A device and method for measuring adsorbed sulfur content based on the principle of solvent dissolution

Abstract

A device for measuring adsorbed sulfur content based on the principle of solvent dissolution, including a high-temperature and high-pressure pump, a high-temperature and high-pressure sulfur-resistant reactor, a valve, a constant-speed and constant-pressure pump, a solvent container, a high-temperature and high-pressure core holder, a simulated core, and a back pressure valve; The high temperature and high pressure core holder is equipped with a simulated core, the high temperature and high pressure anti-sulfur reaction kettle and the solvent container are connected in parallel to one end of the high temperature and high pressure core holder through branch pipelines, and the back pressure valve pipeline is connected to the other end of the high temperature and high pressure core holder High temperature and high pressure anti-sulfur reaction kettle and solvent container are connected to high temperature and high pressure rock core holder on the pipeline that is respectively provided with high temperature and high pressure pump, constant speed and constant pressure pump, valve; By displacing the elemental sulfur that has not been adsorbed by the core, an evaluation test process for the maximum adsorption capacity of sulfur fixation in the reservoir and the range of damage caused by sulfur fixation to the reservoir has been established. It provides a reference for the development of sulfur gas fields.

Description

technical field [0001] The invention belongs to the technical field of exploration and development of high-sulfur natural gas reservoirs, in particular to a device and method for measuring adsorbed sulfur content based on the principle of solvent dissolution. Background technique [0002] my country's sulfur-containing gas reservoirs are mainly distributed in the Ordos Basin, Tarim Basin, and Sichuan Basin. The main characteristics of this type of gas reservoirs are: deep gas reservoir burial, high hydrogen sulfide content, and large geothermal gradient. During the process, as the gas continues to be produced and the formation pressure continues to drop, elemental sulfur will be precipitated from the gas, which will block the natural gas seepage channel, reduce the effective pore space and permeability of the formation, and affect the productivity of the gas well. It can be seen that the research on the formation sulfur deposition model is very necessary. [0003] When sulfu...

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Problems solved by technology

However, at present, the understanding of the adsorption capacity of the reservoir for sulfur fixation and the extent of damage to the reservoir by sulfur fixation is still quite limited, and there are few studies on the adsorption of sulfur fixation in the reservoir, and there is a lack of quantified reservoirs. The experimental data of the sulfur-fixed adsorption capacity; and the clarification of the adsorption of sulfur-fixed in porous media and the grasp of the maximum adsorption capacity of the formation for sulfur-fixed can provide an important experimental basis for the prevention and control of sulfur deposition. Therefore, a method that can simulate the actual Formation conditions, and an experimental device for studying the maximum adsorption capacity of the formation for sulfur fixation and the extent of damage to the reservoir by sulfur fixation

[0004] In addition, in the current common experimental devices for sulfur deposition, the core samples are mostly displaced by sulfur-containing gas to obtain the deposition results of sulfur in the core in the core. In general, the elemental sulfur carried by the gas is difficult to be fully introduced into the pores, so that the adsorption of sulfur fixation in the simulated formation cannot reach saturation, and it is difficult to realize the study of the maximum adsorption capacity of sulfur fixation in the formation

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