Monitoring system for water injection state of each layer of multi-layer water injection well

Abstract

The invention provides a monitoring system for a water injection state of each layer of a multi-layer water injection well. The system comprises a ground control main machine and a sleeve, wherein a carrier steel pipe cable, cable passing packers and multiple underground water distribution devices are arranged in an inner cavity of the sleeve; the multiple underground water distribution devices are connected with the carrier steel pipe cable and an oil pipe in the sleeve; each underground water distribution device is corresponding to one distribution stratum, and is used for acquiring injection state data of the corresponding distribution stratum in real time; the cable passing packers are connected with the oil pipe, and are packed at the two ends of each underground water distribution device, so that a sealed water injection cavity is formed at each place where an underground water distribution device is situated; the carrier steel pipe cable is used for transmitting the injection state data of each distribution stratum acquired by each underground water distribution device to the ground control main machine in real time; and the ground control main machine is used for storing the injection state data of each distribution stratum. The system can monitor the injection state data of the water injection well in real time for a long time, and prevents the scene monitoring.

Description

technical field [0001] The invention relates to the technical field of oil production engineering in oilfields, in particular to a monitoring system for the water injection state of each layer of a multi-layer water injection well. Background technique [0002] As the oilfield has entered a period of ultra-high water cut, the oil recovery technology of layered oil recovery and layered water injection has been adopted. How to effectively improve the qualified rate of water injection, reduce the workload of on-site construction, and reduce the development cost are the main problems faced by the oilfield. However, in the current conventional testing, the testing instrument is the main body, and the setting of the packer is completed by setting the dead mouth in the well. After the setting is completed, the dead mouth is removed, and then each layer is put into the adjustable The sealing and subsequent flow or pressure test can only be carried out after the plug (regulating valv...

AI Technical Summary

Problems solved by technology

However, as the number of water injection wells increases year by year, and the test cycle is shortened to ensure the pass rate of water injection, the workload of on-site test deployment has increased significantly, and the existing team has been unable to meet the requirements of on-site testing; Water well injection status data cannot assist in the understanding of reservoirs and analysis of potential remaining oil

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