Advanced well cementing materials for improved life and environmental impact

Sanjel是一家加拿大独资公司，主要与跨国公司竞争，为艾伯塔省油砂地区的油气井提供服务。蒸汽辅助重力排水(SAGD)井或周期蒸汽吞吐(CS)井等油井需要进行蒸汽吞吐。在这个过程中，油井材料受到很大的压力；最初的蒸汽循环对位于金属套管和地层岩石之间的水泥环施加压力。此外，在其生命周期内，由于在井筒中抽出蒸汽，井内温度和压力水平会循环多次，从而导致循环的热应力和机械应力。目前的固井技术往往缺乏所需的完整性，无法自信地确保油井在整个生命周期(10-15年)内的可靠性，由于地下水可能受到污染，除了所涉资金问题外，这还会对环境和健康产生影响。

Sanjel is a Canadian owned company that largely competes against multi-national foreign owned companies to service oil and gas wells in the Alberta oil sands region. Oil wells, such as Steam Assisted Gravity Drainage (SAGD) wells or Cyclic Steam Stimulations (CSS) wells, are subjected to steam stimulation. During this process, well materials are highly stressed; the initial steam cycle stresses the cement sheath located between the metal casing and the formation rock. Furthermore, during its life, the well temperature and pressure levels cycle numerous times as a result of pumping steam in the wellbore, which leads to cyclic thermal and mechanical stresses. Current cementing technology tends to lack the integrity required to confidently ensure complete well reliability over the entire life span (10-15 years) of the well, which, due to the potential for ground water contamination, has both environmental and health impacts in addition to the financial implications.