Preprints
https://doi.org/10.5194/egusphere-2023-1141
https://doi.org/10.5194/egusphere-2023-1141
02 Aug 2023
 | 02 Aug 2023

A Hydrate Reservoir Renovation Device and Its Application in Nitrogen Bubble Fracturing

Jingsheng Lu, Yuanxin Yao, Dongliang Li, Jinhai Yang, Deqing Liang, Yiqun Zhang, Decai Lin, and Kunlin Ma

Abstract. Natural gas hydrate (GH) is a significant potential energy source due to its large reserves, wide distribution, high energy density and low pollution. However, the gas production rate of past gas hydrate production tests is much lower than the requirement of commercial gas production. Reservoir stimulation technologies like hydraulic fracture provide one potential approach to enhance gas production from GH. The reservoir reformation behaviour of the hydrate-bearing sediments (HBS), particularly sediments with a high clay content, is a complex process during a hydraulic fracturing operation, which has been poorly understood and thus hardly predictable. This paper presents an experimental facility that was developed to analyze the hydraulic fracture mechanism in synthesized HBS. This facility can be used to form GH in sediments, conduct visual observation of hydraulic fracturing experiments, and measure the permeability of HBS under high pressure (up to 30 MPa) and low-temperature conditions (from 253.15 K to 323.15 K). It is mainly composed of a pressure control and injection unit, a low temperature and cooling unit, a cavitation unit, a visual sapphire reactor, and a data acquisition and measurement unit. The hydraulic fracture module is consisting of a gas cylinder, fracturing pump, hopper, proppants warehouse and valves. The sapphire reservoir chamber is applied to observe and measure the fracture of HBS during hydraulic fracturing. The permeability test module is composed of a constant-flux pump and pressure sensors, which can evaluate the permeability performance before and after hydraulic fracture in HBS. The fundamental principles of this apparatus are discussed. Some tests were performed to verify hydraulic fracture tests and permeability tests could be practically applied in the HBS exploitation.

Jingsheng Lu, Yuanxin Yao, Dongliang Li, Jinhai Yang, Deqing Liang, Yiqun Zhang, Decai Lin, and Kunlin Ma

Status: closed

Comment types: AC – author | RC – referee | CC – community | EC – editor | CEC – chief editor | : Report abuse
  • CC1: 'Comment on egusphere-2023-1141', Yanghui Li, 10 Jan 2024
    • CC2: 'Reply on CC1', Jingsheng Lu, 21 Feb 2024
  • RC1: 'Comment on egusphere-2023-1141', Anonymous Referee #1, 12 Jan 2024
    • CC5: 'Reply on RC1', Jingsheng Lu, 21 Feb 2024
  • RC2: 'Comment on egusphere-2023-1141', Anonymous Referee #2, 24 Jan 2024
    • CC3: 'Reply on RC2', Jingsheng Lu, 21 Feb 2024
  • RC3: 'Comment on egusphere-2023-1141', Anonymous Referee #3, 16 Feb 2024
    • CC4: 'Reply on RC3', Jingsheng Lu, 21 Feb 2024
  • AC1: 'Comment on egusphere-2023-1141', Dongliang Li, 26 Feb 2024
  • AC2: 'Comment on egusphere-2023-1141', Dongliang Li, 26 Feb 2024

Status: closed

Comment types: AC – author | RC – referee | CC – community | EC – editor | CEC – chief editor | : Report abuse
  • CC1: 'Comment on egusphere-2023-1141', Yanghui Li, 10 Jan 2024
    • CC2: 'Reply on CC1', Jingsheng Lu, 21 Feb 2024
  • RC1: 'Comment on egusphere-2023-1141', Anonymous Referee #1, 12 Jan 2024
    • CC5: 'Reply on RC1', Jingsheng Lu, 21 Feb 2024
  • RC2: 'Comment on egusphere-2023-1141', Anonymous Referee #2, 24 Jan 2024
    • CC3: 'Reply on RC2', Jingsheng Lu, 21 Feb 2024
  • RC3: 'Comment on egusphere-2023-1141', Anonymous Referee #3, 16 Feb 2024
    • CC4: 'Reply on RC3', Jingsheng Lu, 21 Feb 2024
  • AC1: 'Comment on egusphere-2023-1141', Dongliang Li, 26 Feb 2024
  • AC2: 'Comment on egusphere-2023-1141', Dongliang Li, 26 Feb 2024
Jingsheng Lu, Yuanxin Yao, Dongliang Li, Jinhai Yang, Deqing Liang, Yiqun Zhang, Decai Lin, and Kunlin Ma
Jingsheng Lu, Yuanxin Yao, Dongliang Li, Jinhai Yang, Deqing Liang, Yiqun Zhang, Decai Lin, and Kunlin Ma

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Short summary
Natural gas hydrate (GH) is a significant potential energy source. However, the gas production rate of past gas hydrate production tests is much lower than the requirement of commercial gas production. Reservoir stimulation technologies like hydraulic fracture provide one potential approach to enhance gas production from GH. This paper presents an experimental facility that was developed to analyze the hydraulic fracture mechanism in synthesized HBS.