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以垦利3-2构造为例,通过断层断距统计半定量分析了该构造区新近系断层活动规律,系统研究了断层活动、砂体发育对油气成藏的控制作用。断层活动时间与储盖组合“耦合”控制了油气垂向聚集层位,断层活动强度与砂体发育展布“耦合”控制了油气平面分布,边界断层应力调节带是油气聚集的优势区带。在断裂-砂体的控制下,新近系主要含油层段明下段形成了油气富集程度高的岩性-构造油气藏和构造-岩性油气藏。
Taking Kenli 3-2 structure as an example, the activity law of the Neogene faults in the tectonic area was semi-quantitatively analyzed through the statistics of fault discontinuities, and the control action of fault activity and sand body on hydrocarbon accumulation was studied systematically. Fault activity time and reservoir-cap assemblage “coupling ” controlled vertical accumulation of oil and gas, fault activity intensity and distribution of sand body development “coupling ” controlled the oil-gas plane distribution, boundary fault stress-regulation zone was hydrocarbon accumulation Advantage zone. Under the control of fault-sand body, lithologic-structural reservoirs and tectonic-lithologic reservoirs with high degree of hydrocarbon accumulation are formed in the lower part of the Neogene main oil-bearing section.