高邮凹陷南断阶许庄-竹墩地区断层发育演化和油气成藏

The evolution and development of fault and petroleum accumulation in the south fault zone of Gaoyou Sag, the Xuzhuang-Zhudun Area

杨新明

Yang Xinming

中国石油化工股份有限公司江苏油田分公司开发处, 江苏扬州 225009

The Exploration and Development Department of SINOPEC Jiangsu Oilfield Company, Yangzhou 225009

为了揭示高邮凹陷南断阶许庄-竹墩地区复杂断裂系统的成因、演化与油气成藏的关系,通过对不整合面地层剥蚀量计算、构造演化剖面分析等方法,系统地总结了许庄-竹墩地区断层的发育演化规律。吴堡运动和三垛运动时期是断裂活动最强烈的时期,许庄-竹墩地区的地层受到较强的剥蚀作用。本区主要断层的发育顺序依次为真①断层、纪③断层、真②'断层和真③断层,同一断层在不同的地质时期和平面上的不同位置,发育强度有明显的差异性。断层的活动一方面形成了一系列的断块圈闭,另一方面是油气垂向运移的主要通道,因此在本区形成了一系列的断块圈闭油藏。

In order to reveal the relationship between the development and evolution of complicated fracture system and the formation of reservoir in south fault zone of Gaoyou Sag, Xuzhuang-Zhudun Area, through calculation of the erosion of the unconformable stratum and analysis of the structural evolution profile, the evolutional history of fault in Xuzhuang-Zhudun Area has been summarized systematically.Fault activity was the most intensive during Wubao Movement and Sanduo Movement stage, and the stratum of Xuzhuang-Zhudun suffered from erosion strongly.The development order of the main faults is as follows following:Fault Zhen ①, Fault Ji ③, Fault Zhen ②' and Fault Zhen ②.In different geological period and different planar location, the intensity of fault development is quite different for the same faults.On one hand, the fault activity caused the development of a series of fault blocks;on the other hand, the faults also the main pathways for vertical petroleum migration.Therefore, a series of fault block reservoir formed in this region.

https://doi.org/10.3969/j.issn.1008-2336.2010.02.019