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Systems and methods for current leak detection in land seismic systems

A current leakage, terrestrial technology, used in ground resistance measurement, seismic signal processing, seismic signal transmission, etc.

Active Publication Date: 2021-09-17
SCHLUMBERGER TECH LTD BV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The particular problem is the ground leakage between the detector string and the ground in the analog system

Method used

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  • Systems and methods for current leak detection in land seismic systems
  • Systems and methods for current leak detection in land seismic systems
  • Systems and methods for current leak detection in land seismic systems

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Embodiment Construction

[0018] Various embodiments described herein relate to methods, systems, and apparatus for seismic surveying, and more particularly to land seismic surveying systems and current leak detection related thereto. In land seismic surveys, pulsed signals are sent into the ground (often via vibrator vehicles, but sometimes with explosives). The pulsed signal propagates through the earth and reflects and / or bounces off in response to encountering formations. The resulting signal can propagate back to the earth's surface where the signal was detected and be recorded by seismic sensors such as geophones, accelerometers, MEMS and / or hydrophones. The detected signals can be recorded and analyzed to provide information about the underlying formation, such as the presence or absence of hydrocarbons or other minerals. Land systems often include a large number of sensors connected by cables to a central recording station. Power and data are transmitted by means of cables. Embodiments of th...

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Abstract

Embodiments disclosed herein relate to systems and methods for current leak detection in land seismic systems. Embodiments may include generating at least one test signal using a digital-to-analog converter "DAC" circuit, wherein the DAC circuit includes an output operatively connected to ground. Embodiments may also include alternately grounding the positive path to the analog-to-digital converter "ADC" circuit during a first time window and grounding the negative path to the analog-to-digital converter during a second time window while measuring the ADC signal. device. Embodiments may also include determining an average magnitude of the first time window and the second time window, and determining based at least in part on the average magnitude of the first time window and the second time window leakage resistance.

Description

[0001] Cross References to Related Applications [0002] This application claims the benefit of US Provisional Patent Application No. 62 / 308,247, filed March 15, 2016, which is hereby incorporated by reference in its entirety. Background technique [0003] In the oil and gas industry, geophysical exploration techniques are commonly used to aid in the search and evaluation of subsurface hydrocarbon deposits. In general, seismic energy sources are used to generate seismic signals that propagate into the earth and are at least partially reflected by subsurface seismic reflectors (ie, interfaces between subsurface formations having different acoustic impedances). Reflections can be recorded by seismic detectors located at or near the Earth's surface, in a body of water, or at known depths in a borehole, and the resulting seismic data can be processed to generate a correlation between the location of subsurface reflectors and the physical properties of subsurface formations the re...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01V1/28G01R31/52G01R31/3167G01R27/20
CPCG01R27/18G01P15/0802G01R27/20G01R31/3167G01V1/22G01V1/28H01H9/16H03M1/1071
Inventor K·依兰普尔S·约翰逊H·鲍尔森
Owner SCHLUMBERGER TECH LTD BV