| 基于热模拟实验的富有机质泥页岩成岩作用及演化特征 |
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| 引用本文： | 栾国强,董春梅,马存飞,林承焰,张津营,吕夏霏,Muhammad Aleem Zahid.基于热模拟实验的富有机质泥页岩成岩作用及演化特征[J].沉积学报,2016,34(6):1208-1216. |
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| 作者姓名： | 栾国强 董春梅 马存飞 林承焰 张津营 吕夏霏 Muhammad Aleem Zahid |
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| 作者单位： | 1.中国石油大学(华东)地球科学与技术学院 山东青岛 266580; |
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| 基金项目： | 国家科技重大专项(2011ZX05009-003)，中国石油大学2015年度研究生创新工程(YCX2015005)[Major National Science and Technology Project |
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| 摘 要： | 富有机质泥页岩蕴含丰富的油气资源，但成岩研究基础薄弱，已成为制约页岩油气勘探开发进程的重要因素。通过开展成岩热模拟实验，结合扫描电镜观察、流体成分测试及有机酸测试等实验测试手段，全面描述实验过程中所发生的水-岩化学反应，试图揭示泥页岩成岩过程及成岩演化规律。研究结果显示，有机质热演化过程中存在一个较宽的有机酸生成窗口，对孔隙流体性质具有重要影响；长石和方解石存在接力溶蚀现象，长石溶蚀高峰过后紧接着出现方解石溶蚀高峰，但方解石溶蚀窗较窄，此后出现方解石重新沉淀结晶；黏土矿物转化及长石的溶蚀过程中会产生大量自生微晶石英，成链状或簇状胶结泥页岩骨架。泥页岩地层作为一个相对封闭体系，各类成岩作用之间相互关联，相互影响，构成错综复杂的成岩体系，进一步增加其成岩作用研究难度。
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| 关 键 词： | 泥页岩 成岩作用 模拟实验 |
| 收稿时间： | 2015-12-31 |
Pyrolysis Simulation Experiment Study on Diagenesis and Evolution of Organic-rich Shale |
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| LUAN GuoQiang,DONG ChunMei,MA CunFei,LIN ChengYan,ZHANG JinYing,L XiaFei,Muhammad Aleem Zahid.Pyrolysis Simulation Experiment Study on Diagenesis and Evolution of Organic-rich Shale[J].Acta Sedimentologica Sinica,2016,34(6):1208-1216. |
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| Authors: | LUAN GuoQiang DONG ChunMei MA CunFei LIN ChengYan ZHANG JinYing L XiaFei Muhammad Aleem Zahid |
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| Institution: | LUAN GuoQiang,DONG ChunMei,MA CunFei,LIN ChengYan,ZHANG JinYing,L(U) XiaFei,Muhammad Aleem Zahid |
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| Abstract: | It is well known that shale possess abundant hydrocarbon resources and therefore attracted more and more in the recent years. It is the fact that there are only a few researches have been conducted as reservoir instead of source rocks blocks the exploration as well as development of the shale oil and gas. In this study, we look into the diagenetic processes of shale and evolution by heat simulation experiment conduction. The shale sample of which the Ro is 0.7%, from lower section of Es3 in Jiyang depression and composed of calcite, quartz, clay, organic matters and other minerals, was divided into four pieces. Different temperatures(150℃, 200℃, 250℃, 300℃) was set to modify a series of stage of the diagenetic evolution process. The solution from the experiments was detected for ions and organic acids. And the rock samples were observed under the SEM. The study shows that:①The content of organic acids increased with the rising temperature and it suggests that a relatively wide organic acid generated window which affects pore fluid features, exists in the period of organic matter thermal evolution. ②Even though feldspar and calcite are main soluble minerals in the sample, different dissolution process was observed both by the ion detection and by the SEM-observation. Feldspar is easier to be dissolved while the dissolution of calcite always goes after. The study also shows a narrow calcite dissolution window followed by its re-deposition happened during 200℃~250℃. ③The fine-grained quartz released from the clay mineral reaction smectite-illite transformation within the micropores of the shale precipitated as 1~3 μm sub-spherical discrete grains, short chains, and small clusters interpreted to be parts of larger interconnected microquartz networks and interlocking aggregates of several microquartz and authigenic clay (illite-smectite and illite)crystals. Shale formation can be seen as a closed system where various diagenesis are influencing each other to form a complex diagenesis system and result in more difficulties on diagenesis research. |
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| Keywords: | shale diagenesis process simulation experiment |
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