杏四~六面积北块薄差层布井方案优选

发布时间：2018-04-18 05:41

  本文选题：薄差层 + 剩余油　； 参考：《东北石油大学》2015年硕士论文

【摘要】：目前,国内大多数油田都已进入高含水期甚至特高含水期开发阶段,而采出程度相对较低,大量的剩余油还存在于地下,剩余油挖潜的潜力还很大。杏四~六面积北块非主力油层综合含水率达到93.75%,已进入特高含水期,薄差层成为水驱开发的主要对象。因此,为保证油田长期稳产,确保长远的经济及社会效益,需对薄差层提高采收率进行研究,对区块层系细化、注采开发、井网方式进行调整,并采取有效措施,优化注采系统,设计措施方案,形成薄差层综合评价技术及挖潜技术,有效动用薄差储层剩余油。本文在详细了解区块地质特点和储层特性的基础上,利用现场所给的静态地质数据建立了区域地质模型,考虑到计算机的计算能力,对地质模型进行了粗化。然后,根据现场提供的开发动态数据进行了历史拟合,拟合的主要指标包括:产液量、含水率和采出程度,拟合满足精度3%。根据数值模拟结果,分析薄差储层剩余油分布状况,确定剩余油类型,通过量化各类油层的剩余油分布,研究加密调整潜力和挖潜措施,制定布井方案,并从开发效果和经济效益两方面优选布井方案。优选结果显示:薄差储层分三套层系开采,即萨尔图好层、萨尔图差层和葡Ⅰ4组及以下油层,含水率下降了2.84%,采收率提高了5.05%,明显提高了水驱开发效果。所得成果为改善薄差储层动用程度提供借鉴。
[Abstract]:At present, most oil fields in China have entered the development stage of high water cut period or even very high water cut stage, but the degree of recovery is relatively low, a large number of remaining oil still exist in the underground, and the potential of remaining oil is still very great.The comprehensive water cut of non-main reservoirs in the North Block of Apricot 4 ~ 6 has reached 93.75%, which has entered the period of extremely high water cut, and thin and poor layers have become the main object of water drive development.Therefore, in order to ensure long-term stable production of oil fields and ensure long-term economic and social benefits, it is necessary to study the improvement of recovery factor of thin and differential layers, refine the layer system of blocks, develop injection-production, adjust the pattern of well pattern, and take effective measures.Optimization of injection-production system, design of measures, formation of comprehensive evaluation technology of thin and differential layer and tapping technology, effective use of remaining oil in thin difference reservoir.Based on the detailed understanding of the geological characteristics and reservoir characteristics of the block, a regional geological model is established by using the static geological data given in the field. Considering the computing ability of the computer, the geological model is coarsened.Then, according to the development dynamic data provided by the field, the historical fitting is carried out. The main indexes of the fitting include: liquid yield, water content and extraction degree, and the fitting meets the accuracy of 3.According to the results of numerical simulation, the distribution of remaining oil in thin difference reservoir is analyzed, and the type of remaining oil is determined. By quantifying the distribution of remaining oil in all kinds of reservoirs, the potentiality of infilling adjustment and tapping potential are studied, and the plan of well layout is worked out.And from the development effect and economic benefit two aspects of optimal selection of well layout scheme.The optimal selection results show that the thin and poor reservoir is divided into three sets of production systems, that is, the good layer of Saltu, the poor layer of Saltu and the oil layer of Group 鈪，

本文编号：1767070