如何客观的评价水平井开发效果就显得尤为重要,本文以元284区块为例来进行评价。论文针对华庆油田长63油藏细分了9个小层,确定了631为元284区块的主力层位,分别以9个小层研究了构造特征、砂体展布、储层非均质性、隔夹层等分布特征。结合元284区块的生产数据分别从生产动态、产量递减规律、油井见效特征以及含水率变化特征等方面对比分析元284区块水平井和直井开发区的不同,水平井开发区呈现递减趋势,月递减率为3.9%,而直井开发区产量保持稳定,水平井的产量是直井产量的4.82倍。此外,利用水驱规律评价元284区块水平井区开发效果,总体水驱效果较好。最后还利用数值模拟技术预测了元284区块水平井和直井两种不同井型开发的最终采收率,预测可采储量482.88×104m3与水驱曲线等方法计算可采储量相差不大,水平井采收率为10%左右。本文的研究结果对华庆油田元284区块地质特征及开发现状有了更深刻的认识,为后期开发提供了十分重要的指导意义。
[Abstract]:As one of several large integrated oil fields discovered in Changqing Oilfield in recent years, Huaqing Oilfield has reported approval reserves of more than 500 million tons. In order to improve the development benefit of Chang63 reservoir in this oilfield. Two different types of horizontal well and vertical well are adopted to develop water injection in advance. Since horizontal well development is still in the primary stage, how to objectively evaluate the development effect of horizontal well is particularly important. In this paper, Yuan284 block is taken as an example to evaluate. Aiming at Chang63 reservoir of Huaqing oilfield, 9 sub-layers are subdivided, and 631 is determined as the main layer of Yuan284 block. The structural characteristics, sand distribution, reservoir heterogeneity, intercalation and other distribution characteristics are studied in 9 sub-layers, respectively. Combined with the production data of Yuan 284 block, the production performance and production decline law are studied respectively. Comparison and Analysis on the characteristics of Oil well effectiveness and Water cut variation the horizontal well development zone in Yuan284 block is different from that in the vertical well development zone. The horizontal well development zone shows a decreasing trend with a monthly decline rate of 3.9%. The production of horizontal well is 4.82 times of that of vertical well. In addition, the development effect of horizontal well in block Yuan284 is evaluated by using the rule of water drive. Finally, the final recovery factors of horizontal well and vertical well in block Yuan284 are predicted by numerical simulation. The prediction of recoverable reserves (482.88 脳 10 ~ 4m ~ 3) is not different from that of water drive curves in calculating recoverable reserves. The oil recovery of horizontal well is about 10%. The research results of this paper have a deeper understanding of the geological characteristics and development status of Yuan284 block in Huaqing Oilfield, and provide a very important guiding significance for the later development.
【学位授予单位】：西安石油大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TE243;TE34

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