| 文剑航,张号,王亿,段轲,张焱林,许露露,谢通,石先滨.鄂西地区富有机质页岩储层特征对比及差异性分析[J].矿产勘查,2026,17(1):58-68 |
| 鄂西地区富有机质页岩储层特征对比及差异性分析 |
| Comparative analysis of characteristics and differences of organic-rich shale reservoirs in western Hubei Province |
| 投稿时间：2025-03-23 |
| DOI：10.20008/j.kckc.202601005 |
| 中文关键词: 鄂西地区 页岩储层 矿物组成 岩相类型 主控因素 |
| 英文关键词: western Hubei Province shale reservoirs mineral composition lithofacies types main controlling factors |
| 基金项目:本文受湖北省地质局“湖北长阳渔峡口—都镇湾二叠系页岩气远景区调查”项目(KCDZ2025-24)资助。 |
| 作者 | 单位 | | 文剑航 | 湖北省地质调查院,湖北武汉 430000
资源与生态环境地质湖北省重点实验室,湖北武汉 430000 | | 张号 | 湖北煤炭地质勘查院,湖北武汉 430000 | | 王亿 | 湖北省地质调查院,湖北武汉 430000
资源与生态环境地质湖北省重点实验室,湖北武汉 430000 | | 段轲 | 湖北省地质调查院,湖北武汉 430000
资源与生态环境地质湖北省重点实验室,湖北武汉 430000 | | 张焱林 | 湖北省地质调查院,湖北武汉 430000
资源与生态环境地质湖北省重点实验室,湖北武汉 430000 | | 许露露 | 湖北省地质调查院,湖北武汉 430000
资源与生态环境地质湖北省重点实验室,湖北武汉 430000 | | 谢通 | 湖北省地质调查院,湖北武汉 430000
资源与生态环境地质湖北省重点实验室,湖北武汉 430000 | | 石先滨 | 湖北省地质调查院,湖北武汉 430000
资源与生态环境地质湖北省重点实验室,湖北武汉 430000 |
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| 中文摘要: |
| 为进一步研究鄂西地区有机质页岩储层差异成因以及对页岩气聚集成藏的影响，为该地区页岩气勘探开发提供地质依据，本文利用典型钻井的岩心及分析测试资料，结合沉积环境和含气性特征，对该地区 3套主力含气页岩储层的岩性组合、矿物组成和岩相类型等特征进行对比分析。研究表明:牛蹄塘组富有机质页岩储层以成熟度＞2%的黑色炭质页岩为主，表现为相对低有机质含量，低石英、高黏土、高碳酸盐含量，干酪根类型以 II1型为主，岩相整体属于富硅/泥混合质页岩(M-2)；五峰组—龙马溪组富有机质页岩储层以成熟度＞3%的黑色炭/硅质页岩和含炭硅质岩为主，表现为相对低有机质含量，高石英、低黏土、低碳酸岩含量，干酪根类型以 I型为主，岩相整体属于硅质页岩(S-2)；大隆组富有机质页岩储层以成熟度＞ 2%的灰黑色含炭硅质岩、硅质泥岩为主，表现为相对高有机质含量，高石英、低黏土和高碳酸盐含量，干酪根类型以 I型为主，岩相整体属于硅质页岩(S-2)。研究区富有机质页岩储层特征及矿物成分的差异性主要受海平面升降持续时间、含氧量以及物源输入等沉积环境的影响，有机质含量是该区富有机质页岩储层页岩气富集的主控因素。 |
| 英文摘要: |
| In order to further study the causes of the differences in organic-rich shale reservoirs in western Hu-bei region and their impacts on the accumulation and reservoir formation of shale gas, and to provide a geological ba-sis for the exploration and development of shale gas in this region, this paper uses the core data and analysis andtesting data of typical wells, and combines the sedimentary environment and gas-bearing characteristics to conducta comparative analysis of the lithology combination, mineral composition, and lithofacies types of the three maingas-bearing shale reservoirs in western Hubei region. The research shows that: The organic-rich shale reservoirs ofthe Niutitang Formation are mainly composed of black carbonaceous shales with a maturity greater than 2%. Theyare characterized by relatively low organic matter content, low quartz content, high clay content, and high carbonatecontent. The kerogen type is mainly Type II1, and the lithofacies as a whole belongs to the silicon/mud-rich mixedshale (M-2). The organic-rich shale reservoirs of the Wufeng-Longmaxi Formation are mainly composed of blackcarbon/siliceous shales and carbonaceous siliceous rocks with a maturity greater than 3%. They show relatively loworganic matter content, high quartz content, low clay content, and low carbonate content. The kerogen type is mainlyType I, and the lithofacies as a whole belongs to siliceous shale (S-2). The organic-rich shale reservoirs of theDalong Formation are mainly composed of grayish-black carbonaceous siliceous rocks and siliceous mudstones witha maturity greater than 2%. They exhibit relatively high organic matter content, high quartz content, low clay con-tent, and high carbonate content. The kerogen type is mainly Type I, and the lithofacies as a whole belongs to sili-ceous shale (S-2). The differences in the characteristics of organic-rich shale reservoirs and mineral compositionsin the study area are mainly affected by sedimentary environments such as the duration of sea-level rise and fall,oxygen content, and provenance input. The organic matter content is the main controlling factor for the enrichmentof shale gas in the organic-rich shale reservoirs in this area. |
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