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Abstract
The Experimental Simulation Technology and System of Solid Fluidization Exploitation of Marine Non-Diagenetic Natural Gas Hydrate
Highlights
The project team led by Zhou, Academician of Chinese Academy of Engineering, divided the hydrate into the kind of diagenetic and non-diagenetic, proposed the technological strategy of 6 “utilize”, firstly created the technological principle of solid fluidization exploitation of non-diagenetic natural gas hydrate and the technological process of hydrate mining, crushing, ejection and fluidization of seawater, separation and backfill of sand, slurry lift and deep separation and re-backfill in the platform, and achieved the safe and green exploitation which let nature take its course, turned the harm into a benefit, and turned the uncontrollable into controllable
The system consists of 3 modules of rapid preparation, fragmentation and slurry modulation of large samples, high-efficient pipeline transportation and separation of slurry, and real-time image capture, data collection and safety control and 12 subsystems of preparation, fragmentation, slurry modulation, screw pump conveying, horizontal pipeline transportation and decomposition, vertical pipeline transportation and decomposition, multistage depressurization, multistage heating, sample analysis of on-line automatic preservation of heat and pressure, three-phase separation, operation monitoring, and image capture and data test and analysis
Based on the formation physical properties of natural gas hydrate reservoir in the target area of test production with water depth of 1310 m, and buried depth of 117-192 m, such as argillaceous silty sand, loose argillaceous cementation, non-diagenesis, average porosity of 43%, and average saturation of 40%, the simulation experiment of solid fluidization exploitation of marine non-diagenetic gas hydrate is carried out supported by the large-scale physical simulation experiment system
Summary
The project team led by Zhou, Academician of Chinese Academy of Engineering, divided the hydrate into the kind of diagenetic and non-diagenetic, proposed the technological strategy of 6 “utilize”, firstly created the technological principle of solid fluidization exploitation of non-diagenetic natural gas hydrate and the technological process of hydrate mining, crushing, ejection and fluidization of seawater, separation and backfill of sand, slurry lift and deep separation and re-backfill in the platform, and achieved the safe and green exploitation which let nature take its course, turned the harm into a benefit, and turned the uncontrollable into controllable. The Experimental Simulation Technology and System of Solid Fluidization Exploitation of Marine Non-Diagenetic Natural Gas Hydrate
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