Gas Flood EOR

Rising Bubble Apparatus

Manufacturer: Vinci Technologies
Model Number: RBA-700

The RBA test is a reliable and fast way to determine the minimum miscibility pressure (MMP) during a vaporizing gas drive injection study. The method involves direct visual observation of the behaviour of a injected gas bubble rising into a column of reservoir oil. Under miscible conditions, the bubble disappears before it reaches the top; under immiscible conditions, the bubble is visible throughout its flow. The cell is filled with distilled water. Enough oil is injected into the cell to displace all but a short column of water in the cell’s lower end. Next, a small bubble of gas of the desired composition is launched into the water. The buoyant force on the bubble causes it to rise through the column of water, then through the water/oil interface. As the bubble rises through the oil, its shape and motion are observed and photographed with two cameras. Between 3 and 30 seconds are needed for the bubble to rise the length of the oil column. After two or three bubbles have risen through the column of oil, the used oil is replaced with fresh oil. For a gas / oil pair, rising bubble experiments are repeated over a range of pressures. From the pressure dependance of the behaviour of the rising bubbles, MMP is inferred.

Slim-tube System

Manufacturer: Vinci Technologies
Model Number: sts-700

The slim tube apparatus is used to obtain, dynamic miscibility information at reservoir conditions. The gas to be tested is injected at a desired pressure through the slim tube previously cleaned and saturated in oil by means of a high pressure pump. A back pressure regulator maintains a constant pressure inside the system. The effluents flowing from the slim tube can be observed through a capillary sight glass tube. They are then expanded to atmospheric pressure and temperature through a back pressure regulator. The volume of liquid effluents is then monitored continuously using a digital volume measuring detector while the produced gas is measured by a wet gas meter. The recovery curve is then plotted using the raw data obtained during the different miscible displacement experiments. Additional components such as density meter and gas chromatograph may be added to extend the capabilities of the instrument.

EOR Coreflood System for Gas Injection

Manufacturer: Vinci Technologies
Model Number: GASFLOOD

The Gasflood device is a fully automated, modular core flooding system built to evaluate and optimize oil recovery under miscible and immiscible gas injection. The system achieves water flooding, gas flooding and WAG flooding. It measures unsteady state gas and liquid relative permeability, displacement efficiency, residual oil saturation post waterflood and incremental oil recovery and water production as a function of gas injection. It is also compatible for CO2 gas Injection. Horizontal and vertical flooding mechanisms can be studied with the system so as to simulate the gravity drainage. Results are useful for process optimization of gas injection and WAG schemes. It is also an ideal tool to evaluate at reservoir conditions the potential for impairment due to organic solids when depressurizing and blending fluid in situ. Typical configuration of a gasflood system includes injection pump, four fluid transfer vessels, pressure tapped coreholder, forward and backward injection facilities, confining pump, back pressure regulator, airbath, pressure measurement system, fraction collector, wet gasmeter and data acquisition system.