Method for researching sulfur deposition pore network model of high-sulfur-content gas reservoir

Abstract

The invention relates to a method for researching a sulfur deposition pore network model of a high-sulfur-content gas reservoir, and belongs to the technical field of high-sulfur-content gas reservoirdevelopment. The problem that a high-sulfur-content gas reservoir sulfur deposition numerical simulation method is lacked at present is solved. According to the technical scheme, based on pore throatstructure parameters and basic properties of sulfur, the pore throat structure parameters and the basic properties of sulfur serve as input conditions of a pore network model, and a random function is adopted for randomly distributing the tube bundle radius to achieve a heterogeneous random network model; a percolation theory is utilized to control connectivity, coordination number and pore structure size of a network model through connectivity probability so as to study sulfur seepage and deposition rules, a pressure matrix equation is established and solved by adopting a hydroelectric similarity principle, pressure field distribution of the pore network model is obtained, and finally the pore network model is established, and the seepage and deposition rules of the sulfur in the high-sulfur-content gas reservoir is researched. The pore network model is innovatively used for simulating sulfur deposition of the high-sulfur-content gas reservoir, the simulation effect is good, and thegeneralizability is high.

Description

technical field [0001] The invention relates to a research method for a pore network model of sulfur deposition in a high-sulfur gas reservoir, belonging to the technical field of high-sulfur gas reservoir development. Background technique [0002] The proven reserves of high-sulfur natural gas in the Sichuan Basin exceed 9000×10 8 m 3 , accounting for more than 90% of the same kind of natural gas reserves in the country. As the main battlefield for the development of high-sulfur natural gas in China, the Sichuan Basin has a history of nearly 47 years of development of high-sulfur gas reservoirs, and has accumulated rich development results and technical experience. At the same time, "going out" to support overseas natural gas cooperative development represents It is the highest level of high-sulfur gas reservoir development in my country and leads the technical development direction of high-sulfur gas reservoir development in China. [0003] At present, in the development...

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Problems solved by technology

[0005] Generally speaking, there are many studies on sulfur deposition in high-sulfur gas reservoirs, but they are still at the stage of theoretical research and physical experiment simulation, and there are no reports on numerical simulation of sulfur deposition in high-sulfur gas reservoirs using pore network models

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