Potential release of additives used in the hydraulic fracturing process into the atmosphere

水力压裂过程中使用的添加剂可能会释放到大气中

• 批准号: 486291-2015
• 负责人: Olfert, Jason
• 金额: $ 2.94万
• 依托单位: University of Alberta
• 依托单位国家: 加拿大
• 项目类别: Collaborative Research and Development Grants
• 财政年份: 2015
• 资助国家: 加拿大
• 起止时间: 2015-01-01 至 2016-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=585503
• 关键词: Potential; release; additives; used; hydraulic

Flaring is often used in the energy and petrochemical sectors to dispose of unwanted flammable gases. Flaring is preferred to simply venting gases since the global warming potential of CO2 is much lower than that of methane. It has been estimated that 122 billion m3 of gas was flared or vented worldwide in 2008, while in Alberta approximately 1.14 billion m3 was flared or vented in the upstream sector in 2008. Fracturing fluids have been successfully used for many years in the oil and gas industry to increase well-site productivity. However, in recent years the general public and government regulators have voiced concerns about the possible effects these fluids might have on ground water and air quality. The separation processes at upstream battery sites can potentially create scenarios where some droplets of liquid can enter the flare stack. This liquid is mostly water but can contain other substances like salt and fracturing fluid. The proposed research project will investigate the effects of diluted flowback fracturing fluids on flares. A two-pronged approach will be used. Firstly, the Carleton Flare Facility will be used to measure flaring efficiency and emission factors when such fluids are entrained in the fuel. Secondly, a laboratory-sized quiescent flame at the University of Alberta will be used to complete a detailed study of the chemical and physical properties of the gas and particle-phase emissions emitted by flames with fracturing additives. In this laboratory flame, the sampling system will be designed to sample gases and particulates throughout the combustion process (i.e., pre-combustion fuel/fluid mixture, the flame region, and post-combustion products). In the case of both flames, the diluted fracturing fluids tested will be chosen based on an extensive review of fracturing fluid databases and other resources.

燃烧通常用于能源和石化部门，以处理不需要的可燃气体。燃烧比简单地排放气体更受欢迎，因为二氧化碳的全球变暖潜力比甲烷低得多。据估计，2008年全球有1220亿立方米的天然气被燃烧或排放，而在艾伯塔省，2008年上游部门约有11.4亿立方米的天然气被燃烧或排放。 多年来，压裂液已成功地用于石油和天然气行业，以提高井场生产率。然而，近年来，公众和政府监管机构表达了对这些液体可能对地下水和空气质量产生影响的担忧。上游电池位置的分离过程可能会造成一些液滴进入火炬堆的情况。这种液体主要是水，但也可能含有其他物质，如盐和压裂液。 拟议的研究项目将调查稀释的返排压裂液对耀斑的影响。我们将采取双管齐下的方法。首先，卡尔顿耀斑设备将被用来测量当这些液体夹带在燃料中时的燃烧效率和排放系数。其次，艾伯塔大学的实验室大小的静止火焰将被用来完成对带有压裂添加剂的火焰释放的气体和颗粒相排放的化学和物理性质的详细研究。在这个实验室火焰中，采样系统将被设计成在燃烧过程中对气体和颗粒(即燃烧前燃料/液体混合物、火焰区域和燃烧后产物)进行采样。在两种火焰的情况下，将根据对压裂液数据库和其他资源的广泛审查来选择测试的稀释压裂液。