襄城凹陷下第三系含油气系统特征
Features of the Paleogene Oil and Gas Bearing System in the Xiangcheng Sag
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摘要: 襄城凹陷下第三系含油气系统具有早圈闭、晚生油、晚成藏之特征。油气纵向上分布于界首组一舞阳组底部及叶县组上段下部.平面上分布于商桥内外被断裂鼻状构造带及襄部断裂陡坡背科带。北部商桥内斜坎断裂鼻状构造带是本区最有利的油气远景区。Abstract: The Paleogene oil and gas bearing system in the Xiangcheng Sag have the characteristcs that traps formed earlier, oil were generated and pools formed later. Oil and gas distribute vertically in the bottom part of the Jieshou and Wuyang formations and the lower part of the upper Yexian Formation, and horizontally in the Shangqiao inner slope fault-nose structure zone and Xianaiia fault steep slope acticlinal zone with the former being the most favorable prospective area in this region.