A cable for deep well high-speed data transmission system and its application method

Abstract

The invention relates to a cable for a deep well high-speed data transmission system and a using method thereof. When the length of a seven-core cable is larger than 3000 meters, a pair of twisted wires is only allowed to be used for conducting high-speed stable data transmission, namely a seventh core wire and the adjacent core wire are in parallel, and the other six cable cores are in parallel to one another, so that long-line transmission can not be achieved easily. According to the cable for the deep well high-speed data transmission system and the using method thereof, the cable is an armour cable of a seven-cable-core structure and comprises a first core, a second core wire, a third core wire, a fourth core wire, a fifth core wire, a sixth core wire and the seven core wire. The first core wire and the second core wire are twisted to form a first twisted core wire, the fourth core wire and the fifth core wire are twisted to form a second twisted core wire, and the first twisted core wire, the third core wire, the second twisted core wire and the sixth core wire are respectively twisted with the seventh core wire conventionally. According to the cable for the deep well high-speed data transmission system and the using method thereof, two pairs of twisted wires can be simultaneously used for conducting high-speed data transmission, and the deep well data transmission rate can be improved.

Description

technical field [0001] The invention belongs to the technical field of deep well data measurement, and in particular relates to a cable used in a deep well high-speed data transmission system and a using method. Background technique [0002] In the exploration and development of oil and gas, unconventional oil and gas and coalbed methane fields, micro-seismic hydraulic fracturing monitoring and logging technology is a new method of exploration and development. When hydraulic fracturing technology is used to perform high-pressure (about 40MPa) hydraulic fracturing on oil-gas-bearing formations in wells several thousand meters deep, rocks in oil-gas-bearing formations will form larger-scale fracture networks on the basis of natural fractures. When it is opened or closed, tiny natural earthquakes (acoustic emission events) will be generated. Using the downhole high-sensitivity three-component geophone array to receive and locate these micro-seismic events, the shape of the frac...

AI Technical Summary

Problems solved by technology

Its biggest shortcoming is that when the cable length is greater than 3000 meters, only a pair of twisted wires can be used for high-speed and stable data transmission at the same time, that is, the 7th core wire and its adjacent wires, because the 7th core wire and the 1-6 core wires It is a twisted relationship, and the 1st-6th core wires are in a parallel relationship with each other, which is not conducive to long-term transmission

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