Cross-well electromagnetic measurement time synchronizing system

A time synchronization system and electromagnetic measurement technology, applied in the direction of synchronization, transmission system, synchronization device, etc., can solve the problems of time synchronization error, inability to accurately reflect real-time measurement results, and inability to meet the requirements of interwell electromagnetic measurement, etc., to achieve simple construction, The effect of high timeliness and high precision

Inactive Publication Date: 2014-02-19
CHINA PETROCHEMICAL CORP +1
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  • Abstract
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  • Claims
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Problems solved by technology

[0003] The cross-well measurement is completed by two sets of measurement equipment. Measurement synchronization plays an important role in the accuracy of the measurement results. Based on the conventional time synchronization mechanism of the cable medium, there are time synchronization errors,

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  • Cross-well electromagnetic measurement time synchronizing system

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Embodiment 1

[0013] In conjunction with accompanying drawing, the present invention is further described:

[0014] According to attached figure 1 , the structural design part includes: a time synchronization receiving device 1 , a time synchronization control device 2 , and a power supply and communication interface device 3 . The time synchronization receiving device 1 is composed of a receiving antenna 4 , a receiving module 5 and a time synchronization extraction module 6 . The time synchronization control device 2 is composed of a time synchronization generation module 7 and a time synchronization correction module 8 . The power supply and communication interface device 3 is composed of a power supply module 9 and a communication interface module 10 .

[0015] The ground measurement systems located in the two wells provide low-voltage DC power for the receiving module 5, the time synchronization extraction module 6, the time synchronization generation module 7, the time synchronizati...

Embodiment 2

[0018] The cross-well electromagnetic measurement time synchronization system includes three parts: time synchronization receiving device, time synchronization control device, power supply and communication interface device. The time synchronization receiving device is composed of a receiving antenna, a receiving module, and a time synchronization extraction module; the time synchronization control device is composed of a time synchronization generation module and a correction module; the power supply and communication interface device is composed of a power supply module and a communication interface module. The ground measurement system supplies power to modules such as satellite reception, time synchronization extraction, time synchronization generation, time synchronization correction, and communication interface through the power supply module. The time synchronization device receives the signal from the navigation satellite, and then generates a time synchronization signa...

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Abstract

The invention discloses a cross-well electromagnetic measurement time synchronizing system through a satellite navigation system. According to the technical scheme, the cross-well electromagnetic measurement time synchronizing system is composed of more than two independent electromagnetic measurement time synchronizing devices in a connected mode. Each electromagnetic measurement time synchronizing device comprises a time synchronizing receiving device, a time synchronizing control device and a power supply and communication interface device, wherein the time synchronizing receiving devices are used for receiving signals from a navigation satellite and generating time synchronizing signals through a control device, the time synchronizing signals control the electromagnetic measurement time synchronizing devices to carry out coordination work so as to achieve synchronous measurement of cross-well electromagnetism. Compared with a wired cable synchronizing system, the cross-well electromagnetic measurement time synchronizing system based on the satellite navigation system has the advantages of being easy and convenient to construct, applicable to all weather, good in time effect, high in accuracy and the like. The cross-well electromagnetic measurement time synchronizing system can accomplish synchronous cross-well measurement, and synchronizing precision is lower than 100ns.

Description

technical field [0001] The invention relates to the technical field of cross-well electromagnetic measurement devices, in particular to a time synchronization system for cross-well electromagnetic measurement using a satellite navigation system. Background technique [0002] Conventional well logging technology is suitable for single well measurement and can accurately reflect the formation information near the wellbore, but its detection depth is shallow and it is difficult to reflect the regional formation conditions. In contrast, interwell measurement has a large detection range and can reflect interwell formation information. [0003] The cross-well measurement is completed by two sets of measurement equipment. Measurement synchronization plays an important role in the accuracy of the measurement results. Based on the conventional time synchronization mechanism of the cable medium, there are time synchronization errors, which cannot accurately reflect the real-time measu...

Claims

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Application Information

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IPC IPC(8): H04L7/00G04G7/00E21B49/00
Inventor 臧德福郭红旗晁永胜葛承河沈洪楚
Owner CHINA PETROCHEMICAL CORP
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