冀83分层注水技术与应用.docVIP

摘 要 随着油田开发的进一步深入，细分注水单元，补充地层能量，力争各层位均发挥出最佳的开发水平是保证油田长期稳产的重要因素。而油田冀83三叠系油藏的特点是各层启动压力梯度差异大，剖面非均质性严重，多段动用注水井剖面矛盾较大，部分油层段得不到能量补充，注水效果差，必须采取有效的分层注水措施。在分析油田注水开发存在主要问题的基础上，结合现有的注水工艺技术，研究了分层注水工艺技术，进行了分层注水管柱设计，探讨了投捞测试工艺技术。在L133区块、LHM区块、WLM区块都取得了明显的效果，地层能量稳步回升，一年内地层压力上升1MPa以上；吸水剖面得到了改善，水驱动用程度提高了近40％；油井见效快，平均单井增油0.59吨。 关键词：分层注水、技术、效果评价 Abstract With the further development of the oilfield，the breakdown of the Water injection unit，to add formation energy,and to strive for each layer to play the best level of development are all important factor for long-term stable development of the oilfield.The ji一83 layer of Triassic reservoir in the Jibei Oilfield is characterized by a large startup pressure-gradient difference,obvious profile heterogeneity,larger profile inconsistency of used multi-segment injection wells，not enough energy to add to the reservoir and poor water injection results．Effective separate—layer water injection must be taken．On the basis of the main exploitation problems of Jibei oilfield，separated—layer water injection technologies are studied，separated layer water injection tubings ale designed，running and pulling test technologies are developed．L133 block,LHM block and WLM block have achieved remarkable results: a steady pickup information energy,the formation pressure rising more than 1MPa；injection profile has improved，and water-driven has increased nearly 40％；oil well has fast effect with single well increasing by an average of 0.59 tons oil． Key words：Separated-layer water injection ,Technology ,Effect evaluation 目录 第1章绪论 1 1．1国内外现状 1 1．2油田开发历程 2 1．3注水开发主要问题与地质构造 3 1．3．1沉积特征 5 1．3．2储层特征 6 1．3．3裂缝特征 9 1．3．4流体性质 10 1．4本文主要研究内容及研究思路 11 第2章分层注水工艺技术 12 2．1分层注水管柱设计 12 2．1．1分层注水管柱结构 12 2．1．2分层注水封隔器 19 2．1．3分层配水器 21 2．2投捞测试工艺 26 2．2．2测试工艺 26 2. 3分层配水嘴的选择与调配 31 2．3．1水嘴的选择方法 31 2．3．2分层配水嘴调配 34 第3章分层注水效果分析 35 3．1油藏能量上升 35 3．2油藏开发形势好转 35 3．3吸水剖面得到改善 36 3．4油井注水见效效果明显 37 第4章两级三段分注工艺技术 38 4．1管柱结构 38 4．2施工工艺 38 4．3技术指标 38 4．4液力助捞调配技术 40 4．5配套工具及工艺原理 41 4．6分层测试、调配工艺技术