改善稠油油藏蒸汽吞吐后期开发效果研究-2017年10月.docVIP

摘　要 稠油由于粘度高和流动性差，用常规方法很难开采。国内外自50年代投入开发以来，历经60年的开发，已经形成了以热动力为主的各种开发方式，其中蒸汽吞吐是使用范围最广泛的开发手段。但是稠油油藏经过长期蒸汽吞吐开发后，区块产量下降迅速，经济效益明显变差，使得改善开发效果技术研究成为目前急待解决的攻关课题。本文在蒸汽吞吐采油机理研究的基础上，通过对辽河油田锦45块这个典型的稠油油藏的开发现状、特点和规律的再认识，运用沉积相理论、油藏数值模拟理论、测井解释技术及动态监测等技术，开展了剩余油分布规律研究，系统的提出了改善开发效果的技术对策，并完成蒸汽吞吐油田开发阶段采收率的预测。该技术研究为我国各类稠油油藏的蒸汽吞吐开发提供了较好的技术支持和借鉴，可指导蒸汽吞吐油藏的实际开发。 关键词：稠油；蒸汽吞吐；剩余油；采收率 Abstract Heavy oil is very difficult to be produced by conventional technology because of its high viscosity and poor flow ability. From the beginning of viscous crude development in 1950s, many forms of development means mainly based on thermal dynamics have been set up. And the steam stimulation covers most developing conditions. However, after a long time of development, the yield in the block declines rapidly and economic efficiency obviously becomes poor, so it is necessary to work on improving exploitation effects of heavy oil reservoir. Based on steam stimulation oil recovery mechanism, through analyzing the developing status, characteristics and principles of three typical heavy oil reservoirs of Jin 45 Block in Liaohe oilfield, combining with sedimentary facies theory, numerical reservoir simulation theory, log interpretation and dynamic monitoring, this dissertation researches the distribution law of remaining oil, gives a systemic method improving exploitation effects, puts forward a theory forecasting oil-recovery, which can help to exploit the steam stimulation reservoirs. Key words: Heavy oil；Steam stimulation；Remaining oil；Oil-recovery 目 录 第1章 概 述 1 1.1 研究的目的和意义 1 1.2 国内外研究现状 1 1.3研究方法及内容 2 第2章 稠油油藏蒸汽吞吐的采油机理 4 2.1稠油油藏蒸汽吞吐的采油机理 4 2.2稠油油藏蒸汽吞吐采油的基本特征 5 第3章 典型油藏开发效果分析及评价 6 3.1典型稠油油藏地质特征 6 3.2典型稠油油藏开发历程 6 3.3典型稠油油藏开发现状 7 3.4典型油藏蒸汽吞吐生产特点 7 3.5典型油藏蒸汽吞吐开发效果评价 9 第4章 蒸汽吞吐剩余油分布规律研究 11 4.1蒸汽吞吐阶段剩余油分布的研究 11 4.2影响蒸汽吞吐剩余油分布的因素分析 12 4.3典型油藏动用程度研究 14 4.4典型油藏剩余油分布规律 15 第5章 改善蒸汽吞吐开发效果的研究 17 5.1提高油层平面动用程度技术界限研究 17 5.2.提高油层纵向动用程度技术界限 20 5.3提高蒸汽吞吐效果注采参数优化研究 23 5.4 改善蒸汽吞吐开发效果技术应用 28 第6章 典型区块蒸汽吞吐产量预测 29 6.1典型稠油区块采收