Gravel filling simulation experiment system

Abstract

The invention provides a gravel filling simulation experiment system. The gravel filling simulation experiment system comprises a sand mixing container, a filling simulation device, a sleeve and a cover plate; sand mixing liquid is prepared in the sand mixing container, the filling simulation device comprises a simulation pipe column, the simulation pipe column is provided with a first end and a second end which are opposite in the lengthwise extending direction, the first end communicates with the sand mixing container, the second end is fixedly provided with a filter pipe, the simulation pipe column is provided with a hollow cavity, a partition board is arranged in the hollow cavity, the hollow cavity is divided by the partition board into a first cavity and a second cavity, the second cavity communicates with the filter pipe to form a water draining runner, the sleeve is arranged outside the simulation pipe column in a sleeving manner, the sleeve is provided with a top end and a bottom end which are opposite, the bottom end is closed, the top end is opened, the cover plate is arranged on the top end, the simulation pipe column is in fit connection with the cover plate, a closedannular cavity is formed between the sleeve and the simulation pipe column, and the central axis of the simulation pipe column does not coincide with the central axis of the sleeve. The experiment system can simulate the eccentric state of the pipe column in a well, and is closer to the actual engineering condition.

Description

technical field [0001] The application relates to the technical field of sand control in oil exploitation, in particular to a gravel filling simulation experiment system. Background technique [0002] Sand production in oil and gas wells is one of the important problems encountered in oil exploitation. Sand production in oil and gas wells can easily lead to wear and tear on ground and downhole equipment, and stop production of oil wells, thus increasing the difficulty of oilfield production. At present, gravel or other similar materials are usually used to fill the annular space between the screen and the well wall or casing, and squeeze into the formation around the wellbore. The gravel layer acts as a sand wall and becomes a reliable barrier to prevent sand production from the formation. , to achieve the purpose of controlling the formation of sand. [0003] In the field of gravel packing sand control completion technology, there are still great technical difficulties in ...

AI Technical Summary

Problems solved by technology

In addition, in actual working conditions, the pipe string is often in an eccentric state in the well due to its own weight, which makes the gravel packing unevenly distributed on both sides of the screen, thus affecting the sand control effect

[0004] In the existing technology, the traditional indoor filling simulation experiment device has great limitations, and it is often unable to simulate the real situation in the well such as the eccentricity of the pipe string in the well, and the simulation effect is not good

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