A Simulator for Flow in Gas Hydrate Reservoir Near Wellbore
In order to simulate the flow process in the reservoir near wellbore during the gas hydrate exploita-tion,analyze the variation law of the temperature and pressure field around the wellbore under different exploitation parameters and study the spatiotemporal variation law of the secondary hydrate saturation,a test device for simula-ting the flow law of gas hydrate reservoir near wellbore was designed.The device consists of five parts such as data acquisition system,reactor system,vacuum system,high-pressure system and low-temperature and constant tem-perature system.The simulation test results show that the reactor system can simulate 2D radial flow in the reser-voir near wellbore,and can wholly detect the changes in temperature and pressure fields in real time;the vacuum system plays a crucial role in improving the vacuum degree to reduce heat conduction between the reactor and the external environment and achieve zero heat transfer from the outside to the hydrate test system;and this device can effectively simulate the process of material transfer and hydrate phase change in gas hydrate reservoirs near the well-bore during the exploitation process.The research conclusions provide a theoretical basis for the improvement of depressurization exploitation technology for gas hydrates.
gas hydrateflow in reservoir near wellboresimulatorreactorthrottling expansion effect
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