Gas-Lifting Characteristics of Methane-Water Mixture and Its Potential Application for Self-Eruption Production of Marine Natural Gas Hydrates

Zhang, Jinming; Li, Xiao-Sen; Chen, Zhaoyang; Li, Gang; Yan, Kefeng; Lv, Tao

doi:10.3390/en11010240

Cited by 6 publications

(3 citation statements)

References 34 publications

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“…The shortage of oil and gas has become one of the main bottlenecks restricting economic and social development [1][2][3]. Our location to explore energy resources has changed from the land to the ocean, and offshore oil and gas will become important energy resources in the future [4][5][6]. The exploration and utilization of offshore oil and gas resources have attracted more attention in recent years.…”

Section: Introductionmentioning

confidence: 99%

Hydrate Formation and Decomposition Regularities in Offshore Gas Reservoir Production Pipelines

et al. 2020

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In recent years, the exploitation and utilization of offshore oil and gas resources have attracted more attention. In offshore gas reservoir production, wellbore temperature and pressure change continuously when water-bearing natural gas flows upward. The wellbore temperature is also affected by the low-temperature sea water. The combination of temperatures and pressures controlled by the upward flow, and cooling from the surrounding seawater frequently leads to the conditions of temperature and pressure for hydrate formation. This can lead to pipeline blockage and other safety accidents. In this study, we utilize mathematical models of hydrate phase equilibrium, wellbore temperature, wellbore pressure to study hydrate formation and decomposition in offshore gas reservoir production. Numerical solution algorithms are developed and numerical solutions are validated. The sensitivity influence of different parameters on the regions and regularities of hydrate formation and decomposition in wellbores are obtained through numerical simulations. It is found that increased daily gas production, water content, or geothermal gradient in offshore gas reservoir production pipelines results in less hydrate formation in the wellbores. Accordingly, the risk of wellbore blockage decreases and production safety is maintained. Decreased tubing head pressure or seawater depth results in similar effects. The result of this study establishes a set of prediction methods for hydrate formation and decomposition that can be used in the development of guidelines for safe construction design.

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Section: Introductionmentioning

confidence: 99%

Hydrate Formation and Decomposition Regularities in Offshore Gas Reservoir Production Pipelines

et al. 2020

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“…Zhang et al [27] established a two-phase flow model and validated it by comparing pressure prediction with traditional models in oil and gas wells. The main objective of the present research is the preparation of a metering tool (Venturi meter) for suspended gas-solid mixture flows that can be used in coal thermal power stations.…”

Section: Introductionmentioning

confidence: 99%

Experimental Study of the Performance of a Venturi-Meter with Suspended Gas-Solid Flow

Sakr

El‐Askary

Sheha³

et al. 2020

ERJ. Engineering Research Journal

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Due to the urgent need for electricity sources in Egypt, this investigation is an attempt to prepare a metering tool for measuring the flow rate of the suspended gas-solid mixture flows in coal thermal power stations. One of the simplest methods for accurately measuring the flow rate of pulverized coal in the thermal power stations is the venturi meter. In the present work, different geometrical models have been designed and applied for measuring air-coal mixture flow rate, considering the effect of different operational parameters on the pressure sensitivity, pressure recovery and performance of the venturi models. The measurements showed the effects of these parameters on the pressure drop and the pressure distribution. New charts have been deduced from the experimental data for seven non-standard venturi models that shows different effects of particle size, loading ratio and throat length of venturi. From the experimental results a new correlation for two-phase flow discharge coefficient is deduced in the present study. The comparison between the experimental and correlation has been done with error percentage from +25% to -20%.

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“…The development of offshore resources has traditionally relied on floating production systems, such as floating production storage and offloading (FPSO) units and semi-submerged ships [1]. The hydrocarbons produced by an FPSO or from nearby subsea templates are transported through a pipeline or offloaded onto a tanker [2,3]. In terms of offshore pipes, submarine pipelines, which are buried in a trench or laid on the seabed, are commonly used [4,5].…”

Section: Introductionmentioning

confidence: 99%

Sealing Performance Analysis of an End Fitting for Marine Unbonded Flexible Pipes Based on Hydraulic-Thermal Finite Element Modeling

Tang

Zhu

et al. 2019

Energies

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End fittings are essential components in marine flexible pipe systems, performing the two main functions of connecting and sealing. To investigate the sealing principle and the influence of the temperature on the sealing performance, a hydraulic-thermal finite element (FE) model for the end fitting sealing structure was developed. The sealing mechanism of the end fitting was revealed by simulating the sealing behavior under the pressure penetration criteria. To investigate the effect of temperature, the sealing behavior of the sealing ring under different temperature fields was analyzed and discussed. The results showed that the contact pressure of path 1 (i.e., metal-to-polymer seal) was 31.7 MPa, which was much lower than that of path 2 (metal-to-metal seal) at 195.6 MPa. It was indicated that the sealing capacities were different for the two leak paths, and that the sealing performance of the metal-to-polymer interface had more complicated characteristics. Results also showed that the finite element analysis can be used in conjunction with pressure penetration criteria to evaluate the sealing capacity. According to the model, when the fluid pressures are 20 and 30 MPa, no leakage occurs in the sealing structure, while the sealing structure fails at the fluid pressure of 40 MPa. In addition, it was shown that temperature plays a significant role in the thermal deformation of a sealing structure under a temperature field and that an appropriately high temperature can increase the sealing capacity.

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Gas-Lifting Characteristics of Methane-Water Mixture and Its Potential Application for Self-Eruption Production of Marine Natural Gas Hydrates

Cited by 6 publications

References 34 publications

Hydrate Formation and Decomposition Regularities in Offshore Gas Reservoir Production Pipelines

Hydrate Formation and Decomposition Regularities in Offshore Gas Reservoir Production Pipelines

Experimental Study of the Performance of a Venturi-Meter with Suspended Gas-Solid Flow

Sealing Performance Analysis of an End Fitting for Marine Unbonded Flexible Pipes Based on Hydraulic-Thermal Finite Element Modeling

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