鸭儿峡地区古近系断裂特征与油气成藏模式探讨

Fracture characteristics and hydrocarbon accumulation models of Paleogene in Yaerxia area

为探索酒泉盆地青西—老君庙复杂断裂带油气成藏特征,本文针对鸭儿峡地区古近系断裂发育特征及油气成藏开展了综合研究。通过鸭儿峡地区断裂发育及分布特征研究,明确了断裂与烃源岩分布、构造发育及油气运移的关系,结合区域沉积特征研究及研究区内勘探现状,厘清了该区油气成藏的基本规律,建立了鸭儿峡地区古近系油气成藏模式。基于该区油气成藏规律认识,优选出有利勘探区块。通过本文研究,明确了断裂在鸭儿峡地区油气成藏方面的重要控制作用,探索出一套青西—老君庙复杂断裂带内断块—岩性油藏勘探的方法。

In order to understand oil and gas accumulation characteristics of the Qingxi-Laojunmiao complex fault zone in Jiuquan Basin,we carriy out a comprehensive study of fractures development characteristics and hydrocarbon accumulation in the Paleogene system in Yaerxia area.Through analysis of the fractures development and distribution in Yaerxia area,we conclude a clear relationship between faults and hydrocarbon source rocks,tectonic development and hydrocarbon migration.In combination with regional sedimentary characteristics research and the exploration situation of the study area,we clarify the basic regulation of hydrocarbon accumulation in this area and set up a hydrocarbon accumulation pattern of the Paleogene system in Yaerxia area.Based on the understanding of the hydrocarbon accumulation regularity,we optimize the favorable exploration blocks.Through our work,we clarify the important role of faults in hydrocarbon accumulation in Yaerxia area and propose series of methods for fault-stratigraphic reservoir exploration in complex fault zone of Qingxi-Laojunmiao.