Consecutive sand washing type sand production detection system and method

Abstract

The invention discloses a consecutive sand washing type sand production detection system and method. The detection system comprises three subsystems which are namely a down hole circulating sand washing subsystem, a wellhead consecutive circulation subsystem and a wellhead sand production detection subsystem, the down hole circulating sand washing subsystem comprises a leather cup packer, a chokedflow packer and a punching screen pipe, if the down hole screen pipe is damaged, formation sand is flushed into an oil pipe to the wellhead through circulating; the wellhead consecutive circulation subsystem comprises a consecutive sand washing circulating valve, self-sealing blowout preventor, and a wellhead Christmas tree and other components, so that consecutive circulation sand washing when the single oil pipe is running down is realized; and the wellhead sand production detection subsystem comprises a test bent pipe, a signal converter, a signal display and other components, so that thesignal detection of sand particles impacting the test bent pipe in circulating liquid is realized. According to the consecutive sand washing type sand production detection system and method, the real-time detection of the sand production point or the broken position of the screen pipe can be realized through the organic combination of the three subsystems.

Description

technical field [0001] The invention relates to a damage detection technology of an oil well sand control screen pipe in oil exploitation, in particular to a continuous sand washing type sand production detection system and method. Background technique [0002] Sandstone reservoirs are the main reservoirs for oilfield development, and screen sand control or filling sand control are the dominant production techniques for this type of reservoirs. As the development of this type of reservoir enters the middle and later stages, due to the increasingly harsh conditions of the reservoir and well conditions, especially in the long-term production under adverse factors such as high water cut, large liquid production intensity and local large pore seepage, sand control screens are very easy to Local damage leads to failure of oil well sand control. At present, in response to this situation, oil wells usually adopt liquid control to produce with disease, or frequently check pumps to ...

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Problems solved by technology

[0003] After searching keywords such as continuous sand washing and testing, no similar technology was found

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