排序方式： 共有3条查询结果，搜索用时 0 毫秒
1
1.
2.
以该盆地中心16区块为例，分析了其构造-沉积发育史及石油地质要素。研究表明该区前白垩系为断陷-裂陷盆地，白垩系为稳定的被动大陆边缘，新生界为前陆盆地。将主要目的层白垩系划分析5个层序，主要是河流-受潮汐控制的河口湾、三角洲-大陆架沉积，海平面相对升降变化决定了沉积体系的时空演化进而决定生储盖配置。含油气系统主力烃源岩为白垩系浅海相泥页及灰岩。产层为白垩系的河流相、海陆交替相和海相砂岩（NAPO组和HOLLIN组），其中，HOLLIN组和M段为低位期底积层，分布广泛，为主要侧向运移输导层。海陆交替相的潮汐水道砂一滨岸砂坝-障壁砂坝为主要储层，断层控制水道砂岩分布，来自断层的烃类与厚层优质砂岩及浅海泥岩、泥灰岩形成良好生储盖配置，斜坡带走滑断层和山前带逆冲断层为垂向输导层。盖层（亦为烃源岩层）为白垩系各旋回海侵期页岩或（泥）灰岩，稳定，封盖性好。晚白垩纪-渐新世（早安第斯期）为生排烃高峰期，中新世以后形成的圈闭不利于捕集油气。 相似文献
3.
Thierry Adatte Wolfgang Stinnesbeck Jürgen Remane Hans Hubberten 《Cretaceous Research》1996,17(6):671-689
Mexico is usually considered to have formed the western end of the Tethys during Late Jurassic and Early Cretaceous times. The circumstances of the opening of the Gulf of Mexico Basin towards the Tethys and the exact stratigraphic timing, however, are not clear. Four sections covering this time interval, located in northeastern Mexico, have been measured and sampled in detail, in order to clarify their stratigraphic position during the Late Jurassic to Early Cretaceous time interval and the paleogeographic and oceanographic changes that accompanied this opening. Our studies include microfacies, micro- and macropaleontology, whole rock and clay-mineral x-ray diffraction and stable isotopes analyses. Our data indicate that the Jurassic-Cretaceous boundary, as defined by the Lyon-Neuchâtel Colloquium of 1973, cannot be determined precisely in northeastern Mexico due to the near-absence of calpionellids and endemism of ammonite taxa. In the lower and upper Berriasian sediments, we detected Mediterranean ammonite taxa so far unknown from Mexico, corresponding to the appearance of typical calpionellid-rich facies. These faunas allow direct biostratigraphic correlation with European ammonite and calpionellid zones.We propose that a major oceanographic change occurred in the upper part of calpionellid Zone B of the Early Berriasian. At this time, sediments in northeastern Mexico present increasingly pelagic facies, a dramatic appearance of Tethyan microfossils (calpionellids) and ammonites, changes in stable isotopic values, whole rock and clay-mineral mineralogy. We suggest that these changes are due to a global sea-level rise that connected directly northeastern Mexico to the European Tethys and ended the endemic, semi-restricted and anoxic environment of the Late Jurassic La Casita and equivalent La Caja and La Pimienta Formations. 相似文献
1