Natural gas hydrate exploitation system and method combined with CO2 gas burying
A natural gas and hydrate technology, which is applied in the fields of mining fluids, other gas emission reduction technologies, earthwork drilling and production, etc., can solve the problems of reducing the risk of natural gas hydrate mining, causing geological disasters, and decreasing formation strength, so as to compensate for the loss of formation pressure , reduce stratum collapse, and achieve the effect of burying
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[0043] Example
[0044] In this example, a natural gas hydrate reservoir in a certain sea area of China is taken as an example to illustrate a combined CO 2 The method for recovering natural gas hydrate by gas sequestration specifically includes the following steps:
[0045] Step 1: According to the characteristics of the natural gas hydrate reservoir in the sea area determined by the previous detection, such as: figure 2 As shown, the figure includes gas hydrate phase equilibrium curve, carbon dioxide hydrate phase equilibrium curve, formation temperature distribution characteristics and formation pressure distribution characteristics. The analysis shows that the area where natural gas hydrate is generated and stably exists is within 500m from the mudline. According to the logging curve data in the sea area, the area with a distance of more than 315m from the mudline is divided into the underlying strata, the area from 205 to 315m from the mudline is divided into natural ...
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