鄂尔多斯盆地三叠系延长组长7油页岩特征与页岩气资源潜力研究  

Distribution Characteristics of the Triassic Yanchang Formation Chang 7 Member Oil Shale and Resource Potential of Shale Gas,Ordos Basin

作　　者：张惠[1,2] 孟祥振[3] 

机构地区：[1]西北大学地质学系,陕西西安710069 [2]西安石油大学地球科学与工程学院,陕西西安710065 [3]延长油田股份有限公司,陕西延安717111

出　　处：《地下水》2013年第2期93-96,共4页Ground water

摘　　要：鄂尔多斯盆地三叠系延长组长7油页岩,主要分布在盆地南部,单层厚度10～30 m(最厚处超过50m),试气证实具有一定产气能力。延长组沉积时是鄂尔多斯盆地发育的鼎盛时期,长7期湖盆范围达到最大。通过对长7油页岩分布与沉积相展布关系的研究,认为鄂尔多斯盆地油页岩的分布受沉积环境的控制作用显著,深湖—半深湖相形成的油页岩具有厚度大、分布范围广的特点,且盆地构造相对简单,开发条件优越。采用资源丰度类比法估算出长7页岩气资源量为(4.47～8.83)×1012m3。因此,鄂尔多斯盆地长7油页岩具有广阔的勘探开发前景。The Triassic Yanchang formation Chang 7 member oil shale is mainly distributed in the southern of Ordos ba- sin. The thickness of these layers from 10 to 30 meters （with the thickest exceeds 40 meters） , which is proved has gas gener- ating capacity by gas - testing. Yanchang formation depositiona] stage was at the height of power and splendour of the Ordos basin development, while at Chang 7 member, the lake basin ranged to the maximum. With the research on the relationship between the distribution of Chang 7 member oil shale and the distribution of sedimentary facies, it is concluded the distribution of oil shale in Ordos Basin？ is controlled by the depositional environments significantly. The oil shale formed from deep lake to half- deep lake depositiona] environment are higher thickness, widely spreading, and with simple basin structure, easily developed. In this paper, it is estimated that the magnitude of Chang 7 oil shale is about （4.47～8.83）×10^12m^3 by the method of resource abundance analogue. Therefore, Chang 7 oil shale in Ordos basin has a vast range of prospects for exploration and development.

关 键 词：鄂尔多斯盆地 长7油层组 油页岩 页岩气 资源丰度类比法 

分 类 号：TE122.2[石油与天然气工程—油气勘探]