Shale gas remote gas production monitoring and ground pipeline corrosion preventing system and method

Abstract

The invention belongs to the technical field of shale gas production and discloses a shale gas remote gas production monitoring and ground pipeline corrosion preventing system and method. The system comprises a dust reducing and water removing device which is fixedly mounted at a wellhead of a shale gas well and communicated with a gas flow collection device through a delivery pipeline, the gas flow collection device is connected with an instrument parameter monitoring device through a data line, the delivery pipeline is communicated with a preservative injection device, a high-pressure spraying device is arranged inside the preservative injection device which is communicated with a preservative detection device through the delivery pipeline, and the preservative detection device is arranged at a joint of the tail end of the delivery pipeline and a combination station gathering and delivering treatment device. The system is small in size and compact in structure; a skid-mounted mode isadopted, and a standard flange, a wellhead and a pipeline are connected, so that the system is simple, convenient and quick in mounting. An anti-explosion prototype is adopted for each device part, and isolation and anti-explosion treatment are performed on power use and a signal transmission cable, so that the system is high in safety and reliability.

Description

technical field [0001] The invention belongs to the technical field of shale gas exploitation, and in particular relates to a shale gas remote gas production monitoring and surface pipeline anticorrosion system and method. Background technique [0002] At present, the commonly used existing technologies in the industry are as follows: With the development of shale gas projects, how to safely, efficiently and sustainably recover gas has become an important research direction. Shale gas sampling and analysis show that in shale gas CO 2 Partial pressure exceeds CO 2 The critical value of corrosion to metal, so the pipeline will be greatly corroded in the process of shale gas gathering, transportation and exploitation. However, at present, gas production pipelines and surface gathering and transportation pipelines usually use sulfur-resistant pipes, and there is no anti-CO2 2 Hydrate corroded tubing, so for CO 2 Corrosion cannot be solved by relying on the anti-corrosion abil...

AI Technical Summary

Problems solved by technology

[0004] (1) At present, gas production pipelines and ground gathering and transportation pipelines usually use sulfur-proof pipes, and there is no CO2-proof pipe. 2 Hydrate corroded tubing, so for CO 2 Corrosion cannot be solved by relying on the anti-corrosion ability of the pipe. At the same time, the anti-corrosion of open anti-corrosion agent injection currently used does not have a real-time concentration monitoring and anti-corrosion evaluation method. On the one hand, it causes waste of excessive injection of anti-corrosion agent. On the one hand, it causes corrosion caused by insufficient amount of preservatives. Therefore, in the process of shale gas gathering, transportation and exploitation, there is an urgent need for a CO 2 Corrosion preservative injection and monitoring device

[0005] (2) So far, there is no real-time monitoring measure for gas well water flooding, which can only be measured manually. Manual measurement can only be carried out together with gas sampling, and it can only be measured once in a while, which may be missed Best Time to Drain Water to Prevent Gas Well Flooding

[0006] (3) Gas wells will have H during production 2 Toxic and harmful gases such as S are produced together, once H 2 Toxic and harmful gases such as S leak from pipeline ruptures, which will cause very large casualties and property losses. At present, there is no one that can effectively prevent pipelines from being damaged by CO in the process of gas field development. 2 Efficient measures for damage caused by corrosion and monitoring of gas leaks

[0008] At present, there are still no effective devices and measures to solve the above problems. Therefore, in order to solve the above problems, there is an urgent need for a device that can detect the specific components of the gas in real time, evaluate the production status of the gas well, and monitor the water output of the gas well in real time. liquefy and inject preservatives, and monitor the concentration of preservatives in the pipeline to avoid or reduce corrosion

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