Experimental device and method for measuring solubility of overflowed gas

Abstract

The invention relates to an experimental device and an experimental method for measuring solubility of overflowed gas. A measuring device comprises a reaction unit and a measuring unit. Core equipment comprises an intermediate container, a high-temperature high-pressure sample preparer, a separation bottle, a gasometer flask and a constant pressure pump. The method comprises the following steps: filling the high-temperature high-pressure sample preparer with a certain amount of drilling fluid; injecting excessive gas into the high-temperature high-pressure sample preparer through the intermediate container; controlling the temperature and pressure of the high-temperature high-pressure sample preparer by means of a heating element and the constant pressure pump; continuously rotating the high-temperature high-pressure sample preparer, wherein gas and the drilling fluid are in full contact; when dissolving balance is achieved, reversing the high-temperature high-pressure sample preparer; taking out a proper amount of dissolved saturated drilling fluid for gas-liquid separation and separately metering the gas volume and the mass of the drilling fluid; and calculating the solubility at the temperature and pressure condition. The device and method provided by the invention have the beneficial effects that a dissolving reaction of the overflowed gas in the drilling fluid in a wellbore flow condition can be simulated, multiple times of measurement can be realized by sample transferring at a single time, and the testing efficiency is increased.

Description

technical field

[0001] The invention relates to the field of oil and gas well engineering safety drilling, in particular to an experimental device and method for measuring the solubility of overflow gas. Background technique

[0002] Well control safety is a key issue in the process of oil and gas exploration and development, which is related to the safety of personnel, equipment and ecological environment in the entire construction operation. The core of well control technology lies in precise wellbore pressure control, that is, using the corresponding flow model to describe the fluid flow behavior in the well, predict the distribution of wellbore pressure, and formulate a reasonable control plan. When overflow occurs during the drilling of oil and gas wells, the intrusive gas exists in two forms in the drilling fluid, namely dissolved gas and free gas. The dynamic distribution of the gas causes a time-varying response of the annular flow state, which in turn leads to compl...

Examples

Embodiment 1

[0040] Adopt the measurement method of described a kind of experimental device of measuring overflow gas solubility, comprise the following steps:

[0041] ① Preparation: Use petroleum ether to clean the pipeline and container, estimate the drilling fluid and gas volume required for a single sample transfer, adjust the position of the piston 17 in the high temperature and high pressure sample preparation device 7, and reserve 200ml of the volume of the reaction chamber 16;

[0042] ② Sample transfer: put 200ml of unweighted oil-based drilling fluid into the reaction chamber 16 of the high-temperature and high-pressure sampler, and measure the drilling fluid density ρ l ;Inject the gas in the gas cylinder 1 into the intermediate container 4 at 10MPa through the booster 3; open the hydraulic oil end valve 8 of the high-temperature and high-pressure sampler, and release 400ml of hydraulic oil; open the valve 5, and inject the gas in the intermediate container 4 The high temperatu...

Embodiment 2

[0051] Adopt the measurement method of described a kind of experimental device of measuring overflow gas solubility, comprise the following steps:

[0052] ① Preparation: Use petroleum ether to clean the pipeline and container, estimate the volume of drilling fluid and gas required for a single sample transfer, adjust the position of the piston 17 in the high-temperature and high-pressure sampler 7, and reserve a reaction chamber volume of 200ml;

[0053] ② Sample transfer: put 200ml of unweighted synthetic base drilling fluid into the reaction chamber 16 of the high temperature and high pressure sampler, and measure the drilling fluid density ρ l ;Inject the gas in the gas cylinder 1 into the intermediate container 4 at 20MPa through the booster 3; open the hydraulic oil end valve 8 of the high-temperature and high-pressure sampler, and release 200ml of hydraulic oil; open the valve 5, and inject the gas in the intermediate container 4 The high temperature and high pressure s...

