Optical fiber logging data transmission system based on TCP/IP protocol and working method thereof

Abstract

The invention discloses an optical fiber logging data transmission system based on a TCP / IP protocol and a working method thereof, and belongs to the technical field of petroleum and natural gas exploration and development. The system comprises a control and acquisition module, a power supply module, an auxiliary signal measurement module and a photoelectric conversion module which are arranged ona well, a logging torpedo connector arranged under the well, and a photoelectric slip ring and a photoelectric composite cable which are used for connecting the well part and the underground part. Anopen type informatization network logging platform is constructed by applying high-speed optical cable communication and Ethernet bus technologies, transmission of logging operation optical signals is achieved, the logging data transmission rate is increased to 100 Mbps from 1 Mbps, the technical bottleneck of cable data transmission is thoroughly solved, a technical support is provided for research and development of a new generation of array imaging instruments, and the logging data transmission rate is increased to 100 Mbps from 1 Mbps. The measurement precision, the information amount, the image resolution and the logging speed of the instrument are improved, the well occupation time is reduced, the operation risk is reduced, and the production efficiency is improved.

Description

technical field [0001] The invention belongs to the technical field of petroleum and natural gas exploration and development, and in particular relates to an optical fiber logging data transmission system based on the TCP / IP protocol and a working method thereof. Background technique [0002] At present, the well logging data transmission systems of various companies at home and abroad are based on armored cables. The DC resistance of the cable core is about 25 ohms / km, the distributed capacitance is about 0.1uF / km, and the distributed inductance is about 2uF / km when the signal frequency is MHz, so the signal transmission frequency bandwidth of this logging cable is only about 100Hz -100kHz, the cable transmission rate of domestic and foreign logging companies is less than 2Mbps. With the development of well logging technology, new instruments are developing in the direction of signal digitization and arraying of transmitting and receiving probes, so the amount of logging d...

AI Technical Summary

Problems solved by technology

As an information transmission medium, cables limit the data transmission rate between the downhole and the surface, which has long affected the logging speed and restricted the development of modern downhole instrument big data information acquisition technology.

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