济阳陆相断陷盆地页岩油富集高产规律
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杨勇(1971—),男,河南遂平人,正高级工程师,博士,从事油气田开发研究及管理工作。E-mail:yangyong.slyt@sinopec.com。

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中国石化科研项目“东营凹陷页岩油有效开发技术”(P21060)


Enrichment and high production regularities of shale oil reservoirs in continental rift basin:A case study of Jiyang Depression,Bohai Bay Basin
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    摘要:

    济阳坳陷具有丰富的页岩油资源,2019年以来,陆续有YYP1,FYP1,BYP5等多口井获得峰值日产油量超100t/d的高产工业油流,展现了良好的勘探开发前景,总结济阳页岩油地质特征,分析其富集高产规律,对于实现页岩油经济有效开发具有重要指导意义。在对济阳页岩油勘探开发实践回顾的基础上,通过对页岩油岩相特征、储集空间、含油性、可压性的系统分析,明确了济阳页岩油富集高产的主控因素。研究表明,济阳页岩油资源丰富但是分布零散,油藏埋藏深,温度及压力系数高,具有构造复杂、岩相复杂、地应力复杂、流体性质复杂等“四复杂”的特点。烃源岩厚度大、有机质含量高、热演化程度适中、咸化湖盆富碳酸盐岩相发育是页岩油富集的主要因素,无机孔-缝网络发育、地层压力系数高、脆性矿物含量高、可压性好,CO2扩孔增能、多尺度缝网组合压裂是济阳页岩油高产的主要因素。济阳页岩油的突破,展现了陆相断陷盆地页岩油广阔的勘探开发前景,对中外同类型油藏具有较大的指导与借鉴意义。

    Abstract:

    There are abundant shale oil resources in Jiyang Depression,and high-production industrial oil flows have been successively obtained in several wells such as Wells YYP1,FYP1,and BYP5 with peak production exceeding 100 t/d since 2019,which shows good prospects for shale oil reservoir exploration and development. Summarizing the geological characteristics of shale oil reservoirs in Jiyang Depression and analyzing their enrichment and high production regularities are of important guiding significance for the economic and effective development of shale oil reservoirs. Based on the review of shale oil reservoir exploration and development practices in Jiyang Depression,the main control factors for the enrichment and high production of shale oil reservoirs were recognized in this paper through systematic research on the petrographic characteristics,reservoir space,oil-bearing properties,and compressibility of shale oil reservoirs in Jiyang Depression. Research shows that shale oil resources in Jiyang Depression are abundant but scattered,characterized by high depths,high temperatures and pressure coefficients,and complex tectonics,petrography,ground stress,and fluid properties. The large thickness of hydrocarbon source rocks,high organic matter content,moderate thermal evolution,and the development of a carbonate-rich phase in the saline lake basin are the main factors for shale oil enrichment. The development of an inorganic pore-fissure network,high formation pressure coefficient,high brittle mineral content,good compressibility,hole expansion and energy enhancement by CO2,and multi-scale fracture network fracturing are the main factors for the high production of shale oil reservoirs in Jiyang Depression. The breakthrough of shale oil reservoirs in Jiyang Depression shows the broad prospect of exploration and development of shale oil reservoirs in continental rift basins,which is of great guiding and reference significance for the same type of reservoirs in China and abroad.

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杨勇.济阳陆相断陷盆地页岩油富集高产规律[J].油气地质与采收率,2023,30(1):1~20

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  • 在线发布日期: 2023-02-13