美国页岩气压裂返排液处理技术进展及前景展望

页岩气作为一种非常规天然气资源,正在改变着国际能源市场格局.美国的页岩气储量大,工业开发起步早、时间长,在开发技术方面领先优势显著.由于页岩气储藏的特殊性,在开发过程中会产生大量高盐度、组成复杂的压裂返排液和产出水,处理难度大、污染严重.返排液和产出水的处理通常需经过三级处理流程,依次去除水中悬浮物、压裂液残余成份、浮油和钙镁等二价离子,最后完成脱盐达标排放或回用.目前,我国页岩气产业刚刚起步,学习借鉴美国已成熟并且市场化的技术和设备,对实现我国页岩气开发跨越式发展具有重要的指导意义和借鉴价值.

Frac-back water treatment development and perspective in United States

As an important unconventional natural gas resource, shale gas is the "game changer" of the world energy market. Shale gas in United States has tremendous reserve and its development is much earlier than the other countries. Large amount of frac-back water with high salinity and high pollution is produced during the exploration. Frac-back water is difficult to be treated, which usually requires three steps: remove suspended solid and large molecule residuals, remove positive divalent ions (such as calcium and magnesium), and desalination to reach the discharge or reuse requirements. Shale gas industry in China is just started, so that mature-marketed products and techniques from United States are significant for our shale gas industry development.