Title:

Preparation of High Water Carrying Foam System and Its Dynamic Water Carrying Performance

Authors:

Ziwei QIAN, Hongyu YE, Yuanyuan SU, Xiuhua ZHENG

Key Words:

pneumatic DTH Hammer; geothermal well; high water-carrying foam system; dynamic water-carrying capacity

Conference:

Stanford Geothermal Workshop

Year:

2022

Session:

Drilling

Language:

English

Paper Number:

Qian

File Size:

770 KB

View File:

Abstract:

Since China proposed to achieve carbon peaking in 2030 and carbon neutrality in 2060, the development of geothermal energy in China has attracted much attention. Geothermal energy resources are large, clean, and have a good economy. Aiming at the problem of formation water outlets in geothermal wells, the research of foam systems with high water carrying capacity is put forward. Firstly, the concept of high water carrying foam system was proposed to solve the common water carrying problem in hot spring Wells, and a water-carrying method combining solid-phase water-carrying agent and foam was proposed. Secondly, the foaming agent, stabilizing agent, and solid-phase water-carrying agent in the high water carrying foam system were screened to determine the formula of the high water carrying foam system. Finally, the dynamic water carrying performance of this water carrying method is studied. The results show that (1) the foam system with high water carrying capacity formed by the combination of solid phase water carrying agent and foam has better water carrying capacity; (2) the foam system has the best dynamic water carrying capacity when the liquid holding rate is 18.9%-19.6%, and the dynamic water carrying capacity is as high as 84%.


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