车镇凹陷鼻状构造与油气富集的关系

Relationship between nose structures and oil-gas enrichment in Chezhen Sag

在对车镇凹陷鼻状构造的分布、成因机制分析的基础上,结合对生油岩条件和生储盖组合的研究,探讨了区内鼻状构造与油气富集的关系.油气沿鼻状构造的脊线进行运移,在鼻状构造脊线附近的圈闭聚集,而鼻状构造槽线位置的探井油气贫乏,甚至无油气显示.油气受鼻状构造脊线的控制呈放射状分布,受南北断阶带断层的遮挡呈环状分布的规律.这种油气富集规律的研究,对认识我国东部陆相断陷盆地的油气富集规律具有一定的意义.

Based on the analysis of the distribution and geneses of nose structures in Chezhen Sag, as well as the research of oil generating conditions and oil source rock—reservoir rock—cap rock combination, the relationship between nose structures and oil gas enrichment is discussed. Oil and gas migrates along the crestal lines of the nose structures and accumulates in the traps near the crestal lines, but oil and gas lacks in the wells nearby the slot lines of the nose structures. Under the control of the ridges of the nose structures, oil gas distribution zones radiate from the crestal lines and under the control of the faults in the south and north fault zones, oil and gas distributes circularly. The result of the study in the paper can provide help for the recognition of the oil gas distribution laws of the continental faulted basins in the east of our country.