Device and method for on-line testing of sulfur solubility in high-sulfur gas reservoirs

Abstract

The invention discloses a high sulfur content gas reservoir sulfur solubility online test apparatus and a test method thereof. The high sulfur content gas reservoir sulfur solubility online test apparatus comprises a dual injection system, a CS2 absorption elemental sulfur system, a stratum environment high temperature and high pressure simulating reaction system, a fluorescence sulfur determining system, a data acquisition system and a cleaning and tail gas treatment system. The test method comprises sulfur-containing gas sample preparation, vacuumizing preparation, stratum high temperature and high pressure environment simulating, elemental sulfur testing, total sulfur metering testing, total sulfur testing after a sulfur dissolution reaction, data acquisition, cleaning and tail gas treatment, and the like. According to the present invention, the solubility data of the gas elemental sulfur in the high temperature and high pressure high sulfur content gas reservoir can be safely, conveniently, accurately and efficiently determined, the foundation is established for the solving of the widespread sulfur deposition problem in the high sulfur content gas reservoir development, and the scientific data support is provided for the making of the reasonable high sulfur content gas reservoir development program.

Description

technical field [0001] The invention relates to the technical field of petroleum and natural gas exploration and development, in particular to an online testing device and method for sulfur solubility in line with the actual development and production of high-sulfur gas reservoirs. Background technique [0002] With the increasing level of gas field exploration, more and more high-sulfur gas reservoirs have been discovered at home and abroad. At present, more than 400 high-sulfur gas fields with industrial value have been discovered in the world, mainly distributed in Canada, the United States, France, Germany, Russia, China and the Middle East. Global reserves of high-sulfur gas reservoirs exceed 736320×10 8 m 3 , accounting for about 40% of the world's total natural gas reserves. During the development of high-sulfur gas reservoirs, it is found that elemental sulfur is a harmful substance in the development of high-sulfur gas reservoirs. With the production of gas wells...

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Problems solved by technology

During the development of high-sulfur gas reservoirs, it is found that elemental sulfur is a harmful substance in the development of high-sulfur gas reservoirs. With the production of gas wells, the formation pressure and temperature continue to decrease along the radial direction, and when the gas flow reaches or exceeds the sulfur saturation At this time, elemental sulfur will be precipitated from the gas flow and deposited in the pores or throats of the reservoir rock, reducing the porosity and permeability of the formation, and in severe cases, the gas well will be shut down or even scrapped

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