济阳坳陷页岩油储层物质组分对含油性的控制规律
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滕建彬(1980—),男,山东青州人,高级工程师,在读博士研究生,从事油气储层综合评价研究。联系电话:15965292798,E-mail: tengjianbin.slyt@sinopec.com。

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国家“973”计划“中国东部古近系陆相页岩油富集机理与分布规律”下属02 课题“陆相页岩油储集空间与发育模式”(2014CB239102),国家科技重大专项“济阳坳陷页岩油勘探开发目标评价”任务二“济阳坳陷泥页岩储集特征与发育规律研究”(2017ZX05049-004-002),中国石化科技重大专项“济阳坳陷油气聚集规律及精细评价关键技术”(ZDP17008)


Control law of material components of shale oil reservoir on oil-bearing characteristics in Jiyang Depression
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    摘要:

    借助岩石学和地球化学分析手段,对济阳坳陷沙四段上亚段和沙三段下亚段页岩油储层进行原油赋存状态和物质组分分析。荧光特征分析结果表明:束缚型和游离型沥青分别选择性赋存于泥质纹层、碳酸盐纹层和裂缝内,泥质纹层作为生油的母质仓储,易于富集炭质沥青和沥青质沥青;碳酸盐纹层相对于泥质纹层具有更优越的储集空间,易于富集胶质沥青和油质沥青,更易流动的油质沥青则汇集到裂缝内。研究发现,方解石脉本质上是一种接近于完全充填的裂缝表现形式,总结出4个亮晶方解石脉体的识别标志,其中轴愈合线附近的方解石晶间孔和未愈合缝可以作为油质沥青的运移通道。页岩油储集空间的发育主要受控于岩石结构与构造及物质组分,矿物组分差异和有机质热演化是页岩油储集空间和含油性的2个主要影响因素。受此影响,泥页岩储集性表现为:①纹层状泥页岩储层具有高孔隙度;②碳酸盐含量高的泥页岩储层具有高孔隙度;③高有机质热演化程度的泥页岩储层具有高孔隙度。

    Abstract:

    By means of petrology and geochemical analysis,the oil-bearing properties and material components of shale oil reservoirs in Upper Es4 and Lower Es3 Members in Jiyang Depression were analyzed. Fluorescence characteristics analysis results show that the resident and free asphaltene selectively occur in argillaceous laminates,gray carbonate laminates and fractures. Argillaceous lamina,as the parent material storage for oil-generated,is easy to enrich carbon asphaltene and bituminiferous asphaltene. Carbonate laminates have superior storage space compared with argillaceous laminates,which are suitable to accumulate gum asphaltene and crude oil asphaltene,and crude oil asphaltene can easily flow into microcracks.It is found that the calcite vein is essentially a kind of fully filled fracture. Four identification marks of recognition calcite vein are summarized,among which the calcite intercrystalline pore and the non healing crack near the shaft healing line can be regarded as the percolation path for the oil asphaltene. The spatial development and oil content of shale oil reservoir are mainly controlled by the rock texture,structure types and material components. Mineral composition differences and thermal evolution of organic matter are two main factors that influence shale oil storage space and oil content. As a result,the storage of shale oil has following characteristics:shale with argillaceous laminates and gray carbonate laminates has high porosity,shale with high carbonate content has high porosity,and the higher thermal evolution degree of organic matter corresponds to the higher porosity.

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滕建彬,刘惠民,邱隆伟,张守鹏,郝运轻,田方,朱丽鹏,方正伟.济阳坳陷页岩油储层物质组分对含油性的控制规律[J].油气地质与采收率,2019,26(1):80~87

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  • 在线发布日期: 2019-04-02