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根据渤海湾盆地构造运动和层序地层学特征,阐述了与不整合面相关的地层圈闭发育和成藏特征。认为新近系与古近系之间和古近系与前新生界之间为两个一级不整合面,前者在凹陷陡坡带主要发育超覆圈闭油气藏,在缓坡带既发育超覆圈闭油气藏,又发育不整合面遮挡油气藏;后者在主要凸起或低突起部位发育潜山油气藏。古近系内部发育3个二级不整合、10个三级不整合,二级不整合面上下均发育地层油气藏;与三级不整合面相关的地层油气藏规模较小,但数量很多,是目前精细勘探的主要目标。通过在济阳坳陷的多年实践,发现了数量可观的上述地层油气藏,为“东部稳产”的能源战略作出了贡献。
According to the tectonic movement and sequence stratigraphy of the Bohai Bay Basin, the stratigraphic traps and reservoir forming characteristics related to the unconformity are expounded. It is considered that there are two first-level unconformities between Neogene and Paleogene and between Paleogene and Pre-Cenozoic. The former mainly develops over-trapping reservoirs in steep sag zone and overlying rift zone Closed reservoirs, but also unconformity occlusion of oil and gas reservoirs; the latter in the main bulge or low protruding parts of the development of buried hill reservoirs. There are three secondary unconformities and 10 third-level unconformities in the Paleogene, and stratigraphic reservoirs are developed above and below the second level unconformity. The stratigraphic reservoirs associated with the third-level unconformity are small in scale but large in number, It is the main target of fine prospecting at present. Through years of practice in the Jiyang Depression, a large number of these reservoirs have been discovered, contributing to the energy strategy of “stabilizing the eastern part of the country.”