济阳坳陷古近系沙四段—沙三段页岩油立体评价探索与实践

doi:10.3969/j.issn.1672-7703.2024.03.004

摘要/Abstract

摘要： 济阳坳陷为中国东部典型的陆相断陷盆地，古近系沙河街组沙四段—沙三段沉积一套巨厚的中低成熟度页岩油储层，资源量超100×10⁸t，目前处于评价试验阶段，勘探开发前景广阔。针对陆相页岩油岩相复杂、储集空间多样、非均质性强、烃源岩厚度大的特点，以地震、测井、录井、取心及实验分析等资料为基础，开展烃源岩有利岩相、储集性、含油性、可动性、可压裂性“四性”评价，通过评价井部署和井组先导试验实施，形成以甜点立体评价、井网立体优化、水平井立体压裂为核心的评价技术，落实资源潜力及技术适应性，为优选建产区带、实现规模化开发产能建设提供重要支撑。通过博兴、牛庄和民丰等地区立体评价试验，落实甜点评价标准可靠性、井距层距合理性和压裂工艺适应性，建成中国石化首个10万吨级页岩油先导试验井组，有力支撑了济阳陆相断陷湖盆页岩油国家级示范区的高效建设。

关键词: 济阳坳陷, 页岩油, 立体评价, 开发技术政策, 开发实践

Abstract: Jiyang Depression is a typical continental fault basin in eastern China. A set of thick medium-low maturity shale oil has been identified in the fourth-third member of the Paleogene Shahejie Formation, with resources of more than 100×10⁸ t, which is being evaluated and tested at present, showing broad exploration and development prospects. Based on the characteristics of complex lithofacies, diverse reservoir spaces, high heterogeneity, and large source rock thickness of continental shale oil, seismic data, mud logging, wireline logging, coring, and laboratory test data are combined to conduct “four-property” evaluation of source rock, including favorable lithofacies, reservoir physical properties, oil-bearing property, movability, and fracability. The deployment of appraisal wells and pilot tests of well group enable to develop an evaluation technology with the core of stereoscopic sweet spot evaluation, stereoscopic well network optimization, and stereoscopic horizontal well fracturing, and resource potential and technological adaptability have been determined, which provide important support for optimally selecting production zone and achieving large-scale development and production capacity construction. The stereoscopic evaluation tests have been conducted in Boxing, Niuzhuang, and Minfeng areas, confirming the reliability of sweet spot evaluation standards, rationality of well spacing and layer spacing, and adaptability of fracturing technology, and helping to build the first shale oil pilot test well group of Sinopec with a level of 10×10⁴ t, which effectively support the high-efficiency construction of national shale oil demonstration zone in Jiyang continental fault lake basin.

中图分类号:

TE319

杨勇, 张世明, 吕琦, 李伟忠, 蒋龙, 刘祖鹏, 吕晶, 任敏华, 路广. 济阳坳陷古近系沙四段—沙三段页岩油立体评价探索与实践[J]. 中国石油勘探, 2024, 29(3): 31-44.

Yang Yong, Zhang Shiming, Lv Qi, Li Weizhong, Jiang Long, Liu Zupeng, Lv Jing, Ren Minhua, Lu Guang. Research and practice of stereoscopic evaluation of shale oil in the fourth-third member of the Paleogene Shahejie Formation in Jiyang Depression[J]. China Petroleum Exploration, 2024, 29(3): 31-44.

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