| 鄂尔多斯盆地油页岩的主要地质特征及资源潜力 |
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| 引用本文： | 白云来 马,龙 吴武军 马玉虎.鄂尔多斯盆地油页岩的主要地质特征及资源潜力[J].中国地质,2009,36(5):1123-1137. |
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| 作者姓名： | 白云来 马 龙 吴武军 马玉虎 |
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| 作者单位： | 中国石油勘探开发研究院西北分院,甘肃,兰州,730020 |
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| 摘 要： | 前人及笔者最近研究结果表明:鄂尔多斯盆地除赋存有大量的石油、天然气、煤、煤层气、地下水及铀矿而外,还赋存着巨量的油页岩资源.油页岩分别赋存于早二叠世山西组、中-晚三叠世延长组、晚三叠世瓦窑堡组及中侏罗世早期延安组、中侏罗世晚期安定组地层中;在空间上,油页岩多呈层状展布于盆地内部而隐伏于地下.中、晚三叠世延长组和中侏罗世早期延安组是主要含油页岩层位.早二叠世油页岩形成于海陆交互的滨海环境,中-晚三叠世延长组中的油页岩形成于陆相深湖或半深湖环境,晚三叠世瓦窑堡组油页岩、中侏罗世早期延安组油页岩形成于陆相湖泊三角洲湖沼环境,与煤层共生,而中侏罗世晚期安定组油页岩仅局限于陆相半深湖环境.通过对陕西铜川北部和宁夏固原炭山典型油页岩矿的剖析,查明鄂尔多斯油页岩矿层厚度一般为4～36 m,含油率一般为1.5%～13.7%(下限略低于3.5%这一油页岩矿的最低工业品位,本次低于部分暂不参加资源量的计算);发热量一般为1.66～20.98 MJ/kg,视比重1.55～2.46.埋藏2000 m以上的页岩油资源量(334)达2000×108 t以上,其中探明储量(121)1×108t,显示了巨大的资源前景.盆地东南部及西部的油页岩埋藏浅,部分地段探明程度高,交通条件好,如果及时开发利用,不仅可以获得初步经济效益,同时也可为鄂尔多斯油页岩的开发利用获取开拓性的宝贵经验.
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| 关 键 词： | 油页岩 地质特征 资源 鄂尔多斯盆地 |
Geological characteristics and resource potential of oil shale in Ordos basin |
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| BAI Yun-lai,MA Long,WU Wu-jun,MA Yu-hu.Geological characteristics and resource potential of oil shale in Ordos basin[J].Chinese Geology,2009,36(5):1123-1137. |
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| Authors: | BAI Yun-lai MA Long WU Wu-jun MA Yu-hu |
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| Institution: | Northwest Branch Institute of Research Institute of Petroleum Exploration and Development, PetroChina, Lanzhou 730020, Gansu, China |
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| Abstract: | Researches have shown that there exist not only large quantities of oil and gas, coal, coal-bed gas, groundwater and uranium deposits but also abundant oil shale resources in Ordos basins. Oil shale mainly occurs in Early Permian Shanxi Formation, Middle -Late Triassic Yanchang Formation, Late Triassic Wayaobao Formation, early Middle Jurassic Yan'an Formation and late Middle Jurassic Anding Formation. Oil shale usually assumes the layered form and lies at the depth of the basin. The major oil shale beds lie in both Yanchang Formation and Yan'an Formation. Oil shale was formed in paralic offshore in Early Permian, in terrestrial fades (deep or semi-deep lake) in Middle-Late Triassic, and in terrestrial fades lacustrine delta and lacustrine bog (associated with coal bed) in Late Triassic and early Middle Jurassic, and confined to terrestrial fades (semi-deep lake) in late Middle Jurassic. Oil shale is usually 4-36m in thickness, its oil-bearing rate is 1.5%-13.7%, and its apparent gravity is 1.55 -2.46, as revealed by an analysis of the oil shale in northern Tongchuan of Shaanxi Province and Tanshan of Guyuan in Ningxia. The shale oil resource amount (334) is over 2000 ×10~8 t, the burial depth is above 2000 m, and the proved reserves (121)have reached 1×10~8t, suggesting a great resource potential. The buried depth of the oil shale is shallow, the verified extent is high in some areas, and the traffic conditions are good. If the oil shale can be developed in time, not only the preliminary economic benefit will be acquired but also the valuable experience in exploiting oil shale will be gained in Ordos basin. |
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| Keywords: | oil shale geological characteristics resources Ordos basin |
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