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Study On Water Quality Treatment Process For Surface Water Injection
With the support of national policies and the continuous attention of social industry enterprises, the utilization of hydrothermal geothermal resources in China has continued growth. In some areas where geothermal resource was developed early, such as Beijing, Tianjin, Xiong'an New Area, Shandong and other places, the geothermal reservoir pressure showed a clear downward trend. Surface water injection is a new direction to achieve sustainable development of geothermal resources during the non-heating period. The construction of surface water injection system requires four conditions: water source, geothermal reservoir injection capacity, heat source and water treatment process. In order to select the appropriate water treatment process, this paper uses the simulated water treatment experimental platform to carry out multiple process experiments with surface water as raw water. The simulated water treatment experimental platform is easy to operate, and multiple experiments can be carried out to avoid the risk of replacing equipment after the completion of the project due to the changes of surface water quality. Through the full geothermal analysis, suspended solid content, median particle size and bacterial analysis of the experimental water production, combined with the results of the high-temperature and high-pressure water-rock reaction, it is selected that no obvious water-rock reaction will occur, and the water treatment process that does not block the reservoir, is easy to operate, has stable operation and low cost, and is used as a water treatment process for surface water injection project.