Efficient prevention and control agent and process for solving low-temperature freezing blockage of natural gas production pipeline

Abstract

The invention provides an efficient prevention and control agent and process for solving low-temperature freezing blockage of a natural gas production pipeline, and the prevention and control agent is mainly prepared from the following raw materials by mass: 10-25 parts of a composite hydrate inhibitor, 5-8 parts of an anti-agglomerant, 2-5 parts of a synergist, 0.5-2 parts of a corrosion inhibitor, 0.5-1 part of a scale inhibitor, 1-2 parts of a chelating agent, 15-20 parts of an accelerant and 0.01-0.02 part of a defoaming agent; wherein the composite hydrate inhibitor comprises a thermodynamic inhibitor and a kinetic inhibitor, and the mass ratio of the thermodynamic inhibitor to the kinetic inhibitor is 2:8-4:6; the thermodynamic inhibitor comprises a polybasic organic alcohol and an inorganic salt, and the kinetic inhibitor comprises a terpolymer, an organic salt and an imine polymer. The prevention and control agent disclosed by the invention is used for protecting and preventing the whole production process of a natural gas well, and effectively controlling the freezing blockage of natural gas hydrates and produced water in a low-temperature environment in winter.

Description

technical field [0001] The invention relates to the technical field of prevention and control agents, in particular to a high-efficiency prevention and control agent and a process for solving low-temperature freezing blockage of natural gas production pipelines. Background technique [0002] In natural gas well production and gathering pipelines, low-molecular-weight hydrocarbons, hydrogen sulfide, carbon dioxide and other gases and water in pipelines will form hydrates under certain temperature and pressure conditions, which will reduce the gas flow channel in light cases, and in severe cases It will lead to blockage of pipelines or equipment, thereby blocking pipelines, seriously restricting the development of gas wells, and affecting safe and efficient production. From the actual experience in Daqing Oilfield, Xinjiang Oilfield, Qinghai Oilfield, etc., it can be known that factors such as changes in gas pressure, eddy currents caused by changes in gas flow direction, poss...

AI Technical Summary

Problems solved by technology

[0002] In natural gas well production and gathering pipelines, low-molecular-weight hydrocarbons, hydrogen sulfide, carbon dioxide and other gases and water in pipelines will form hydrates under certain temperature and pressure conditions, which will reduce the gas flow channel in light cases, and in severe cases It will lead to blockage of pipelines or equipment, thereby blocking pipelines, seriously restricting the development of gas wells, and affecting safe and efficient production