《提高油气井固井水泥环韧性的研究》-毕业论文（设计）.doc

精品 PAGE 精品 摘　要 本文根据大庆油田目前的开发要求和现场工程实际，阐述了进行射孔对水泥环损伤研究的必要性。同时，在国内首家提出了用动态力学的方法，测量水泥石的动态力学性能，这对分析射孔对水泥环的影响具有重要的指导作用，开辟了固井基础理论研究的新领域。根据固井水泥环受聚能射孔冲击后局部产生破裂的现象，分析了射孔过程中水泥环破裂的原因。借助于“Hopkinson”多功能材料动态力学性能测试装置和射孔综合模拟实验装置等一系列实验就射孔对水泥环的损伤进行了综合实验研究。同时，提出了评价水泥石抗冲击韧性的代表参数及临界值，并以此进行了水泥石改性的外加剂实验研究，给出了满足射孔冲击的水泥石的临界力学指标，研制出了DRK抗冲击韧性水泥外加剂体系。上述研究成果不仅具有一定的理论价值，而且对提高固井质量，延长油井寿命，增加油井产能具有重要的实际意义和推广应用价值 关键词：水泥石 聚能射孔 韧性 外加剂 Abstract According to the demand of actual cementing job sand development in Daqing oil this paper deseribes the necessities of researehes on cement sheath damage caused by perforation.At same time，the dynamic mechanics method is posed firstly in China to measurethe dynamic mechanics performance of cemcnt stone.This is very important for analyzinginfluences off perforation to cement sheath.A new field of basic cementing theory researeh isopened up.On the basie of the phenomena of fracture in part cement sheath caused by highpower perforating.The reasons of fractureare analyzed.Using“HoPkinson，，device，which ismaterial dynamic mechanics measuring device，and comprehensive perforation simulationdeviee，a serial of experiments have been finished for researching of cement sheath damagecaused by perforation.The representative parameters and critieal value are raised to evaluatethe toughness of cement stone resistance to impact.Based on these，additives are researchedand tested to modify the property of cement stone，giving the critical mechanics antiunion satisfied cement stone impaeted by perforation.The additive system of impact resistancetoughness cement一DRK has been researched and manufactured. The research achievements in this paper have not only theoretical value but also the applied and developed value for improving cementing quality，extending life of oil wells aswell as enhaneing oil recovery. Key words:Cement stone High power perforation Tonghness Additive 目 录 第一章 前言………………………………………………………………………1 第二章 射孔对水泥环损伤的原因分析…………………………………………2 2.1 聚能射孔和应力波………………………