Key technologies for salt-cavern underground gas storage construction and evaluation and their application

Wanyan, Qiqi; Ding, Guoyu; Zhao, Yan; Li, Kang; Deng, Jingen; Zheng, Yali

doi:10.1016/j.ngib.2018.11.011

Cited by 21 publications

(7 citation statements)

References 2 publications

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“…The maximum salt layer thickness was reported 350 to 695 m. These dimensions meet the standard design feature for the salt cavern creation. The faulted anticline structure may raise the security concern of cavern stability [68,[71][72][73][74][75]. The officer basin comprises interbedded halite rock, limestone, siltstone, sandstone and other salts.…”

Section: The Officer Basinmentioning

confidence: 99%

Quantifying onshore salt deposits and their potential for hydrogen energy storage in Australia

Aftab

Hassanpouryouzband

Naderi³

et al. 2023

Journal of Energy Storage

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Section: The Officer Basinmentioning

confidence: 99%

Quantifying onshore salt deposits and their potential for hydrogen energy storage in Australia

Aftab

Hassanpouryouzband

Naderi³

et al. 2023

Journal of Energy Storage

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“…Clean water is injected through the pipe in an artificial way to dissolve the salt layer. The cave formed by water leaching is the gas storage [5,6]. In the process of cavity formation of dissolved salt, thermal-elastoplastic changes are generated due to internal temperature, pressure, etc., and a well-sealed cavity is finally formed, with good stability and air storage ability [7][8][9].…”

Section: Introductionmentioning

confidence: 99%

Study on Secondary Brine Drainage and Sand Control Technology of Salt Cavern Gas Storage

Zhang

et al. 2023

Sustainability

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Geological conditions of salt cavern gas storage in China are characterized by dominantly layered salt layers with a high content of insoluble mudstone. After the water leaching of the salt layer, a large amount of sediment accumulates at the bottom of the gas storage cavity. During the gas injection process, only the clean brine above the sediment can be expelled, leaving a brine layer of 2–5 m and a large amount of brine in the pore space of the sediment. To increase storage capacity, it is urgent to explore the secondary gas injection and brine drainage technology to further expel residual brine in pores of the sediment at the cavern bottom. The sediment is relatively loosely packed and is composed of mudstone particles, which easily migrate and block the brine withdrawal pipe. In this paper, firstly, the mineral composition, particle size and distribution characteristics of the sediment at the bottom of the salt cavern are fully understood by XRD and sieve analysis methods. Then, a lab simulation device suitable for secondary gas injection and brine drainage of a high-salinity salt cavern with a diameter and height of 25 cm was designed and built. A screen sand control experiment, a gravel pack artificial wall sand control experiment and chemical cementing sand were simulated. The effects of gas injection, brine drainage pressure, brine layer height and insoluble particle size on sand production and liquid drainage were studied. The influence factors of brine withdrawal on the sand control in secondary brine drainage were intensively investigated, and finally, the gravel pack artificial wall sand control technology system was recommended. The optimal construction parameters for secondary brine discharge are recommended as follows: Under the condition of gravel packing with the same particle size, the trend of sand content with different artificial wall thicknesses is not obvious, and a 2 cm wall thickness is the best in the overall experiment, corresponding to 28 cm in the field. The larger the particle size of the gravel pack, the better the sand control, and the best gravel size is 10–20 mesh. The injection pressure should be as low as possible.

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“…Gas storage wells constructed from depleted oil or gas reservoirs are reliable and cost‐effective 1 . In general, gas injection and gas storage production are performed after drilling and cementing 2 . Cementing the well involves setting casing pipes at a particular drilling depth into the formation and then filling the annular space outside the casing pipes with a cement slurry 3 .…”

Section: Introductionmentioning

confidence: 99%

Deformation and damage of cement sheath in gas storage wells under cyclic loading

Li¹,

Tang³

et al. 2021

Energy Science & Engineering

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The mechanical damage and failure of cement sheaths in gas storage wells under cyclic loading have been studied extensively. However, because the test device cannot restore the wellbore condition, most studies have been theoretical or regular experimental. If the load‐bearing mode and stress environment in a test device differ from those in a wellbore, then the damage and failure modes will deviate from what occurs in the actual wellbore. Therefore, it is necessary to explore a method that restores the wellbore condition and design a wellbore simulation device that reveals the deformation and damage of the cement sheath. In this study, the development laws of microannulus and microcracks in the cement sheath were studied by triaxial cyclic loading, low‐field nuclear magnetic resonance imaging, and scanning electron microscopy. A device to evaluate cement sheath integrity was then developed. A stress equivalence method was proposed, based on the principle that the stresses at the first and second interfaces of the device are equal to those of the wellbore cement sheath. This method was used to design material, size, and experimental conditions to simulate the load‐deformation law of a cement sheath in a gas storage well. The damage failure mechanism was investigated using the simulation results and computed tomography. Micropores and microcracks in the cement sheath increased continuously under cyclic loading. Damage accumulated, causing strength failure as the period of the cyclic loading increased. Plastic deformation of the cement sheath occurred under cyclic loading, but interfacial peeling did not. The reason is that the cement sheath is under compressive stress during loading and unloading, and the interface between the cement sheath and the outer wall is not damaged. This study provides a new method for studying the mechanical failure of a cement sheath under complex wellbore conditions.

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Key technologies for salt-cavern underground gas storage construction and evaluation and their application

Cited by 21 publications

References 2 publications

Quantifying onshore salt deposits and their potential for hydrogen energy storage in Australia

Quantifying onshore salt deposits and their potential for hydrogen energy storage in Australia

Study on Secondary Brine Drainage and Sand Control Technology of Salt Cavern Gas Storage

Deformation and damage of cement sheath in gas storage wells under cyclic loading

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