Desanding system based on combustible ice exploitation platform

Abstract

The invention relates to a desanding system based on a combustible ice exploitation platform, and belongs to the technical field of ocean oil and gas resource exploitation. According to the technicalkey points, the system comprises a separating and desanding module, a pressurizing module and a sand washing module; according to the connection relation, a pump outlet of the pressurizing module is connected with a feeding port of the separating and desanding module through a pipeline; and a pump outlet of the sand washing module is connected with a sand washing water port of the separating and desanding module through a pipeline. The system has the advantages of being low in critical separation particle size, short in residence time, small in size, light in weight, small in occupied area, simple in structure, free of moving parts, not liable to break down, low in investment and transportation cost and the like.

Description

technical field [0001] The invention relates to a desanding system based on a combustible ice mining platform, which belongs to the technical field of marine oil and gas resource exploitation. Background technique [0002] Sand production is a phenomenon in which reservoir sand grains migrate out of the reservoir with fluids during oil and gas production. In the process of combustible ice mining, the problem of sand production may be particularly serious, because combustible ice is buried shallowly and the sedimentary layer where it is located is usually unsolidified. Formed rock with high content of fine sand, coupled with large production pressure difference during depressurization mining, resulted in severe sand production at the wellhead. Generally, the harm caused by sand production at the wellhead to the production system is as follows: the sand particles are mixed with the high-speed flow of the fluid, causing erosion and corrosion of the pipeline; the deposition of s...

AI Technical Summary

Problems solved by technology

[0004] Filter desanding is suitable for low sand content and large particle size. If the sand content is too high, the filter will be cleaned too frequently. If the particle size is too small, a filter element with higher precision is required, resulting in excessive pressure drop.

Gravity sedimentation sand removal is suitable for situations with high sand content, but this kind of sedimentation separation takes too long to separate fine sand particles, and the volume of the grit chamber is too large, so it is not suitable for offshore production platforms with limited space

The separation and sand removal of the centrifuge is realized by the centrifugal force generated by the rotation of the liquid driven by the drum. Due to the high-speed rotating parts, dynamic balance and corresponding shock absorption measures need to be considered, which is not conducive to operation and maintenance.

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