石油与天然气地质 ›› 2013, Vol. 34 ›› Issue (6): 725-730.doi: 10.11743/ogg20130602

• 非常规油气 • 上一篇    下一篇

三塘湖盆地马朗凹陷二叠系油气运移机制与页岩油富集规律

柳波1,2, 迟亚奥1, 黄志龙2, 罗权生3, 吴红烛2, 陈旋3, 申英3   

  1. 1. 东北石油大学 非常规油气成藏与开发省部共建国家重点实验室培育基地, 黑龙江 大庆 163318;
    2. 中国石油大学 油气资源与探测国家重点实验室, 北京 102249;
    3. 中国石油 吐哈油田分公司, 新疆 哈密 839009
  • 收稿日期:2012-10-30 修回日期:2013-09-20 出版日期:2013-12-08 发布日期:2014-01-04
  • 第一作者简介:柳波（1983- ），男，博士、副教授，油气成藏地质学、非常规油气地质与勘探。E-mail：Liubo6869@163.com。
  • 基金项目:
    国家青年自然科学基金项目（41202101）；国土资源部全国油气资源战略选区调查与评价专项（2009GYXQ15）；中国博士后科学基金面上资助项目（2013M541338）。

Migration mechanism of the Permian hydrocarbon and shale oil accumulation in Malang Sag, the Santanghu Basin

Liu Bo1,2, Chi Yaao1, Huang Zhilong2, Luo Quansheng3, Wu Hongzhu2, Chen Xuan3, Shen Ying3   

  1. 1. Accumulation and Development of Unconventional Oil and Gas, State Key Laboratory Cultivation Base Jointly-constructed by Heilongjiang Province and the Ministry of Science and Technology, Northeast Petroleum University, Daqing, Heilongjiang 163318, China;
    2. State Key Laboratory of Petroleum Resource and Prospecting, China University of Petroleum, Beijing 102249, China;
    3. PetroChina Turpan-Hami Oilfield Company, China National Petroleum Cororation, Hami, Xinjiang 839009, China
  • Received:2012-10-30 Revised:2013-09-20 Online:2013-12-08 Published:2014-01-04

PDF (PC)

10581

被引次数

12

摘要： 三塘湖盆地马朗凹陷发现的二叠系芦草沟组页岩油，具有较好的油气资源潜力，其形成与富集机理与常规油气藏有很大差异。页岩油运移机制是页岩油形成机理的重要部分，在岩心观察、薄片鉴定结合地球化学分析化验及地质条件综合分析的基础之上，重点研究了页岩油运移的动力、通道、方向、距离和效率等方面。结果表明，页岩油在源内的运移效应不明显，油气的富集非源内规模性运移聚集结果；油气垂向向源外的运移效应较为显著，活动的大规模断裂会降低源内页岩油丰度。页岩油的初次运移以生烃造成的地层超压为动力，通过干酪根网络、纹层间及微裂缝发生了小尺度的运移，油气大部分滞留原地，运移效率极低。在输导断裂发育的地区，泥页岩生成的油气发生了垂向向上的二次运移，在芦草沟组上覆地层聚集成藏。页岩油的这种运移机制决定了页岩油连续分布、油水分异差、油气聚集不受构造控制及断裂活动区油气丰度较低的特点。

关键词: 运移效应, 运移通道, 页岩油, 二叠系, 马朗凹陷, 三塘湖盆地

Abstract: The shale oil potential is high in the Permian Lucaogou Formation in Malang Sag,Santanghu Basin.Its genetic mechanism and accumulation patterns are greatly different from those of conventional reservoirs.Migration is a major component of genetic mechanism of shale oil.Based on core and thin section observation,and in combination with geochemical data and geological condition analysis,this paper studied the migration mechanism of shale oil,including dynamic force,pathway,direction,distance,efficiency and so on.Migration effect of shale oil within source rocks is insignificant,thus shale oil reservoirs are not the result of oil migration and accumulation within source rocks.In contrast,vertical migration effect of shale oil out of source rocks is significant.The existence of large active faults may lower the abundance of shale oil in source rock.High formation pressure caused by hydrocarbon generation is the main dynamic force of primary migration.After small scale migration through kerogen network,interlamination and microfractures,most of the oil generated retain in place,and the migration efficiency is very low.On the contrary,in areas where carrier faults are well developed,the oil can migrate vertically along the faults and accumulate in the overlying reservoirs of the Lucaogou Formation.This migration mechanism of shale oil determines the characteristics of shale oil play such as continuous distribution,no obvious oil-water contact,no influence of structure on oil accumulation,and low abundance of oil in areas with active faults.

Key words: migration effect, migration pathway, shale oil, Permian, Malang Sag, Santanghu Basin

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