شهریار عصفوری

Cementing operations of oil and gas wells are one of the most important and costly operations in the entire life cycle of an oil or gas well. Therefore, the quality and type of performance of the designed cement is very important. In well cementing, Portland cement faces porous formations in deep wells with a temperature up to 352 °C and a pressure of about 2000 Psi. In addition to this exhausting pressure and temperature, the cement must be designed in such a way that firstly, it does not leak in porous formations, secondly, it resists corrosive fluids, and thirdly, its pressure is higher than the formation fluid pressure. And this is only possible by adding enhancers that make it possible for the cement to withstand these conditions. Enhancers modify the behavior of the cement system and allow the cement to be placed in the desired location, i.e., between the casing and the well wall, to start setting there and show good compressive strength. It should also be resistant to water-bearing formations and increase the life of the well. Among the most important features of drilling cement additives are controlling the fluid loss of drilling cement, controlling the weight of cement, setting time, and increasing the compressive strength of cement. In this study, we intend to describe and evaluate the addition of nanomaterials to drilling cement, and by introducing and constructing a type of new nanocomposites as drilling cement additives, for the first time, we can control the fluid loss of cement and also the weight of drilling cement to the most optimal possible state and take a big step in the drilling industry.