断陷湖盆页岩油形成的地质要素匹配:以辽河西部凹陷沙三段为例  

Geological Factors Matching of Shale Oil Accumulation in Rifted Lacustrine Basins:A Case Study from 3rd Member of Shahejie Formation in Liaohe Western Depression

作　　者：荆铁亚[1] 王金意[1] 毛俊莉[2] 钟学彬 张健[1] Jing Tieya Wang Jinyi Mao Junli Zhong Xuebin Zhang Jian(Huaneng Clean Energy Research Institute,Beijing 102209, China Strategic Research Center of Oil and Gas Resources of MLR, Beijing 100034, China Chongqing Mineral Resources Development Company Limited, Chongqing 401123, China)

机构地区：[1]中国华能集团清洁能源技术研究院有限公司,北京102209 [2]国土资源部油气资源战略中心,北京100034 [3]重庆矿产资源开发有限公司,重庆401123

出　　处：《地质科技情报》2016年第5期148-153,共6页Geological Science and Technology Information

基　　金：中国华能集团清洁能源技术研究院院控课题(TY-15-CER102);国家自然科学基金项目(41272167)

摘　　要：为了研究我国断陷湖盆陆相页岩油发育的地质条件和富集机理,以辽河西部凹陷沙三段为例,归纳总结了断陷湖盆页岩油聚集的有效性。通过沉积构造分析,岩心观察,岩矿、地球化学、含油量、生烃模拟等实验测试方法研究了泥页岩的生烃潜力、赋存空间和富集条件。结果表明沙三段页岩有机质丰度较高,w（TOC）平均在2%左右;有机质类型以Ⅰ和Ⅱ1等偏腐泥型干酪根为主;有机质热演化程度偏低,Ro介于0.4%～0.9%之间,干酪根以生油为主;岩心和薄片扫描电镜均观察到各类孔隙和微裂缝的大量存在,反映断陷湖盆背景下发育的厚层泥页岩具有较好的页岩油聚集条件匹配关系,页岩油资源前景较好。脆性矿物含量较低的特征也为陆相页岩油的开采技术提出了挑战。To study geological characteristics and accumulation mechanism of the shale oil development in rifted basins in China,this paper focuses on the geological condition and its matching relationship of shale oil accumulation for 3rd Member of Shahejie Formation in Liaohe Western Depression.The study has conducted sedimentary analysis and core observations as well as the experiments on mineralogy,geochemistry,oil content and hydrocarbon generation.The results show that the shales developed are characterized by high organic matter with an average TOC over 2.0%,main types ofⅠ-Ⅱ1kerogen and relatively low thermal maturity（Ro）ranging from 0.4%-0.9%,leading to the oil generation mainly in the formations.Various pores and micro-fractures are found to have developed for shale oil-gas storage.Therefore,the geological conditions for massive shales development in the rifted basin are in good match with the accumulation of shale oil.Fragile mineral content is low in the shale,which offers a challenge for hydraulic stimulation.

关 键 词：断陷湖盆 辽河西部凹陷 沙河街组三段 页岩油 聚集机理 

分 类 号：TE122.221[石油与天然气工程—油气勘探]