Comprehensive evaluation method of natural gas hydrate inhibitor
A technology for comprehensive evaluation of hydrate inhibitors, applied in measuring devices, instruments, scientific instruments, etc., can solve the problems of not being able to reflect the performance of inhibitors more comprehensively, and not be able to reflect changes in the gas-liquid system in detail
Pending Publication Date: 2021-11-05
YANGTZE UNIVERSITY
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Obviously, it cannot reflect the changes of the gas-liquid system in detail, nor can it fully reflect the performance of a certain inhibitor
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[0047] In order to make the object, technical solution and advantages of the present invention more clear, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.
[0048] A comprehensive evaluation method for natural gas hydrate inhibitors, comprising the following steps:
[0049] S1, prepare the hydrate inhibitor evaluation device;
[0050] Such as figure 1 As shown, the hydrate inhibitor evaluation device includes a reaction kettle 7, a methane gas cylinder 1, a pressure regulating valve 2 and a PID valve 3 are connected in sequence and connected to the inlet of the reaction kettle 7 through the PID valve 3, and the agitator of the reaction kettle 7 6 is provided with a torque sensor 5, and the torque sensor 5 is used for recording torque data, and the...
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The invention discloses a comprehensive evaluation method of a natural gas hydrate inhibitor. The method comprises the following steps: S1, preparing a hydrate inhibitor evaluation device; S2, putting the prepared inhibitor solution into a reaction kettle, and turning on a stirrer, when the temperature of the reaction kettle is stabilized to a specified experimental temperature, introducing experimental gas to a specified experimental pressure, observing an experiment phenomenon, and recording system pressure, torque and temperature data in an experiment process by using a data acquisition system; S3, calculating the hydrate generation amount through the pressure data, judging the growth inhibition performance of the hydrate inhibitor, and drawing the torque and temperature data into a relational graph with time, and judging the nucleation inhibition performance of the hydrate inhibitor. According to the invention, the nucleation stage and the growth stage of the hydrate reaction system containing the inhibitor are respectively evaluated by adopting the hydrate generation amount and the torque-temperature change, so that the nucleation inhibition performance and the growth inhibition performance of the hydrate can be relatively comprehensively evaluated, and the excellent hydrate inhibitor can be accurately screened out.
Description
technical field [0001] The invention belongs to the technical field of hydrates, and in particular relates to a comprehensive evaluation method for natural gas hydrate inhibitors. Background technique [0002] Natural gas hydrate is a non-stoichiometric cage-like crystal substance formed by water and methane and other small molecular gases under high pressure and low temperature conditions. Gas hydrate is closely related to oil and gas production and transportation. How to solve the blockage of oil and gas production wellbores, surface treatment devices and pipelines by hydrates has always been a thorny issue. Adding hydrate inhibitors to inhibit the formation of hydrates is an effective method, but there is no unified method for evaluating the effectiveness of hydrate inhibitors. [0003] The performance evaluation of current hydrate inhibitors usually requires the evaluation of induction time to screen out better inhibitors, and then proceed to the next step of experiment...
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IPC IPC(8): G01N33/00
CPCG01N33/00
Inventor 王雷宋志康许文俊叶荣俊李婷婷
Owner YANGTZE UNIVERSITY