Experimental apparatus for studying gas invasion and migration mechanism in oil and gas wellbores
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United States of America Patent
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Apr 4, 2017
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app pub date -
Oct 13, 2016
filing date -
Sep 8, 2016
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Abstract
The present invention provides an experimental apparatus for studying the gas invasion and migration mechanism in oil and gas wellbores, comprising: a wellbore; a wellbore pressure control unit, configured to control the pressure in the wellbore; a drilling fluid injection and discharge unit, configured to control the volume of a drilling fluid in the wellbore; a temperature control unit, configured to control the temperature in the wellbore; a rock core clamper, configured to clamp a rock core in a way that one side of the rock core is exposed to the drilling fluid in the wellbore; a gas invasion unit, configured to inject a gas into the rock core; and a measuring device, configured to measure the data related to one or more of the following items in the wellbore: gas bubble migration velocity, diffusion concentration and particle size distribution, gas bubble merging process, hydrate phase transition process, and migration velocity, diffusion concentration and particle size distribution of hydrate after phase transition.
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