涠洲11-4N油田油藏条件下敏感性评价及保护措施研究

发布时间：2018-04-18 09:29

本文选题：涠洲区块 + 敏感性评价　；参考：《长江大学》2015年硕士论文

【摘要】：储层研究一直是油气勘探开发的重点,对于开发阶段的储层研究而言,储集空间的类型、非均质特性以及宏观与微观特征皆为储层研究开发的三大核心问题。但随着油气田开发的深入,储层敏感性研究日益成为主导采收率的重要因素,该问题使得地质开发工作者感到越来越棘手。由此储层敏感性研究日益成为开发阶段储层研究的另一核心问题。中国海油南部西部石油管理局(中海石油有限公司湛江分公司)根据涸洲11-4N油田深层砂岩储层特点,通过对该区域储层基本地质特征的研究,重点对各个层位的储层潜在损害源分析。在此基础上对贾敏和水锁效应的灰色关联度进行权重分析并筛选其中主要影响因素。探讨抑制储层水锁伤害解除方法,建立有效的水锁伤害预防管理模式。通过对涠洲11-4N油田流一段、流二段及流三段室内在高温高压下敏感性实验评价,从中得出该区域存在中等偏弱速敏及酸敏、中等偏强水敏及碱敏、贾敏和应力敏在该区块较强。研究层段在埋藏过程中处于一种富K+的碱性环境中伊/蒙混层充分发育,主要以孔隙搭桥形式产出这些因素都会引发较强水敏效应。微裂缝的普遍发育是诱发应力敏和贾敏的关键原因。根据相应研究成果提出行之有效储层保护措施。本文获得了以下主要成果：(1)通过对粘土矿物产状特征及岩心孔喉特征分析,了解它们与流体之间可能发生的各种物理和化学变化及由此造成的地层伤害。(2)利用流动性实验室评价技术,对研究区砂岩样品进行“五敏”测试并结合生产中遇到实际问题,总结该区储层的敏感性特征。该区砂岩储层敏感性伤害类型主要为水敏和速敏,其余敏感性伤害程度较低。(3)在数据处理过程后,从影响该区块的随机因子中权衡相关系数,对水锁和贾敏效应关联度及权重进行分析,优选出重要特征参数和重要影响因子。(4)储层伤害预防措施的优化,紧密联系该区块实际情况进行粘土矿物防膨处理,,为油田开发对策的制订提供重要依据。
[Abstract]:Reservoir research has always been the focus of oil and gas exploration and development. For reservoir research in the stage of development, the types of reservoir space, heterogeneous characteristics and macro and micro characteristics are the three core problems in reservoir research and development.However, with the development of oil and gas fields, the study of reservoir sensitivity is becoming an important factor leading to oil recovery, which makes geological development workers feel more and more difficult.As a result, reservoir sensitivity is becoming another core issue in reservoir development.According to the characteristics of deep sandstone reservoir in Diangzhou 11-4N oilfield, the China National Offshore Oil South Western Petroleum Administration Bureau (Zhanjiang Branch of China National Offshore Oil Co., Ltd.) has studied the basic geological characteristics of the reservoir in this area.Emphasis is placed on the analysis of potential sources of reservoir damage at each horizon.On this basis, the weight of the grey relational degree of Jia Min and the water lock effect was analyzed and the main influencing factors were screened out.This paper discusses the methods of preventing reservoir water lock damage and establishes an effective water lock damage prevention and management model.The sensitivity of the first section, the second stage and the third member of Weizhou 11-4N oil field under high temperature and high pressure is evaluated. The results show that there are moderate weak velocity sensitivity and acid sensitivity, moderate strong water sensitivity and alkali sensitivity in this area, while Jia Min and stress sensitivity are stronger in this area.The study layer segment is in a K rich alkaline environment in which the Iraq / monolayer is fully developed. These factors are mainly produced in the form of pore bypass. These factors will lead to strong water sensitivity effect.The common development of microcracks is the key cause of inducing stress sensitivity and Jia Min.According to the corresponding research results, effective reservoir protection measures are put forward.In this paper, the following main achievements are obtained: (1) based on the analysis of the characteristics of clay mineral occurrence and pore throat in the core,Aware of the various physical and chemical changes that may occur between them and the fluid and the resulting formation damage. (2) using fluidity laboratory evaluation techniques to test sandstone samples in the study area for "five sensitivities" and to meet practical problems in combination with production,The sensitivity characteristics of reservoir in this area are summarized.The sensitive damage types of sandstone reservoirs in this area are mainly water sensitivity and speed sensitivity, while the others are relatively low. After data processing, correlation coefficients are weighed from the random factors affecting the block.The correlation degree and weight of water lock and Jamin effect are analyzed, and the important characteristic parameters and important influence factor. 4) the reservoir damage prevention measures are optimized.In close connection with the actual situation of the block, the clay minerals are treated against swelling, which provides an important basis for the formulation of oilfield development countermeasures.
【学位授予单位】：长江大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TE31

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