High-temperature and high-pressure water-rock reaction and gas permeability integrated testing device and method

Abstract

The invention discloses a high-temperature and high-pressure water-rock reaction and gas permeability integrated testing device. The high-temperature and high-pressure water-rock reaction and gas permeability integrated testing device comprises that the inside of a thermostatic tank is provided with a rock core clamp and a piston container which are connected with each other; one end of a gas booster pump is connected with a nitrogen cylinder, a carbon dioxide cylinder and a sulfurous gas cylinder, and the other end of the gas booster pump is connected with the piston container; a double-cylinder constant-pressure and constant-flow pump is connected with the piston container; both ends of a stratum water sample container are connected with a liquid booster pump and the rock core clamp respectively to fill stratum water samples into the rock core clamp; a confining pressure pump is connected to the lower end of the rock core clamp, and the upper end of the rock core clamp is provided with a confining pressure release pump. The high-temperature and high-pressure water-rock reaction and gas permeability integrated testing device has the advantages of being capable of implementing whole stratum environment simulation, water-rock reaction and rock core gas permeability measurement within one integrated testing device, conveniently, accurately, safely and effectively measuring the change of physical properties of rock before and after water-rock reaction at high-temperature and high-pressure, and providing more data and technical support for practical production.

Description

technical field [0001] The invention relates to the field of oil and gas field development, in particular to an integrated testing device and method for high temperature and high pressure water-rock reaction and gas permeability. Background technique [0002] With the continuous improvement of oil recovery requirements in oilfield exploitation, the research work on enhanced oil and gas recovery has always been the top priority. In recent years, carbon dioxide displacement has developed rapidly. When carbon dioxide is injected into the ground, it is very easy to react with formation water and rocks in the surrounding reservoirs, thus breaking the physical and chemical balance between formation water and surrounding rocks. At the same time, the sour gas reservoirs are widely distributed all over the world, so the research on the exploitation of sour gas reservoirs has received extensive attention and attention. Recent research results also pointed out that after injection of ...

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Problems solved by technology

[0003] At present, most of the experimental simulation studies of water-rock reaction are carried out under normal temperature and pressure environment, which do not meet the requirements of the actual formation environment, and the conclusions drawn are not suitable for production practice

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