B油田剩余油分布与挖潜措施研究

发布时间：2018-03-23 14:17

本文选题：低渗透油藏　切入点：剩余油　出处：《西南石油大学》2015年硕士论文

【摘要】：剩余油分布及挖潜是油藏开发后期关注的重点和难点。B油藏经过近40年的开采,已经进入开发后期。到目前为止,区块的采出程度不高,仍有大量的剩余油残存在地下。搞清剩余油的分布规律并进行有效的挖潜是本区块的中心任务。本文以开发地质学、油藏工程、数值模拟等理论为基础,综合油藏静、动态资料对剩余油的分布进行研究并提出综合治理方案。首先,通过综合测井、钻井等资料,对油藏的储层特征进行再认识,并在此基础上利用随机相控建模建立了油藏三维地质模型。其次,通过对油藏生产资料的分析,开展油藏的产油、产水、注水见效特征、含水上升规律研究,预测油藏的最终采收率,并对油藏目前井网适应性进行了分析,为后期的挖潜对策提供了依据。再次,利用数值模拟方法,弄清目前剩余油的分布规律；提出了不同的挖潜方案并进行模拟预测,对比预测结果,优选最佳方案,为进一步的进行剩余油挖潜提供了技术支持。通过本文的研究,明确了B油藏的剩余油分布规律是：(1)主力层存在大量的剩余油；(2)区域内非均质性严重,导致层内存在大量的剩余油；(3)井网不完善导致了井间位置存在大量的剩余油。在了解剩余油分布的基础上,明确了剩余油挖潜思路为：(1)在平面上,钻新井或侧钻井,从平面上解决井网控制程度差的问题；(2)在纵向上,完善注水、采油井的射孔层位,解决纵向上的有注无采、或有采无注问题。最终设计的挖潜措施是在调层方案的基础上进行井网加密,能在目前开发方式的基础上,采收率提高了3.54个百分点。
[Abstract]:The distribution of remaining oil and tapping potential are the key and difficult points in reservoir development. After nearly 40 years of development, reservoir B has entered the later stage of development. Up to now, the recovery degree of the block is not high. There is still a large amount of residual oil remaining underground. It is the central task of this block to understand the distribution law of remaining oil and effectively tap potential. Based on the theories of development geology, reservoir engineering, numerical simulation and so on, this paper synthesizes reservoir static. The distribution of remaining oil was studied by dynamic data and a comprehensive treatment scheme was put forward. Firstly, through comprehensive logging and drilling data, the reservoir characteristics are re-recognized, and on this basis, the reservoir 3D geological model is established by using random phase control modeling. Secondly, through the analysis of the production materials of the reservoir, the characteristics of oil production, water production, water injection and water cut rise are studied to predict the final recovery factor of the reservoir, and the adaptability of the reservoir well pattern is analyzed. It provides the basis for the strategy of tapping potential in the later stage. Thirdly, the distribution law of remaining oil is clarified by using numerical simulation method, and different potential tapping schemes are put forward and simulated prediction is carried out, and the best scheme is selected by comparing the prediction results. It provides technical support for further exploitation of remaining oil potential. Through the research in this paper, it is clear that the distribution law of residual oil in reservoir B is that there is a large amount of residual oil in the main layer of reservoir B, and that the heterogeneity is serious in the area. The imperfect well pattern leads to the existence of a large amount of remaining oil in the cross-well position. On the basis of understanding the distribution of remaining oil, it is clear that the idea of tapping the remaining oil potential is: 1) on the plane, drilling new wells or sideways. From the plane to solve the problem of poor control degree of well pattern) in the vertical, perfect the perforation layer of water injection and production well, and solve the vertical injection without production, The final measure of tapping potential is to infill well pattern on the basis of adjustment plan, and the oil recovery can be increased by 3.54 percentage points on the basis of the present development mode.
【学位授予单位】：西南石油大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：P618.13;TE327

【参考文献】