The forecasting of natural gas hydrate by using P-T figure method in gas well | |
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( Volume 2 Issue 5,May 2016 ) OPEN ACCESS | |
Author(s): | |
Qiang Fan, Songtao Jiu, Guojing Gui, Shuai Yang | |
Abstract: | |
Natural gas hydrate is crystalline clathrate compound. It’s formed by water and natural gas at low temperatures and high pressure. In the process of gas well’s production, it has the potential to form hydrate crystal layer and adhere to the pipe wall, even block the entire pipeline. Considering the coupling of temperature and pressure, this paper calculates the distribution of temperature and pressure in tube from the bottom by way of the point-to-point iteration, and then identifies whether the hydrate was generated with the point-to-point discrimination by using the P-T figure method. Through example, we know that the wellbore pressure and temperature coupling algorithm and P-T figure method are easy to use, and the result is precision enough. It can be used to analysis and calculation the production wells and test wells’s distribution of pressure and temperature and hydrate formation prediction, it can be satisfied the engineering requirement. |
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