Simulation experiment device and experiment method of non-hydrocarbon gas and steam wellbore state

Abstract

The invention provides a nonhydrocarbon gas and steam shaft state simulating experiment device. The device comprises a seal kettle, a nonhydrocarbon gas injection system, a steam injection system, a drain water receiver and an exhaust gas receiver; a chamber is formed in the seal kettle, and the seal kettle is provided with a heating device for heating the chamber; a temperature probe and a pressure probe are arranged in the chamber; the nonhydrocarbon gas injection system and the steam injection system are connected with the seal kettle through pipelines; the drain water receiver and the exhaust gas receiver are connected with the seal kettle through pipelines. The invention further provides an experiment method, dynamic conditions for injecting nonhydrocarbon gas and steam into a shaft can be dynamically simulated, and objective condition changes caused by the conditions such as reaction consumption and system heat loss in the seal kettle under the actual dynamic condition are simulated. A measurable processing system accurately simulates state parameters such as the temperature, the pressure, the gas composition and the dryness degree of any one point in the shaft through corresponding monitor and calculation simulating.

Description

technical field [0001] The invention relates to a simulation experiment of a steam flooding development method for a heavy oil reservoir, in particular to a simulation experiment device and an experiment method for the state of a non-hydrocarbon gas and steam wellbore. Background technique [0002] Due to the high viscosity and difficult flow of crude oil in heavy oil reservoirs, steam flooding thermal recovery is still an effective means to develop heavy oil reservoirs. However, with the deepening of steam flooding production in recent years, most of the main heavy oil The rising momentum of block output gradually slowed down and began to decrease in stages. In order to reduce the cost of steam flooding development as much as possible, the use of non-hydrocarbons to replace part of steam and assist steam flooding was explored for thermal recovery tests. Non-hydrocarbon gases mainly refer to CO 2 , N 2 Other gases (air can be used), non-hydrocarbon gases and steam are mix...

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Problems solved by technology

[0004] 1. The conventional steam surface simulator can only simulate the static physical environment. If air and water are injected at the same time, the three-phase ratio of steam, gas and water in the container cannot be grasped, and it is difficult to simulate the dynamic environment in the well;

[0005] 2. Due to the addition of air and other non-hydrocarbon gases to the injection medium, the environment in the wellbore has changed, and the original steam dryness measurement device cannot accurately simulate and control parameters such as the dryness in the wellbore

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