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| 松辽盆地北部陆相泥页岩孔隙特征及其对页岩油赋存的影响 |
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李吉君1,2,史颖琳3,黄振凯4,王伟明1,曹群3,卢双舫1
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(1.中国石油大学非常规油气与新能源研究院,山东青岛 266580;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.东北石油大学地球科学学院,黑龙江大庆 163318;4.中国石化石油勘探开发研究院,北京 100083)
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| 摘要: |
| 综合应用气体吸附、高压压汞和扫描电镜方法对松辽盆地白垩系陆相泥页岩内部微观孔隙特征进行刻画,进而结合岩石热解、全岩矿物分析等实验手段对泥页岩孔隙发育的控制因素及其对含油性的影响进行分析。结果表明:研究区泥页岩孔隙类型以片状黏土矿物的层间微孔隙为主,裂缝发育程度不高,孔隙级别以微孔和介孔为主,泥页岩孔隙发育总体受控于埋深和次生孔隙发育情况,有机孔隙对页岩油储层不具有重要意义;油源充足的情况下,泥页岩含油性明显受控于孔隙度,其中直径大于20 nm孔隙是页岩油的主要赋存空间,在进行页岩油勘探开发时应着力寻找较大孔隙发育的甜点区;龙虎泡阶地南部与齐家-古龙凹陷交界处青山口组含砂岩或砂质薄夹层的泥页岩层系中泥岩次生孔隙发育,含油性高,易于压裂,是松辽盆地北部页岩油勘探开发的首选区域。 |
| 关键词: 松辽盆地 页岩油 孔隙 比表面积 含油性 |
| DOI：10.3969/j.issn.1673-5005.2015.04.004 |
| 分类号::TE 122.3 |
| 基金项目:国家自然基金项目(41472105,2, 41330313,4);油气资源与探测国家重点实验室开放课题(PRP/open-1209);中国石油科技创新基金项目(2014D-5006-0107);中央高校基本科研业务费专项(14CX02117A, 14CX02224A, 13CX05013A) |
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| Pore characteristics of continental shale and its impact on storage of shale oil in northern Songliao Basin |
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LI Jijun1,2, SHI Yinglin3, HUANG Zhenkai4, WANG Weiming1, CAO Qun3, LU Shuangfang1
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(1.Research Institute of Unconventional Oil ＆ Gas and Renewable Energy in China University of Petroleum, Qingdao 266580, China;2.State Key Laboratory of Petroleum Resources and Prospecting in China University of Petroleum, Beijing 102249, China;3.College of Earth Sciences, Northeast Petroleum University, Daqing 163318, China;4.Institute of Petroleum Exploration and Development, SINOPEC, Beijing 100083, China)
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| Abstract: |
| Gas adsorption, high-pressure mercury injection and scanning electron microscopy were performed to study microscopic pore characteristics of the Cretaceous continental shale in the northern Songliao Basin.Rock pyrolysis, mineral composition analysis were combined to determine the control factors and impact on oil-bearing property of pore development. The results show that pores between flaky clay minerals predominate shale pores. The development extent of fracture is not high, and shale pores consist mainly of micropores and mesopores. Development extent of shale pore is controlled by buring depth and secondary pore development, and the organic pore is not of great importance to shale oil reservoir. If oil source is abundant, oil-bearing property of shale is mainly controlled by porosity, and pores with diameters larger than 20 nm are the main storage space. As a result, the "sweet spots" with large pores should be paid more attention to in the exploration and exploitation. At the junction of the southern Longhupao terrace and Qijia-Gulong sag, thin sandy mudstone and siltstone inter beds are well developed in Qingshankou Formation, which is favorable to be artificially fractured. In addition, shale in the formation has high secondary porosity and excellent oil-bearing property. Considering above factors, this area is the preferable target for exploration and exploitation of shale oil in the northern Songliao Basin. |
| Key words: Songliao Basin shale oil pore specific surface area oil-bearing property |
