Nanoengineered Cement for More Effective Remedial Cementing Jobs

The success of remedial cementing jobs is crucial, as its failure, not only may further damage the well, but also may lead to the total loss of wellbore. Therefore, it becomes necessary to develop reliable technologies to make these treatments operationally and economically more effective. Obviously, more effective cementing materials would improve the chance to address any integrity issues related to presence of microannulus. We present a novel solution by engineering the cement at the material scale to carefully adjust its rheology and mechanical properties to sneak into narrow opening and develop stronger bonding with pre-existing cements. We seek for better penetration into narrow spaces behind the casing with appropriate thickening time, low set-cement permeability, and high strengths. The outcome could provide an economic solution although involved with manipulating cement properties at the molecular scales.