洪特凹陷下白垩统的成岩作用

<title>Diagenesis of the Lower Cretaceous strata in the Hongte depression, Erlian Basin

根据二连盆地洪特凹陷20余口井的资料,通过对其偏光及铸体薄片,X衍射,扫描电镜,阴极发光等分析测试,对下白垩统(包括K1ba和K1bt1储层)碎屑岩的成岩历史、成岩序列的发展趋势进行了深入的研究。认为该凹陷所经历的成岩作用主要有压实作用、胶结作用和溶解作用,其次为蚀变作用、交代作用、粘土矿物转化和重结晶作用,烃类充填作用及构造应力作用等。

<Abstrcat> The Hongte depression located in the Erlian Basin is a Mesozoic and Cenozoic fault basin developed on the Hercynian folded basement. The diagenetic history and diagenetic sequences are examined on the basis of thin sections, Xray diffraction, SEM and cathodoluminescence analysis for the samples from more than twenty wells in the depression. The diagenesis in the depression comprises compaction, cementation, solution, alteration, replacement, transformation and recrystallization of clay minerals, filling of hydrocarbons and tectonic stress of the Lower Cretaceous strata including the clastic reservoirs K1bt1 and K1ba .