System and method for visually evaluating production and blockage law of hydrate in screen

A hydrate formation and evaluation system technology, applied in the direction of testing moving fluid/granular solids, etc., can solve problems such as unsatisfactory risk assessment, and achieve the effect of protecting the seal and avoiding direct impact
CN108226162AActive Publication Date: 2018-06-29QINGDAO INST OF MARINE GEOLOGY +1
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
QINGDAO INST OF MARINE GEOLOGY
Publication Date
2018-06-29

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Abstract

The invention provides a system for visually evaluating a production and blockage law of hydrate in a screen and a testing method thereof. An experimental system for testing a secondary production, enrichment and blockage law of the hydrate in a screen mesh comprises a reaction kettle, a gas-liquid mixed conveying coil, a high-speed camera, a data acquisition and processing module and the like. The testing method is based on the system, and through adjustment of a cooling mode and control of a temperature and pressure condition and a gas-liquid ratio condition, a three-dimensional chart of thesecondary production and blockage of the hydrate in the screen mesh is simulated; the system can provide basic data for calculation of a well-bottom screen sand control additional skin factor and formulation of a precise pressure-reducing and temperature-controlling scheme under different well body structure conditions (a vertical well, a horizontal well or a multi-branch hole) of a natural gas hydrate production well, and provides a strong support for a sand production management system of the natural gas hydrate production well.
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Description

technical field

[0001] The invention belongs to the field of natural gas hydrate exploitation, and relates to the technical direction of evaluating the production capacity decline degree of hydrate wells caused by the clogging of mechanical screen pipes at the bottom of wells during the exploitation of marine hydrates, and specifically relates to a secondary hydrate production method in screen mesh sheets under actual mining conditions. An evaluation system and method for generating blocking laws. Background technique

[0002] There are a large number of natural gas hydrate resources in the surrounding sea areas of my country, and the successful exploitation of natural gas hydrate resources will help improve my country's energy structure. In 2017, my country carried out the first 60-day test production of natural gas hydrate in the muddy silt reservoir in the Shenhu area of ​​the South China Sea, and obtained a cumulative gas production of 309,000 cubic meters, and obtained ...

Claims

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