页岩气中甲烷在返排液中溶解度的研究进展

Research progress on the solubility of methane in shale gas in flowback fluid

天然气在清洁能源市场中占据越来越重要的地位,在“碳达峰”与“碳中和”的战略背景下,非常规天然气—页岩气开采行业正面临甲烷逸散治理的严峻挑战。压裂、生产过程中甲烷大量无规则的逸散不仅浪费资源,更对周边环境乃至全球生态系统都构成了巨大的威胁。如何精确了解甲烷排放速率,是构建页岩气排放评估体系把控手段中重要的一环。甲烷溶解度的变化直接影响甲烷的逸散速率与总量,因此,对其规律的探索成为当前研究的重中之重。本文在前人实验的基础上,对影响甲烷溶解度的温度、压力以及矿化度等因素进行了深入论述,有助于构建排放评估体系、优化工艺设计,为实现减排目标提供理论支持。

Natural gas occupies an increasingly important position in the clean energy market,and under the strategic background of"carbon peak"and"carbon neutrality",the unconventional natural gas-shale gas extraction industry is facing severe challenges in methane fugitive control.The large and random escape of methane in the process of fracturing and production not only wastes resources,but also poses a huge threat to the surrounding environment and even the global ecosystem.How to accurately understand the methane emission rate is an important part of the construction of shale gas emission assessment system.The change of methane solubility directly affects the escape rate and total amount of methane,so the exploration of its law has become the top priority of current research.Based on previous experiments,this paper discusses the factors such as temperature,pressure and salinity that affect methane solubility,which is helpful to construct an emission assessment system,optimize process design,and provide theoretical support for achieving emission reduction goals.