An innovative experimental apparatus for the analysis of sand production during natural gas hydrate exploitation

2021 ◽  
Vol 92 (10) ◽  
pp. 105110
Author(s):  
Jingsheng Lu ◽  
Dongliang Li ◽  
Deqing Liang ◽  
Lingli Shi ◽  
Xuebing Zhou ◽  
...  
Keyword(s):  
Natural Gas ◽  
Gas Hydrate ◽  
Sand Production ◽  
Natural Gas Hydrate ◽  
Experimental Apparatus

scholarly journals A Solution to Sand Production from Natural Gas Hydrate Deposits with Radial Wells: Combined Gravel Packing and Sand Screen

2022 ◽  
Vol 10 (1) ◽  
pp. 71
Author(s):  
Yiqun Zhang ◽  
Wei Wang ◽  
Panpan Zhang ◽  
Gensheng Li ◽  
Shouceng Tian ◽  
...  
Keyword(s):  
Natural Gas ◽  
Gas Hydrate ◽  
Control Method ◽  
Gas Production ◽  
Sand Production ◽  
Natural Gas Hydrate ◽  
Vertical Well ◽  
Sand Control ◽  
Gravel Packing ◽  
Radial Well

Sand production is one of the main problems restricting the safe, efficient and sustainable exploitation of marine natural gas hydrate. To explore the sand-control effects of gravel packing, experiments that simulate hydrate extraction in the water-rich environment were conducted with designed hydrate synthesis and exploitation devices. Three sand control completion methods, including 120 mesh sand screen, 400 mesh sand screen, 120 mesh sand screen combined with gravel packing, are adopted. Sand and gas production rates were compared under different well types and sand control completion methods. Results show that the gas production modes of radial wells and vertical wells are almost the same at the same time due to the small experimental scale and high permeability. The sand production of the vertical well with gravel packing combined with a sand-control screen is 50% lower than that of the vertical well with sand-control screens only. Radial well with gravel packing combined with sand-control screens produced 87% less sand than screen mesh alone. The cumulative gas production and recovery rates of a radial well with the composite sand control method are better than those without gravel packing in the same development time.

scholarly journals Study on the Influence of Sand Production on Seepage Capacity in Natural Gas Hydrate Reservoirs

Geofluids ◽  
2021 ◽  
Vol 2021 ◽  
pp. 1-8
Author(s):  
Yongmao Hao ◽  
Jikai Liang ◽  
Chuixian Kong ◽  
Mingwu Fan ◽  
Hongzhi Xu ◽  
...  
Keyword(s):  
Fluid Flow ◽  
Numerical Model ◽  
Natural Gas ◽  
Physical Properties ◽  
Gas Hydrate ◽  
Sand Production ◽  
Natural Gas Hydrate ◽  
High Concentration ◽  
The Impact ◽  
Hydrate Reservoirs

Sand production has become a common phenomenon in the exploitation of unconsolidated natural gas hydrate reservoirs, which will hinder the long-term production of natural gas hydrate reservoirs. However, there are few literatures reported on the influences in reservoir physical properties such as permeability and porosity, and production laws caused by sand production. This paper provides a numerical model, coupled with reservoir sand-gas-water multiphase flow processes, which is capable to simulate the process of sand production in natural gas hydrate reservoirs. The simulation results indicate that sand settlement is mainly concentrated near the wellbore due to the high concentration of migrated sand. The decrease in reservoir porosity and permeability caused by sand settlement has a significant impact on production. The impact of sand production on reservoir fluid fluidity shows that fluid flow is inhibited near the wellbore, while fluid flow performance increases far away from the wellbore. The numerical model and analysis presented here could provide useful insight into changes in reservoir physical properties and production laws caused by sand production in the natural gas hydrate-bearing marine sediments using depressurization method.

