A wireless transmission system and method for layered water injection data of water injection wells based on time window

Abstract

A time window-based wireless transmission system and method for layered water injection data of water injection wells. The transmission system includes a wellhead flowmeter, a wellhead pressure gauge, and a wellhead intelligent control display installed at the water injection wellhead. In the sleeve, multiple digital water distributors are arranged in sequence from top to bottom inside the tubing, and time window dividing packers are set between the outer wall of the tubing and the inner wall of the sleeve between adjacent digital water distributors ;The inside of the oil pipe is provided with a preset mandrel, a check valve and a screen in sequence below the bottom digital water distributor, and a plug is installed at the bottom of the oil pipe. into the strata. The invention realizes the wireless transmission of layered water injection data within the agreed time window, and realizes the direct reading of downhole layered flow and pressure data on the ground.

Description

technical field [0001] The invention relates to the field of water injection of oil and gas wells, in particular to a time window-based wireless transmission system and method for layered water injection data of water injection wells, which can realize wireless transmission of downhole data of water injection wells and ground display of real-time data. Background technique [0002] Oilfield water injection development has entered the intelligent stage. The downhole intelligent water distributor is used to test and adjust the downhole flow rate of the injection well, and collect downhole flow and pressure data. The data collected downhole is generally stored in the water distributor. To obtain these data on the ground, the logging vehicle needs to be lowered to read the measuring and adjusting instrument, or the wave code signal generated by pressure fluctuations is used to transmit the ground and downhole data. However, there is a long historical cycle of downhole data to re...

AI Technical Summary

Problems solved by technology

However, there is a long historical cycle of downhole data to read data with measuring and adjusting instruments, and it cannot be obtained in time. The water distributor actively forms a weak pressure fluctuation signal, the ground is not easy to detect, the bit error rate is high, the coding and decoding cycle is long, and the labor cost is high.

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