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。该项目的目标是(I)开发新的基于数字图像相关性的内膨胀测试设备，(Ii)研究水泥破坏机理，以及(Iii)开发模型，以了解和研究井用低弹性模数、低成本和耐高温材料。更好的油井完整性将有助于满足运营商、监管机构和公众的要求，他们在健康、安全和环境方面对重油行业进行了严格的审查。该项目将为加拿大公司Sanjel提供竞争优势，并在Sanjel最大的运营基地加拿大西部增加固井收入，从而极大地使加拿大受益。它还将为至少8名高素质人员提供行业相关培训。Sanjel以外的另一个好处是，运营公司将获得对其油井完整性的更大信心，因为他们将使用在加拿大开发和证明的就地技术来开采加拿大重油。这也将大大减少艾伯塔省油砂井对健康和环境的影响。

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. The objectives of this project are to (i) develop new internal expansion, digital image correlation-based testing equipment, (ii) investigate cement failure mechanisms, and (iii) develop models to understand and investigate low modulus of elasticity, low cost, and high temperature resistant materials for wells. Better well integrity will help satisfy operators, regulators and the public, who tightly scrutinize the heavy oil industry with respect to health, safety and the environment. This project will greatly benefit Canada by providing Sanjel, a Canadian company, with a competitive advantage and increased cementing revenue in Western Canada, Sanjel's largest base of operations. It will also provide industry relevant training for at least eight highly qualified personnel. A further benefit, outside of Sanjel, is that operating companies will gain greater confidence in their well integrity, as they will extract Canadian heavy oil using in-situ techniques developed and proven in Canada. This will also greatly minimize the health and environmental impact of Alberta's oil sands wells.