T/CSOE 0002-2024 Active Group standards

T/CSOE 0002-2024 The protocol for data acquisition of distributed optical fiber acoustic wave sensors in a well

Publish Date: 2024-08-09 Implement Date: 2024-08-14 For services related to genuine standard inquiry, procurement, translation, and other related services in China, please Contact Us

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Basic Information

Standard Code: T/CSOE 0002-2024

Standard Type: Group standards

Standard Status: Active

is_force_gb: no

CCS Name: -

ICS Name: Other standards related to optics and optical measurement

Publish Date: 2024-08-09

Implement Date: 2024-08-14

Scope

Scope: This document specifies the data acquisition procedures for distributed fiber optic acoustic sensing in wells. The procedures stipulate requirements for the acquisition process, task determination, geological tasks, data collection, site surveys, parameter design, testing, construction design, construction preparation, pre-construction trial acquisition, project acceptance, data acquisition, acquisition validation, and data archiving. This document applies to data acquisition using distributed fiber optic acoustic sensing in wells. Main technical content: - Distributed fiber optic acoustic sensing (DAS): An instrument that uses the phase changes of Rayleigh scattering light at various spatial positions in the fiber caused by vibrations to achieve phase demodulation and detect seismic/acoustic waves in the fiber as a medium. - DAS data acquisition: Acquires seismic or sound information along the cable extension direction using DAS instruments. - Vertical seismic profiling (VSP): A method of exploring by generating seismic waves near the surface and receiving them at different depths in the wellbore. - Note: Vertical seismic profiling is also known as VSP. - DAS Zero-offset VSP: A seismic exploration method where the source excitation point is located within 150m of the wellhead and DAS is used for reception. - Note: DAS Zero-offset VSP is also known as Zero-offset VSP. - DAS Walkaway VSP: A seismic exploration method where a series of excitation points are arranged along the wellbore and DAS is used for reception. - Note: DAS Walkaway VSP is also known as Walkaway VSP. - DAS Walkaround VSP: A seismic exploration method where the source excitation point is sequentially moved around the observation well at different azimuths while maintaining a fixed distance from the wellhead, and DAS is used for reception in the well. - 3D VSP: A seismic exploration method where the source excitation points are located within a certain range around the observation well and a