Embodiment 3

[0062] Adopt the measurement method of described a kind of experimental device of measuring overflow gas solubility, comprise the following steps:

[0063] ① Preparation: Use petroleum ether to clean the pipeline and container, estimate the volume of drilling fluid and gas required for a single sample transfer, adjust the position of the piston 17 in the high-temperature and high-pressure sampler 7, and reserve a reaction chamber volume of 700ml;

[0064] ② Sample transfer: put 700ml of unweighted water-based drilling fluid into the reaction chamber 16 of the high temperature and high pressure sampler, and measure the drilling fluid density ρ l ;Inject the gas in the gas cylinder 1 into the intermediate container 4 at 10MPa through the booster 3; open the hydraulic oil end valve 8 of the high-temperature and high-pressure sampler, and release 210ml of hydraulic oil; open the valve 5, and inject the gas in the intermediate container 4 The high temperature and high pressure samp...

technical field

[0001] The invention relates to the field of oil and gas well engineering safety drilling, in particular to an experimental device and method for measuring the solubility of overflow gas. Background technique

[0002] Well control safety is a key issue in the process of oil and gas exploration and development, which is related to the safety of personnel, equipment and ecological environment in the entire construction operation. The core of well control technology lies in precise wellbore pressure control, that is, using the corresponding flow model to describe the fluid flow behavior in the well, predict the distribution of wellbore pressure, and formulate a reasonable control plan. When overflow occurs during the drilling of oil and gas wells, the intrusive gas exists in two forms in the drilling fluid, namely dissolved gas and free gas. The dynamic distribution of the gas causes a time-varying response of the annular flow state, which in turn leads to compl...

Examples

Embodiment 1

[0040] Adopt the measurement method of described a kind of experimental device of measuring overflow gas solubility, comprise the following steps:

[0041] ① Preparation: Use petroleum ether to clean the pipeline and container, estimate the drilling fluid and gas volume required for a single sample transfer, adjust the position of the piston 17 in the high temperature and high pressure sample preparation device 7, and reserve 200ml of the volume of the reaction chamber 16;

[0042] ② Sample transfer: put 200ml of unweighted oil-based drilling fluid into the reaction chamber 16 of the high-temperature and high-pressure sampler, and measure the drilling fluid density ρ l ;Inject the gas in the gas cylinder 1 into the intermediate container 4 at 10MPa through the booster 3; open the hydraulic oil end valve 8 of the high-temperature and high-pressure sampler, and release 400ml of hydraulic oil; open the valve 5, and inject the gas in the intermediate container 4 The high temperatu...

Embodiment 2

[0051] Adopt the measurement method of described a kind of experimental device of measuring overflow gas solubility, comprise the following steps:

[0052] ① Preparation: Use petroleum ether to clean the pipeline and container, estimate the volume of drilling fluid and gas required for a single sample transfer, adjust the position of the piston 17 in the high-temperature and high-pressure sampler 7, and reserve a reaction chamber volume of 200ml;

[0053] ② Sample transfer: put 200ml of unweighted synthetic base drilling fluid into the reaction chamber 16 of the high temperature and high pressure sampler, and measure the drilling fluid density ρ l ;Inject the gas in the gas cylinder 1 into the intermediate container 4 at 20MPa through the booster 3; open the hydraulic oil end valve 8 of the high-temperature and high-pressure sampler, and release 200ml of hydraulic oil; open the valve 5, and inject the gas in the intermediate container 4 The high temperature and high pressure s...

Embodiment 3

[0062] Adopt the measurement method of described a kind of experimental device of measuring overflow gas solubility, comprise the following steps:

[0063] ① Preparation: Use petroleum ether to clean the pipeline and container, estimate the volume of drilling fluid and gas required for a single sample transfer, adjust the position of the piston 17 in the high-temperature and high-pressure sampler 7, and reserve a reaction chamber volume of 700ml;

[0064] ② Sample transfer: put 700ml of unweighted water-based drilling fluid into the reaction chamber 16 of the high temperature and high pressure sampler, and measure the drilling fluid density ρ l ;Inject the gas in the gas cylinder 1 into the intermediate container 4 at 10MPa through the booster 3; open the hydraulic oil end valve 8 of the high-temperature and high-pressure sampler, and release 210ml of hydraulic oil; open the valve 5, and inject the gas in the intermediate container 4 The high temperature and high pressure samp...

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