涪陵页岩气产出水实现绿色内循环

Core Viewpoint - Fuling Shale Gas Company has made significant progress in green environmental production and resource recycling by utilizing treated produced water for steam boilers and chemical preparation, marking a transition from standard discharge to green internal circulation [1] Group 1: Water Treatment and Utilization - The company has addressed the challenge of produced water management in shale gas extraction, which has garnered industry attention due to the large volumes of bottom-hole liquid produced alongside gas [1] - Advanced treatment devices have been introduced, allowing the company to achieve compliant discharge of produced water, which is now being explored for its deeper value [1] - Treated produced water has been found to outperform tap water in specific applications, particularly in steam boilers and chemical preparation processes [1] Group 2: Economic and Operational Benefits - Previously, steam boilers used tap water with a hardness of approximately 150 mg/L, leading to scaling issues that required additional industrial salt for softening and frequent use of anti-scaling agents, resulting in high costs and risks [1] - The hardness of treated produced water is significantly lower than that of tap water, greatly reducing scale formation and ensuring stable boiler operation while decreasing fuel and chemical consumption, leading to notable overall benefits [1] - The pre-treatment section of the produced water treatment station includes multiple stages such as sedimentation and oxidation, with stringent water quality requirements for chemical preparation [2] Group 3: Chemical Compatibility - Tap water contains various ions that can react with specific chemicals, potentially affecting their viscosity, stability, and shear resistance [2] - The ion composition of treated produced water is simpler and more stable, enhancing compatibility with commonly used chemicals and improving the effectiveness of pre-treatment measures [2]