页岩气富集高产主控因素分析——以四川盆地涪陵地区五峰组-龙马溪组一段页岩为例

方栋梁; 孟志勇

doi:10.11781/sysydz202001037

页岩气富集高产主控因素分析——以四川盆地涪陵地区五峰组-龙马溪组一段页岩为例

doi: 10.11781/sysydz202001037

中国石化江汉油田分公司勘探开发研究院, 武汉 433124

基金项目:

国家科技重大专项 2016ZX05060

国家自然科学青年基金项目 41702149

详细信息

作者简介:
方栋梁(1982-), 男, 工程师, 从事非常规油气勘探开发研究工作。E-mail: 739981781@qq.com

中图分类号: TE122.3
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- 被引次数: 0
出版历程
- 收稿日期: 2019-04-30
- 修回日期: 2019-12-13
- 刊出日期: 2020-01-28

Main controlling factors of shale gas enrichment and high yield: a case study of Wufeng-Longmaxi formations in Fuling area, Sichuan Basin

Exploration and Development Research Institute, SINOPEC Jianghan Oilfield, Wuhan, Hubei 433124, China

摘要

摘要: 以四川盆地涪陵地区五峰组-龙马溪组海相页岩为研究对象，综合岩心观察、地化分析、测井和地震资料，分别从页岩气富集和高产两方面开展主控因素系统分析，明确有机碳含量、微-纳米尺度孔隙和保存条件是页岩气富集主控因素。其中有机碳含量不仅是评价页岩原生品质的重要参数，同时影响微-纳米尺度孔隙发育特征，而保存条件是页岩气富集的重要基础保障。页岩气高产受脆性矿物含量、埋深、构造形态和裂缝因素影响，其中脆性矿物含量越高，页岩可压性越好；页岩埋深及构造形态对于地应力影响较大，从而影响页岩储层的压裂改造效果；裂缝的发育导致压裂过程中压力的定向性泄压，无法形成有效复杂缝网。
- 页岩气 /
- 富集高产 /
- 主控因素 /
- 五峰组-龙马溪组 /
- 涪陵地区 /
- 四川盆地
Abstract: The controlling factors of shale gas enrichment and yield were discussed based on core observation, geochemical analysis, logging and seismic data of marine shale collected from the Wufeng-Longmaxi formations in the Fuling area of Sichuan Basin. Total organic carbon content, micro-to nano-scale pores and preservation conditions are the main controlling factors for shale gas enrichment. The total organic carbon content is not only an important parameter for evaluating original shale quality, but also affects micro-to nano-scale pore development. The preservation condition is important for shale gas enrichment. The high yield of shale gas is affected by brittle mineral content, burial depth, structural morphology and fractures. The higher the brittle mineral content, the better the compressibility of shale and the better the effect of fracturing. In addition, burial depth and structure features have great effect on crustal stress, and thus have significant influence on fracturing. Natural fracture development leads to directional pressure relief during fracturing, and it is difficult to form an effective and complex permeability mesh.
- shale gas /
- enrichment and high yield /
- main controlling factor /
- Wufeng-Longmaxi formations /
- Fuling area /
- Sichuan Basin

HTML全文

图 1 四川盆地涪陵地区志留系底反射层构造及JY1井五峰组—龙马溪组岩性特征

Figure 1. Structure of basal Silurian and lithological characteristics of Wufeng-Longmaxi formations in well JY1, Fuling area, Sichuan Basin

下载: 全尺寸图片幻灯片

图 2 四川盆地焦石坝地区五峰组—龙马溪组一段含气页岩有机碳含量与总含气量和比表面积关系

Figure 2. Correlation diagram of organic carbon content, total gas content and specific surface area of gas-bearing shale in Wufeng Formation-first member of Longmaxi Formation, Jiaoshiba area, Sichuan Basin

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图 3 四川盆地焦石坝地区五峰组—龙马溪组一段含气页岩比表面积主控因素相关性分析

Figure 3. Correlation of main controlling factors of specific surface area of gas-bearing shale in Wufeng Formation-first member of Longmaxi Formation, Jiaoshiba area, Sichuan Basin

下载: 全尺寸图片幻灯片

图 4 四川盆地焦石坝地区五峰组—龙马溪组一段含气页岩微—纳米孔隙镜下观察

Figure 4. Observation of micro- to nano-porosity in gas-bearing shale in Wufeng Formation-first member of Longmaxi Formation, Jiaoshiba area, Sichuan Basin

下载: 全尺寸图片幻灯片

图 5 四川盆地焦页B井五峰组—龙马溪组一段含气页岩上下邻层裂缝及流体包裹体照片

Figure 5. Photographs of cracks and fluid inclusions in upper and lower adjacent layers of gas-bearing shale in Wufeng Formation-first member of Longmaxi Formation, well Jiaoye B, Sichuan Basin

下载: 全尺寸图片幻灯片

图 6 四川盆地焦石坝区块1 500 m水平段无阻流量与测井解释脆性指数拟合

Figure 6. Correlation of unobstructed flow in 1 500 m horizontal section and brittleness index fitting of logging interpretation, Jiaoshiba area Sichuan Basin

下载: 全尺寸图片幻灯片

图 7 四川盆地焦石坝地区下部气层已测试井归一化试气产量与埋深关系

Figure 7. Normalized test gas yield and burial depth of test wells in gas reservoir in lower part of Jiaoshiba area, Sichuan Basin

下载: 全尺寸图片幻灯片

图 8 四川盆地焦石坝地区焦页F井水平段曲率预测及微地震检测结果

Figure 8. Curvature prediction and microseismic test results of horizontal section of well JY F in Jiaoshiba area, Sichuan Basin

下载: 全尺寸图片幻灯片

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