Detection methods and characteristic analysis of shallow gas in central and southern Bohai Sea

Abstract

Abstract: As a kind of marine geological disaster,shallow seabed gas seriously threatens the stability of the seabed formation,so it is regarded as a key safety factor in the field of marine engineering. By applying acoustic and seismic techniques,several shallow gas-enriched areas have been identified in the central and southern waters of the Bohai Sea. Using conventional geophysical exploration technology and high-resolution digital seismic technology,a comprehensive analysis of the reflection characteristics of shallow gas in the Bozhong and Penglai blocks indicates that faults are the main controlling factor for shallow gas migration. Based on the characteristic,combined with medium-shallow stratigraphic profiles and digital seismic profiles,the formation and migration models of shallow gas in the central and southern Bohai Sea have been initially determined. By discussing the potential threats of shallow gas to drilling operations,offshore platform installation,operation and maintenance,and subsea pipeline facilities,this study provides a reference for shallow gas identification and marine engineering construction.

Key words: central and southern Bohai Sea, shallow gas, seismic detection

CLC Number:

P722.4

LIU Xin, CHEN Guanjun, FENG Xiangzi, LI Yufei. Detection methods and characteristic analysis of shallow gas in central and southern Bohai Sea[J]. TIANJIN SCIENCE & TECHNOLOGY, 2025, 52(11): 37-40+44.

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