II 锦 31 块大凌河油层天然气驱可行性研究 摘要 天然气驱是继水驱和聚合物驱之后又一个重要的驱动技术。国外近年来天然 气驱技术发展较快，并且随着提高采收率的实施呈不断扩大的趋势。由于我国主 要产油区的天然气气源紧张和相关设备不足等条件限制，使该技术在我国起步较 慢。但随着相关条件的逐步完善和注气技术研究的进一步提高，天然气驱也有了 很大进步，目前我国已有多个油田进行天然气驱实地实验。 本文结合国内外天然气驱开发的现状及发展趋势，分析了锦 31 块大凌河油 层目前的基本概括和开发状况，在实验室确定天然气驱最小混相压力，通过对该 油层油藏物性及提高采收率潜力和油藏构造的分析，开展注天然气驱开发适用性 研究。通过物理模拟实验测定不同开发模式的驱油效率，确定开发效果最优的驱 替方式。依据储层三维地质建模及数值模拟研究，编制锦 31 块大凌河油层天然 气驱开发方案并进行了方案优化设计。 关键词：天然气驱，最低混相压力，驱油效率，三维地质建模，油藏构造模 型，油藏数值模拟III A Feasibility Study On Natural Gas Drive In Dalinghe Reservoir Of Jin 31 Block ABSTRACT After water drive and polymer drive, Natural gas drive is another important drive technology. Foreign gas displacement technology developed rapidly in recent years, and with an expanding trend of the implementation of the improved recovery. Because of our country's main oil-producing conditions such as natural gas air tight and related equipment, making the technology in our country had a slow start. But along with the related conditions gradually improve and further improve the gas injection technology research, gas flooding also has made great progress, at present our country has multiple oilfield gas displacement field. This paper reviewed the current situation and development trend of natural gas development, analyzes the basic overview and development status of Dalinghe reservoir in block Jin 31 at present, natural gas in the laboratory to determine the minimum miscibility pressure, the oil reservoir and enhance oil recovery potential and reservoir structure analysis, carry out natural gas injection study on Applicability of flooding. The displacement efficiency of different development models was determined by physical simulation test, and the optimal displacement method was determined. Based on the simulation of 3D reservoir geological modeling and numerical flooding scheme and optimization，design of Dalinghe reservoir in block Jin 31 natural gas. Keywords: Natural gas drive, Minimum miscibility pressure, Oil displacement efficiency, 3D geological modeling, Reservoir structure model, Reservoir numerical simulation 东北石油大学工程硕士专业学位报告目 录 摘要.........................................................................................................................II ABSTRACT.................................................................................................................III 第一章 储层天然气驱适用性研究..............................................................................2 1.1 国内外天然气驱技术发展简介 ......................................................................2 1.1.1 国外天然气驱技术发展简介.................................................................2 1.1.2 国内天然气驱技术发展简介.................................................................3 1.2 锦 31 块大凌河油层天然气驱适用性分析 ...................................................4 1.2.1 油藏概括................................................................................................5 1.2.2 最低混相压力........................................................................................6 1.2.3 开发现状..............................................................................................10 第二章 天然气驱物理模拟试验................................................................................11 2.1 驱油效率物理模拟试验 ................................................................................ 11 2.2 试验过程 ........................................................................................................ 11 2.3 实验结果及分析 ............................................................................................13 第三章 储层三维地质建模........................................................................................15 3.1 建模基础资料的收集整理 ...........................................................................15 3.1.1 建模基础数据整理..............................................................................15 3.1.2 数据一体化...........................................................................................15 3.1.3 标准化操作..........................................................................................15 3.1.4 数据加载..............................................................................................16 3.2 概念模型的建立 ...........................................................................................17 3.2.1 构造概念模型......................................................................................17 3.2.2 储层概念模型......................................................................................17 3.3 三维地质建模 ...............................................................................................18 3.3.1 建模的主要技术及思路......................................................................18 3.3.2 断层模型..............................................................................................18 3.3.3 三维网格计算.......................................................................................19 3.3.4 地层框架模型......................................................................................19 3.3.5 纵向网格剖分......................................................................................20 3.3.6 储层物性模拟.......................................................................................21 3.4 储量计算 .......................................................................................................27 3.4.1 储量复算的目的及意义.......................................................................27 3.4.2 储量单元划分.......................................................................................28 3.4.3 储量参数选取及拟合结果...................................................................28 3.5 模型粗化及输出 ...........................................................................................31 3.5.1 粗化网格设计......................................................................................31 3.5.2 属性粗化..............................................................................................31 东北石油大学工程硕士专业学位报告目 录 第四章 储层天然气驱数值模拟研究........................................................................34 4.1 注入气及地层原油相态拟合 .......................................................................34 4.2 生产动态历史拟合 .......................................................................................37 4.2.1 模型选择..............................................................................................37 4.2.2 流体和岩石物性参数的确定..............................................................37 4.2.3 生产动态历史拟合..............................................................................39 4.2.4 油气藏储量拟合..................................................................................39 4.2.5 单井拟合..............................................................................................40 4.2.6 剩余油分布及动用状况......................................................................41 4.3 注气方案设计 ................................................................................................42 4.3.1 方案设计及布井原则...........................................................................42 4.3.2 井网设计...............................................................................................42 4.3.3 方案设计...............................................................................................43 4.4 方案效果预测 ................................................................................................43 4.4.1 各方案预测指标分布..........................................................................43 4.4.2 方案效果评价......................................................................................46