储气库固井水泥浆体系配方研究

发布时间：2018-06-20 23:57

本文选题：储气库 + 水泥浆　；参考：《东北石油大学》2015年硕士论文

【摘要】：储气库井相对于普通注采井来说,在工作时井筒要反复承受注采气过程中所产生的交变应力作用和相应温度的变化,工程条件苛刻复杂,要求具有更长的使用年限。这就要求固井水泥环具有良好的封隔能力,在能够承受较高压力的同时具备良好的韧性。然而,常规油井水泥存在抗拉强度低,受拉变形能力小,易脆裂等缺陷,很难满足储气库固井施工要求。因此,开展储气库固井水泥浆体系配方研究,探索开发抗拉韧性油井水泥浆体系途径,对有效保障储气库井正常作业和生产具有重要意义。本文利用水泥浆流变仪、稠化仪、失水仪、万能试验机、三轴压缩试验机和扫描电子显微镜等仪器和设备,选择纤维、胶乳、碳酸钙晶须等作为水泥浆外掺料,开展了油井水泥体系性能实验检测与分析,分析了外掺配浆材料及其加量对流动度、流变性、失水量水泥浆浆体性能的影响规律,研究了配浆材料及其加量对水泥石微观结构、强度、弹性模量等的影响规律,分析了纤维等配浆材料对水泥石力学性能产生影响的作用机理,优选出了一组储气库固井水泥浆体系配方组成,评价了水泥浆体系的工程适用性及力学参数适应性,为实施储气库井固井提供了基础。
[Abstract]:Compared with common injection-production wells, gas storage wells have to endure the change of alternating stress and corresponding temperature repeatedly in the process of gas injection and production. The engineering conditions are harsh and complex, and the working life is longer. This requires that cementing cement ring has good sealing ability and good toughness while withstanding higher pressure. However, the conventional oil well cement has some defects, such as low tensile strength, low tensile deformation capacity and easy embrittlement, so it is difficult to meet the requirements of cementing operation of gas storage. Therefore, it is of great significance to study the formula of cementing slurry system for gas storage reservoir and to explore the way to develop the cement slurry system for tensile toughness oil wells, which is of great significance to ensure the normal operation and production of gas storage wells. In this paper, the cement slurry rheometer, thickener, dehydrator, universal testing machine, triaxial compression tester and scanning electron microscope are used to select fibers, latex and calcium carbonate whiskers as cement slurry admixtures. The performance test and analysis of oil well cement system were carried out, and the influence of the admixture and its dosage on the fluidity, rheology and water loss of cement paste was analyzed, and the microstructure of cement paste was studied. The effects of strength and modulus of elasticity on the mechanical properties of cement stone are analyzed. A group of cementing cement slurry formulations for gas storage are selected, and the mechanism of influence of fiber and other slurry materials on the mechanical properties of cement paste is analyzed, and the composition of cementing cement slurry system for gas storage is selected. The engineering applicability and the adaptability of mechanical parameters of cement slurry system are evaluated, which provides the foundation for the well cementing of gas storage reservoir.
【学位授予单位】：东北石油大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TE256

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