Technical Analysis of Sand Production for Offshore Natural Gas Hydrate Trials in South China Sea

2021 ◽  
Author(s):  
Kun An ◽  
Lawrence Khin Leong Lau ◽  
Jian Li ◽  
Jia Liu
Keyword(s):  
Particle Size ◽  
Natural Gas ◽  
South China Sea ◽  
South China ◽  
Gas Hydrate ◽  
Clean Energy ◽  
Technical Analysis ◽  
Sand Production ◽  
Natural Gas Hydrate ◽  
China Sea

Abstract Natural gas hydrate emerges as a sustainable and alternative clean energy source. Japan (2013) and China (2017) have performed production trials on marine natural gas hydrate successfully. Sand production with associated risk is one of the main challenges for offshore natural gas hydrate production trials in Japan and China. Technical assessment related to sand production, transport and erosion is a crucial part for overall sand management strategy. This paper demonstrates the importance of flow assurance for marine natural gas hydrate production through the analysis of sand management in South China Sea ShenHu area. Multiphase modelling tool is used to investigate sand transport phenomenon, with parametric study focuses on the effects of production rates, particle bed height and sand particle size. Detailed analysis of particle flow and related erosion along production flow path is investigated by developing a 3-dimensional Computational Fluids Dynamics (CFD) model. Based on the matrix of sensitivity study, steady state operational map for continuous marine natural gas hydrate production is proposed. Such operational map provides useful risks level ranking based on actual field parameters including gas production rate, sand loading and particle size. The operator can maintain production at a lower risk based on the operational map. Through detailed technical analysis of sand production and transport, risks associated with sand blockage and erosion can be actively managed. This provides high values in terms of operational safety, asset integrity, and full compliance with related national or international HSSE standards.

scholarly journals Injection of CO2/N2 gaseous mixtures into gas hydrates to contemporary perform CH4 recovery and CO2 storage

2021 ◽  
Vol 312 ◽  
pp. 08009
Author(s):  
Mirko Filipponi ◽  
Alberto Maria Gambelli ◽  
Yan Li ◽  
Andrea Presciutti ◽  
Beatrice Castellani ◽  
...  
Keyword(s):  
Carbon Dioxide ◽  
Natural Gas ◽  
Gas Hydrate ◽  
Co2 Storage ◽  
Gaseous Mixture ◽  
Small Scale ◽  
Carbon Dioxide Injection ◽  
Natural Gas Hydrate ◽  
Gaseous Mixtures ◽  
Experimental Apparatus

Carbon dioxide injection into natural gas hydrate reservoirs represents a promising opportunity to predispose a theoretically carbon neutral energy source. This technique allows to replace methane molecules with an equal number of carbon dioxide molecules and, consequently, to balance in advance emissions associated to methane utilization. While the direct CH4/CO2 replacement has been widely investigated, more data and scientific evidences are required to well define the feasibility of recovering methane by replacing it with CO2-based gaseous mixtures. In this sense, the most promising opportunity consists in flue-gas mixtures. In some cases, the presence of nitrogen was found capable to improve the overall efficiency, due to the direct competition between CH4 and N2 molecules to fill small cages characterizing hydrate structures. Moreover, these mixtures are extremely less-expensive than pure carbon dioxide. In this work, a binary CO2/N2 (50/50 vol%) gaseous mixture was used to recover methane contained into hydrate structures. Experiments were carried out in a small-scale experimental apparatus, designed to simulate a natural gas hydrate reservoir and to intervene on it with replacement techniques. Composition of gaseous mixtures present into hydrates and in the gaseous phase present immediately above, where defined via gas-chromatographic analyses. Finally, results were compared with data currently present in literature, in order to validate their consistency.

An innovative experimental apparatus for the analysis of natural gas hydrate erosion process using cavitating jet

2020 ◽  
Vol 91 (9) ◽  
pp. 095107
Author(s):  
Yiqun Zhang ◽  
Kexian Zhao ◽  
Xiaoya Wu ◽  
Shouceng Tian ◽  
Huaizhong Shi ◽  
...  
Keyword(s):  
Natural Gas ◽  
Gas Hydrate ◽  
Erosion Process ◽  
Natural Gas Hydrate ◽  
Experimental Apparatus ◽  
Cavitating Jet
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