Device for determining effective transport distance of air foam between wells

Abstract

The invention provides a device for determining the effective transport distance of air foam between wells. The device comprises a foaming device, a fluid device, a formation condition simulating system, pressure sensors, rock core clamps, visual observation systems and a pressure difference data collector, wherein the foaming device is communicated with the fluid device and is accessed to the formation condition simulating system, a plurality of pressure sensors, rock core clamps and visual observation systems which are arranged in a spaced manner are arranged on the formation condition simulating system, the pressure sensors are connected with the pressure difference data collector, and the pressure difference data collector and the visual observation systems are accessed to an information receiving terminal. The provided device for determining the effective transport distance of air foam between the wells is convenient to operate, can be observed in real time, accurately determine the plugging position and calculate the effective transport distance of foam and is high in simulation degree and high in experiment data accuracy.

Description

technical field [0001] The invention relates to an interwell migration device, in particular to a device for measuring the effective migration distance of air bubbles between wells. Background technique [0002] The foam system can selectively seal the pores of the formation, improve the sweep efficiency, increase the elastic energy of the reservoir, and then enhance the oil recovery. In actual mines, the gas and blowing agent system are generally injected into the formation at the same time, and the two are sheared and mixed in the porous medium to form foam, and then play a role. The plugging effect of foam in porous media is affected by the regeneration ability and stability of foam. However, when the minimum flow rate required for foam generation is high, if the foam generated near the wellbore has poor stability and cannot effectively spread to the far well, the effect of foam flooding on enhancing recovery will be reduced. At present, the well site can only rely on t...

AI Technical Summary

Problems solved by technology

However, when the minimum flow rate required for foam generation is high, if the foam generated near the wellbore has poor stability and cannot effectively spread to the far well, the effect of foam flooding on enhancing recovery will be reduced

At present, the well site can only rely on the method of drilling exploratory wells to monitor whether the foam exists at a certain position, and the cost is too high

However, the current laboratory experiments mainly study the resistance factor of continuous foam flooding under oil-free conditions, and the long-distance foam flooding process only uses the indicator of pressure change, which cannot accurately measure the effective migration distance of air foam.

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