井—地电位成像技术在K区剩余油分布研究应用

发布时间：2018-08-03 19:10

【摘要】：剩余油分布研究是一项科技难题,也是地质、地球物理和油藏工程等不同领域的一直持续不断研究课题;剩余油分布研究方法很多,大类可分为宏观、微观剩余油分布研究和剩余油饱和度研究;其中测井方法研究剩余油分布的技术应用最多,测井数据对于单井信息采集很丰富全面,但是由于仪器探测范围影响,测井数据仅仅局限于井的周围较小范围;而井间的地层信息严重不足,对于后续的储层剩余油研究也带来了一定困难。井地电位测量技术越来越受到各大油公司青睐,相对其他测井方法而言它具有横向探测范围广,探测深度大和分辨率高的优点,正好解决了井间地层数据缺失的难题。井-地电位成像技术是电磁法勘探的一种,它具备井中激发与地表接收的优势,建立了井筒高分辨率测井与地表地球物理方法的联系。它既是井间储层及流体分布研究的有力工具,也是油藏综合地球物理技术的有机组成部分。本文详细介绍了井-地电位成像技术的测量原理以及利用井-地电位数据确定剩余油饱和度的方法。针对研究区储层物性较差,非均质性严重以及开发过程中注水见效程度和水驱储量控制程度低,剩余地质储量较高的问题,应用井地电位成像技术进行K区剩余油分布进行研究。通过测量K区7口井的电位数据,进行单井定性分析,同时给出研究区内沿地层走向的电阻率分布图和剩余油饱和度分布图。分析确定注水推进通道、推进方向和波及范围,并提出相应的开发调整建议。通过本次研究验证了井地电位成像技术在K区konys油田的适用性,改进了该技术的施工工艺和数据解释方法,并对该技术的先进性、局限性进行分析,对该技术的市场前景有了新的认识。井地电位成像技术对于剩余油分布的评价和注水开发方案调整效果的评价有着很好应用效果。
[Abstract]:The study of residual oil distribution is not only a scientific and technological problem, but also a continuous research topic in different fields such as geology, geophysics and reservoir engineering. The microcosmic residual oil distribution and residual oil saturation are studied, among which, logging method is the most widely used technology to study residual oil distribution, and logging data is abundant and comprehensive for single well information collection, but due to the influence of instrument detection range, The logging data is only limited to a small range around the well, and the formation information between the wells is seriously insufficient, which makes it difficult to study the remaining oil in the reservoir. Compared with other logging methods, it has the advantages of wide horizontal detection range, large detection depth and high resolution, which solves the problem of lack of cross-well formation data. Well-ground potential imaging is a kind of electromagnetic exploration technology, which has the advantages of in-well excitation and surface receiving, and establishes the relationship between wellbore high-resolution logging and surface geophysical methods. It is not only a powerful tool for studying cross-well reservoir and fluid distribution, but also an integral part of reservoir integrated geophysical technology. In this paper, the measuring principle of well-ground potential imaging and the method of determining remaining oil saturation by well-ground potential data are introduced in detail. In view of the problems of poor reservoir physical property, serious heterogeneity, low degree of water injection efficiency and low control degree of water drive reserves in the development process, the remaining geological reserves are relatively high in the study area. The distribution of residual oil in K region was studied by well-ground potential imaging technique. Through measuring the potential data of 7 wells in K area, the qualitative analysis of single well is carried out. At the same time, the distribution map of resistivity and remaining oil saturation along formation strike in the study area is given. This paper analyzes and determines the water injection propulsion channel, propulsion direction and spread range, and puts forward corresponding suggestions for development adjustment. Through this study, the applicability of well ground potential imaging technology in konys oilfield in K area is verified, the construction technology and data interpretation method of this technology are improved, and the advanced nature and limitation of this technology are analyzed. There is a new understanding of the market prospect of the technology. The well-ground potential imaging technique has a good effect on the evaluation of remaining oil distribution and the evaluation of adjustment effect of water injection development scheme.
【学位授予单位】：东北石油大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TE327

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