新型耐高温油井水泥缓凝剂的研制

发布时间：2018-06-30 05:05

本文选题：高温缓凝剂 + 油井水泥外加剂　；参考：《天津大学》2013年硕士论文

【摘要】：随着油气易采、可采储量逐渐减少，油气田勘探开发已向深井、超深井和复杂井等方向发展，目的层地质条件的复杂性给固井工程带来了许多困难和挑战。其中，高温水泥浆技术在固井工程中起到非常重要的作用；随着井底温度和压力的不断提高，需在水泥浆体系中加入一定量的缓凝剂以调节水泥浆的稠化性能，确保固井施工安全。目前，，国内的缓凝剂仍存在一定的缺陷，如适用温度范围窄、高温缓凝性差、稀释性强、易引起水泥浆异常凝胶等现象，给固井作业带来不便。本文针对油井水泥缓凝剂存在的上述问题，把聚合物高分子的分子作用机理与油井水泥水化过程紧密联系起来，在已有聚合物类缓凝剂的基础上，以AMPS(2-丙烯酰胺基-2-甲基丙磺酸)为主链、羧酸类官能团为主要缓凝基团，引入新型的聚合单体，采用自由基水溶液聚合方法，通过正交实验及各聚合物综合性能的对比研究，经过大量的室内合成实验和性能评价，优选出最佳的聚合物配方及合成工艺，研制了一种综合性能良好的耐高温缓凝剂，代号为GWH-300L。本文对高温缓凝剂GWH-300L进行了分子结构、耐温性能表征及水泥浆综合性能评价。IR谱图结果表明，所有聚合单体均参与了共聚反应；DSC和TG测试结果表明，该聚合物具有良好的耐温性能（266℃以前不会发生明显的热量和质量的损失）。综合性能评价结果表明，缓凝剂GWH-300L性能稳定，适用温度范围广，在70-200℃范围内可有效调节水泥浆的稠化时间；与其它油井水泥外加剂具有良好的配伍性和相容性，对不同油井水泥有较强的适应性；含缓凝剂GWH-300L的水泥浆体系具有良好的综合性能，如强度发展较快，大温差下顶部水泥浆不会出现超缓凝或长期不凝的现象，且可满足温差为60-130℃的固井需求；并且适用于高密度、常规密度和低密度水泥浆固井作业，能够满足高温深井、超深井、大温差及长封固段固井的施工要求，具有良好的应用前景。
[Abstract]:With the easy recovery of oil and gas, the recoverable reserves are gradually reduced, and the exploration and development of oil and gas fields have developed into deep wells, ultra deep wells and complex wells. The complexity of the geological conditions of the target layer has brought many difficulties and challenges to the cementing engineering. It is necessary to add a certain amount of Retarder in cement slurry to adjust the thickening property of cement slurry and ensure the safety of cementing construction. At present, there are still some defects in domestic retarder, such as the narrow application of temperature, poor retarding at high temperature, strong dilution, easy to lead to abnormal gelatin and so on. Then.
In this paper, the molecular mechanism of polymer polymer is closely linked with the hydration process of oil well cement. On the basis of the existing polymer retarder, AMPS (2- acrylamide -2- methyl propane sulfonic acid) is the main chain and carboxylic acid group is the main retarding group on the basis of the existing polymer retarder. Using the method of free radical water solution polymerization, through the orthogonal experiment and the comparative study of the comprehensive properties of each polymer, the best polymer formula and synthesis process are selected through a large number of indoor synthetic experiments and performance evaluation. A kind of high temperature retarder with good comprehensive performance is developed, which is named GWH-300L..
In this paper, the molecular structure of the high temperature retarder GWH-300L, the characterization of temperature resistance and the comprehensive performance evaluation of cement paste.IR spectra show that all polymerization monomers are involved in the copolymerization. The results of DSC and TG test show that the polymer has good temperature resistance (no obvious loss of heat and mass before 266 C). The performance evaluation results show that the retarder GWH-300L has a stable performance and a wide range of suitable temperature range. It can effectively regulate the thickening time of cement slurry in the range of 70-200 C; it has good compatibility and compatibility with other oil well cement admixtures, and has strong adaptability to different oil well cement. The cement slurry system containing retarder GWH-300L has a good adaptability. Good comprehensive performance, such as the rapid development of strength, the top cement slurry at the top of the large temperature difference will not be super slow or long-term non coagulating, and can meet the cementing demand of 60-130 C, and is suitable for high density, conventional density and low density cement slurry cementing operation, which can fill high temperature deep well, ultra deep well, large temperature difference and long sealing section. The construction requirements of the well have a good application prospect.
【学位授予单位】：天津大学
【学位级别】：硕士
【学位授予年份】：2013
【分类号】：TQ172.75

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