非零偏时延VSP资料处理关键技术

doi:10.11720/wtyht.2024.1161

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Abstract

Since non-zero-offset time-lapse vertical seismic profiling (VSP) data contain abundant near-well wave field information,the VSP reflection information and seismic attributes can be applied to effectively monitor the migration of injected fluids near wells,boasting a broad application prospect.Due to the limitation of observation methods,non-zero-offset time-lapse VSP data exhibit limited superposition times,thus demanding more stringent processing for two-phase VSP data.By introducing the repeatability analysis and consistency processing method of two-phase data into the conventional processing technology for non-zero-offset VSP data,this study developed a processing technology flow for non-zero offset time-lapse VSP data.Moreover,this study conducted analysis and tests of the methods for processing the intra-shot consistency of time-lapse data and the consistency of two-phase data.As verified by the application in well A,the processing flow and key technology for non-zero-offset time-lapse VSP data proposed in this study enjoy high operability and practicability and,thus,have the potential for wide applications.

Key words： non-zero-offset time-lapse VSP data processing consistency processing attribute analysis

Received: 23 April 2023 Published: 16 April 2024

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	Articles by authors
	Jie ZHANG
	Lei-Lei CHENG
	Zhao-Han ZENG
	Lin CHEN

Cite this article:

Jie ZHANG,Lei-Lei CHENG,Zhao-Han ZENG, et al. Key technologies of non-zero offset time-delay VSP data processing[J]. Geophysical and Geochemical Exploration, 2024, 48(2): 470-478.

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https://www.wutanyuhuatan.com/EN/10.11720/wtyht.2024.1161 OR https://www.wutanyuhuatan.com/EN/Y2024/V48/I2/470

VSP seismic acquisition diagram

Three-component detector acquisition diagram

Non-zero offset time-delay VSP data processing flow

Source wavelet inconsistent single shot recording

Consistency processing with 610~840 m as the standard channel

Consistency processing with 850~1 080 m as the standard channel

Radial VSP component of phase I

Radial VSP component of phase Ⅱ

Radial VSP component of phase Ⅱ after consistency treatment

VSPCDP overlay imaging of phase Ⅰ

VSPCDP overlay imaging of phase Ⅱ after consistency treatment

Basic geological attributes and geological significance

The difference section of phaseⅠ and phase Ⅱ

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