Imbibition bottle fluid adding device and method for imbibition experiment

Abstract

The invention discloses an imbibition bottle fluid adding device and method for an imbibition experiment. The imbibition bottle fluid adding device comprises a negative pressure generation system, animbibition bottle and a fluid supply system. The top of a capillary metering tube of the imbibition bottle is connected with the negative pressure generation system, and an inlet of a glass wide-mouthbottle of the imbibition bottle is connected with the fluid supply system. A rock core sample is arranged in the glass wide-mouth bottle, and the capillary metering tube is connected with the glass wide-mouth bottle; and the glass wide-mouth bottle inlet of the imbibition bottle is connected with the fluid supply system. Imbibition liquid in the fluid supply system is pumped into the imbibition bottle by utilizing the negative pressure generation system; the negative pressure generation system stops working when the imbibition bottle is full of the imbibition liquid. The glass wide-mouth bottle inlet and the fluid supply system are separated from a connection portion, a rubber plug is inserted into the glass wide-mouth bottle inlet, and the top of the capillary metering tube and the negative pressure generation system are separated from the connection portion. The experimental result accuracy is improved, the operation difficulty of an imbibition liquid adding link is reduced, the time consumed by the imbibition liquid adding link is shortened, and the experimental efficiency is greatly improved.

Description

technical field [0001] The invention relates to the technical field of indoor simulation experiment equipment in the direction of oil and gas field development engineering in the petroleum industry, in particular to a fluid filling device and method for a wicking bottle used for wicking experiments. Background technique [0002] Spontaneous imbibition refers to the process in which the wetting phase fluid in porous media enters the rock pores spontaneously under the action of capillary force, and displaces and replaces the original non-wetting phase fluid in the rock pores. Imbibition will greatly affect the development effect of low-permeability tight oil reservoirs. Under the current situation that major domestic oilfields generally enter the middle and late stages of development, and low-permeability tight oil reservoirs become the main force for oil and gas production, more and more experts Scholars have begun to study the law of spontaneous imbibition in low-permeabilit...

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Problems solved by technology

[0006] In order to obtain a more accurate measurement result, the diameter of the capillary metering tube is usually designed to be very small, which will cause the permeate injected into the metering tube to drop when using the rubber dropper to drip the permeate into the metering tube from the top opening of the capillary metering tube. The suction will be obviously affected by the gas in the metering tube. The existence of gas in the tube will hinder the downward flow of the permeate. Usually, the permeate dripping into the metering tube is discontinuous, but forms small gaps separated by gas. Compared with the continuous liquid column that runs through the entire inner channel of the metering tube, it is more difficult for the small liquid column to move downward. Even without other auxiliary operations, the small liquid column basically remains still in the metering tube, and continuous extrusion is required. Press the rubber plug on the protruding opening at the bottom of the osmosis bottle to make the small liquid column inside the metering tube move down until it touches the liquid level of the osmosis liquid in the osmosis bottle, while dripping and assisting, repeat the same operation Until the permeate liquid level rises to the top of the metering tube, the whole process is time-consuming and laborious

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