Advanced well cementing materials for improved life and environmental impact

Sanjel是一家加拿大公司，在为阿尔伯塔油砂地区的油气井提供服务方面，主要与跨国外资公司竞争。油井，如蒸汽辅助重力泄油（SAGD）井或循环蒸汽增产（CSS）井，都需要进行蒸汽增产。在此过程中，井内材料承受着很高的应力；初始蒸汽循环对位于金属套管和地层岩石之间的水泥环施加应力。此外，在其使用寿命期间，由于向井筒中泵入蒸汽，井温和压力水平会多次循环，从而导致循环热应力和机械应力。目前的固井技术往往缺乏完整性，无法确保井在整个生命周期（10-15年）内的可靠性，由于可能会污染地下水，除了财务问题外，还会对环境和健康产生影响。该项目的目标是：(1)开发新的内部膨胀、基于数字图像相关的测试设备；(2)研究水泥破坏机制；(3)开发模型，以了解和研究低弹性模量、低成本和耐高温的井材料。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，他们严格审查重油行业的健康、安全和环境。该项目将为加拿大公司Sanjel提供竞争优势，并增加其在加拿大西部（Sanjel最大的运营基地）的固井收入，从而极大地造福加拿大。它还将为至少8名高素质人员提供行业相关培训。Sanjel油田之外的另一个好处是，运营公司将使用在加拿大开发和验证的原位技术提取加拿大重油，从而对其井的完整性获得更大的信心。这也将极大地减少阿尔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.