Version 1
: Received: 30 October 2023 / Approved: 30 October 2023 / Online: 31 October 2023 (02:58:34 CET)
Version 2
: Received: 2 December 2023 / Approved: 14 December 2023 / Online: 14 December 2023 (06:30:02 CET)
Lu, D.; Chen, J.; Wu, F.; Jiang, D.; Liu, W.; Ding, B.; Luo, X.; Kang, Y.; He, Y. Comprehensive Research on Construction and Stability of Horizontal-Well Cavity Natural Gas Storage in Thinly Bedded Salt Rocks in China. Energies2023, 16, 7877.
Lu, D.; Chen, J.; Wu, F.; Jiang, D.; Liu, W.; Ding, B.; Luo, X.; Kang, Y.; He, Y. Comprehensive Research on Construction and Stability of Horizontal-Well Cavity Natural Gas Storage in Thinly Bedded Salt Rocks in China. Energies 2023, 16, 7877.
Lu, D.; Chen, J.; Wu, F.; Jiang, D.; Liu, W.; Ding, B.; Luo, X.; Kang, Y.; He, Y. Comprehensive Research on Construction and Stability of Horizontal-Well Cavity Natural Gas Storage in Thinly Bedded Salt Rocks in China. Energies2023, 16, 7877.
Lu, D.; Chen, J.; Wu, F.; Jiang, D.; Liu, W.; Ding, B.; Luo, X.; Kang, Y.; He, Y. Comprehensive Research on Construction and Stability of Horizontal-Well Cavity Natural Gas Storage in Thinly Bedded Salt Rocks in China. Energies 2023, 16, 7877.
Abstract
This study aimed to overcome the difficulty of conducting the horizontal-well cavity leaching test in the field and to investigate the long-term stability of the horizontal-well salt-cavity natural gas storage. The simulation test design is combined with the similarity theory to study the cavity expansion characteristics and the influence law of cavity leaching parameters. Through the design of a rubber hose connection, an integrated closed test system for multi-stage horizontal-well cavity leaching and brine drainage was built. The test system also realises the repeatable backward movement of the injection well during the test. A similarity simulation of the test design was carried out, and the test platform was constructed to carry out multi-stage horizontal-well leaching tests with a nitrogen cushion. In the horizontal-well leaching tests with a nitrogen cushion, the influence laws of the well spacing, flow rate and liquid level position on cavity expansion were investigated. Based on the morphological characteristics of the horizontal-well cavity, a numerical model of the horizontal-well salt cavity was developed, which reflects the real cavity morphology leached in the test. The long-term stability of the horizontal-well salt-cavity natural gas storage under different internal pressures was investigated through numerical simulation.
Keywords
natural gas storage; bedded salt rock; multi-stage horizontal cavity leaching; nitrogen cushion
Subject
Engineering, Mining and Mineral Processing
Copyright:
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
Commenter: Dan Lu
Commenter's Conflict of Interests: Author