Novel cementing materials formulations containing flexible polymeric admixtures have been studied aiming at improving the mechanical behavior of oil well cement slurries submitted to steam injection. However, research activities in this sector are still under development. The steam injected directly into the well causes casing dilation, which after a reduction in temperature, tends to return to its original dimensions, resulting in crack formation and hydraulic isolation loss of the well, which will result in shortening of well life. In this scenario, the objective of the present study was to evaluate the mechanical behavior of Portland-based slurries containing SBR latex, applied in oil well cementing of wells submitted to steam injection. Were formulated slurries with densities of 1.797 g/cm3 (15.0 lb/Gal) and 1.869 g/cm3 (15.6 lb/Gal), containing admixtures with a latex concentration of 0; 66.88; 133.76; 200.64 and 267.52 L/m3 (0, 0.5, 1.0, 1.5 and 2.0 gpc). Tests including rheology, fluid loss control, thickening time, API compressive strength and splitting tensile strength, beyond steam injection simulation. Microstrutural characteristics of the slurries were also performed (XRD, TG, FTIR and SEM). The results showed that increasing the polymer concentration increased in the rheological properties and fluid loss, and a decrease in the elasticity modulus of the cement slurries. The results obtained showed that the slurries can be applied in cementing operations of oil wells submitted to steam injection.
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机译：为了改善提交蒸汽注入的油井水泥浆的机械性能，已经研究了包含柔性聚合物掺合物的新型胶结材料配方。但是，该领域的研究活动仍在进行中。直接注入井中的蒸汽导致套管膨胀，温度降低后，套管膨胀趋于恢复其原始尺寸，从而导致裂缝形成和井的水力隔离损失，从而缩短井的寿命。在这种情况下，本研究的目的是评估含SBR胶乳的波特兰浆液的机械性能，该浆液用于注水井的油井固井。分别配制了密度为1.797 g / cm3（15.0 lb / Gal）和1.869 g / cm3（15.6 lb / Gal）的浆液，其中包含的乳胶浓度为0； 66.88； 133.76； 200.64和267.52 L / m3（0、0.5、1.0、1.5和2.0 gpc）。测试包括流变学，流体损失控制，增稠时间，API抗压强度和劈裂抗张强度，这超出了蒸汽注入模拟。还进行了浆料的微结构特征（XRD，TG，FTIR和SEM）。结果表明，增加聚合物浓度可提高水泥浆的流变性和流体损失，并降低其弹性模量。所得结果表明该浆液可用于注蒸汽的油井固井作业。
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