Wireless transmission system and method of water injection well separated layer water injection data based on time window

Abstract

The invention discloses a wireless transmission system and method of water injection well separated layer water injection data based on a time window. The transmission system comprises a wellhead flowmeter, a wellhead pressure gauge and a wellhead intelligent control display, wherein the wellhead flowmeter, the wellhead pressure gauge and the wellhead intelligent control display are arranged on awater injection wellhead, the water injection wellhead communicates with an oil pipe arranged underground, the oil pipe is arranged in a sleeve, a plurality of digital water distributors are sequentially arranged in the oil pipe from top to bottom, and a time window dividing packer is arranged between the outer wall of the oil pipe between the adjacent digital water distributors and the inner wallof the sleeve; and a preset working cylinder, a check valve and a sieve tube are sequentially arranged in the oil pipe below the digital water distributor at the lowest end, a plug is arranged at thebottom end of the oil pipe, and fluid injected from the water injection wellhead enters a stratum after being tested and blended by the digital water distributors. The wireless transmission of separated layer water injection data is realized in the appointed time window, and underground separated layer flow and pressure data are directly read 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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