Abstract:

A large amount of wastewater is generated during production and various operations in oil and gas fields,and the cost of wastewater treatment is increasing yearly. If oil and gas field wastewater can be directly or simply treated and used for the preparation of water-based fracturing fluids. In that case, it can significantly reduce the amount of freshwater and will inevitably reduce the production cost of oil and gas fields. Therefore, it has significant economic and ecological benefits. This paper revealed the problems and challenges in the preparation of water-based fracturing fluids from oil and gas field wastewater. The progress in the research fields of commonly used guar gum and its derivatives crosslinking systems, cellulose and its derivatives crosslinking systems, synthetic polymer fracturing fluids, clean fracturing fluids, and slick water fracturing fluids was comprehensively reviewed to illustrate the feasibility of utilization of oil and gas field wastewater. It is pointed out that the treatment technology of oil and gas field wastewater and the synthesis technology of salt-tolerant polymers are the keys to promote the preparation of water-based fracturing fluid from wastewater. It provided specific solutions for the resource utilization of oil and gas field wastewater, and look forward to the prospect of related technologies, which provided the direction for the development of wastewater reuse technology in the whole oil and gas field.

Key words: oil and gas field wastewater, fracturing fluid, guar gum, cellulose, polymer

摘要：

油气田在生产和各种作业过程中会产生大量的废水，而废水的处理成本也在逐年增加。如果能将油气田废水直接或简单处理后用于水基压裂液的配制，可以显著降低淡水的用量，也必然会减少油气田的生产成本，因此具有明显的经济效益和生态效益。揭示了油气田废水配制水基压裂液存在的问题与挑战，并综合评述了常用的瓜胶及其衍生物交联体系、纤维素及其衍生物交联体系、合成聚合物压裂液、清洁型压裂液以及滑溜水压裂液等研究领域的进展，旨在说明油气田废水资源化利用的可行性。指出油气田废水的处理技术和耐盐聚合物的合成技术是推动废水配制水基压裂液的关键，为油气田废水的资源化利用提供了具体的解决思路，对相关技术前景进行了展望，为整个油气田废水回用技术发展指明了方向。

关键词: 油气田废水, 压裂液, 瓜胶, 纤维素, 聚合物

CLC Number: 

• X741