深海疏松沉积物变形模拟仪器研究
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摘要
疏松沉积物变形构造是指深水沉积砂体受到外界的触发,并在一定条件下形成超压,致使上覆弱渗透性沉积物发生破裂,砂体以流化和液化的形式向周围沉积物侵入。目前可通过露头和地震资料识别了各种疏松沉积物变形构造,然而,对于这些变形构造的形成机制的认识还很有限。设计了一套模拟疏松沉积物变形的实验装置,该装置可模拟砂岩液化、流化、变形、侵入的完整过程,对于探讨非黏结性的层状地层中疏松沉积物的形成机理提供很好的技术支持。
Soft sediment deformation structure are liquefied & fluidized deep water sand bodies,which intrude into the surrounding sediments when the hydraulic fracture occurs under certain overpressure formation conditions and some trigger mechanisms. At present the various soft sediment deformation structures are identified through outcrop and seismic data. However,understanding of the formation mechanism of the deformation structure is still very limited. This paper designed a set of experimental device simulating the deformation of soft sediments,16 parts of the whole device can be successfully show the general processes associated with the development of sandstone injective complexes including elevation of pore pressure,hydro fracture of sealing strata,liquefaction& fluidization and injection of sand. It would provide a good technical support to explore the caking property of layered strata and the formation mechanism of soft sediments.
引文
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