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Issue:ISSN 1006-5539
          CN 51-1183/TE

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    Your Position :Home->Past Journals Catalog->2024 Vol.1

    Application of multi-information fusion technique in imaging of complex tectonic belt
    Author of the article:SUN Bo, YIN Xuebin, GUO Xiang, LIU Hongyan, LU Jiaqi, WEI Hao, NIE Zhiwei
    Author's Workplace:Urumqi Branch, Geophysical Research Institute, BGP, CNPC, Urumqi, Xinjiang, 830016, China
    Key Words:Double complexity; Geological outcrop; Conglomerate characterization; Velocity modeling; Forward modeling
    Abstract:

    The Tectonic Belt of Flaming Mountain, situated in the Turpan-Hami Basin, is an east-west-oriented belt controlled by thrust faults that have emerged from the Late Yanshan-Himalayan orogeny. This region is characterized by significant surface undulations and a complex structural composition. Near-surface faults exhibit steep inclines, accompanied by abrupt velocity transitions on either side, contributing to a multifaceted subsurface geology. These double complex geological attributes result in a reduced signal-to-noise ratio and compromised imaging quality. Consequently, seismic datas depth migration and positioning become less accurate, hindering precise determination of subsurface structures. Such challenges severely impede seismic exploration and comprehensive geological studies within the area. To enhance the seismic datas signal-to-noise ratio and imaging clarity in the study zone, this paper initiates the approach by applying the theory of fault-related folding to guide the determination of structural styles through meticulous interpretation of geological outcrop data. Following this, an in-depth characterization of the shallow surface conglomerate is performed to ascertain the extent of shallow velocity anomalies, using the boundaries of conglomerates flanking the Flaming Mountain to inform a shallow surface velocity model. Subsequently, an examination of the drilling and logging data facilitates a thorough analysis of the velocity variations patterns, both vertically and horizontally, in the deep layers, culminating in the development of a comprehensive velocity model. The fourth phase involves utilizing this velocity model for forward simulation, with multiple iterations of verification to achieve maximum alignment between the simulation profiles and seismic data, thus acquiring an approximation closest to the real structure. The integration of multi-information fusion interpretation technology has substantially refined the imaging quality of seismic data in the Flaming Mountain area. This advancement not only lays the groundwork for further oil and gas exploration but also provides a technical reference for processing and interpretation in regions with similarly complex structural features.

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