| 准噶尔盆地南缘柴窝堡凹陷泥页岩地球化学和矿物学特征研究 |
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| 引用本文： | 熊金红,梁明亮,曹占元,王宗秀,郑建京,王作栋.准噶尔盆地南缘柴窝堡凹陷泥页岩地球化学和矿物学特征研究[J].地质力学学报,2017,23(4):585-593. |
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| 作者姓名： | 熊金红 梁明亮 曹占元 王宗秀 郑建京 王作栋 |
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| 作者单位： | 中国地质科学院地质力学研究所, 北京 100081;北京大学地球与空间科学学院, 北京 100871,中国地质科学院地质力学研究所, 北京 100081;中国科学院油气资源研究重点实验室/甘肃省油气资源研究重点实验室, 甘肃 兰州 730000,中国科学院油气资源研究重点实验室/甘肃省油气资源研究重点实验室, 甘肃 兰州 730000,中国地质科学院地质力学研究所, 北京 100081,中国科学院油气资源研究重点实验室/甘肃省油气资源研究重点实验室, 甘肃 兰州 730000,中国科学院油气资源研究重点实验室/甘肃省油气资源研究重点实验室, 甘肃 兰州 730000 |
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| 基金项目： | 国家自然科学基金项目（41072106）；中国科学院西部行动计划项目（KZCX2-XB3-12）。 |
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| 摘 要： | 利用XRD、Rock-eval和气相色谱—质谱仪对准格尔南缘柴窝堡凹陷上石炭统、上二叠统及下侏罗统的泥页岩进行了地球化学和矿物学特征分析。有机地球化学实验结果指示,柴窝堡凹陷石炭纪至二叠纪经历了较长时期的淡水—微咸水沉积环境,有机质来源具有相似的母源输入特征,干酪根类型具有II型混合母质特征;有机质热演化特征表明,下侏罗统泥页岩处于低熟阶段,上石炭统与上二叠统泥页岩具有机质丰度较高、有机质类型丰富、热演化处于成熟—高成熟阶段等特点;矿物学特征显示,上二叠统泥页岩长石、石英等脆性矿物含量为73%,粘土矿物次之,指示其脆性指数较高,具有较好的可压裂性和粘土表面吸附性。结合前人认识,预测该段泥页岩中可能蕴藏着一定规模的页岩气资源,具有较好的页岩气资源前景和勘探潜力。
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| 关 键 词： | 柴窝堡凹陷 泥页岩 生物标志物 矿物学 页岩气 |
| 收稿时间： | 2017/2/10 0:00:00 |
THE GEOCHEMICAL AND MINERALOGICAL CHARACTERISTICS OF SHALES IN CHAIWOBU DEPRESSION, SOUTHERN MARGIN OF JUNGGAR BASIN |
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| XIONG Jinhong,LIANG Mingliang,CAO Zhanyuan,WANG Zongxiu,ZHENG Jianjing and WANG Zuodong.THE GEOCHEMICAL AND MINERALOGICAL CHARACTERISTICS OF SHALES IN CHAIWOBU DEPRESSION, SOUTHERN MARGIN OF JUNGGAR BASIN[J].Journal of Geomechanics,2017,23(4):585-593. |
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| Authors: | XIONG Jinhong LIANG Mingliang CAO Zhanyuan WANG Zongxiu ZHENG Jianjing and WANG Zuodong |
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| Institution: | Institute of Geomechaniscs, Chinese Academy of Geological Sciences, Beijing 100081, China;School of Earth and Space Sciences, Peking University, Beijing 100871, China,Institute of Geomechaniscs, Chinese Academy of Geological Sciences, Beijing 100081, China;Key Laboratory of Petroleum Resources Research, Institute of Geology and Geophysics, Chinese Academy of Sciences/Key Laboratory of Petroleum Resources Research, Lanzhou 730000, Gansu, China,Key Laboratory of Petroleum Resources Research, Institute of Geology and Geophysics, Chinese Academy of Sciences/Key Laboratory of Petroleum Resources Research, Lanzhou 730000, Gansu, China,Institute of Geomechaniscs, Chinese Academy of Geological Sciences, Beijing 100081, China,Key Laboratory of Petroleum Resources Research, Institute of Geology and Geophysics, Chinese Academy of Sciences/Key Laboratory of Petroleum Resources Research, Lanzhou 730000, Gansu, China and Key Laboratory of Petroleum Resources Research, Institute of Geology and Geophysics, Chinese Academy of Sciences/Key Laboratory of Petroleum Resources Research, Lanzhou 730000, Gansu, China |
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| Abstract: | Using XRD, Rock-eval and GC-MS, kerogen type, organic geochemical characteristics and inorganic mineralogy features of shales in upper Carboniferous, upper Permian, and lower Jurassi from the Chaiwobu depression at southern margin of Junggar Basin were analyzed. The organic geochemical index shows that from Carboniferous to Permian, it has been a long period of fresh-brackish water sedimentary environment in Chaiwobu depression. The sources of organic matter shared the similar source input characteristics, and kerogen type were mainly featured by type II. The thermal evolution of organic matter indicates that shales in lower Jurassic were in low mature stage while shales in upper Carboniferous and upper Permian showed the features of high abundance, rich in types and mature-high mature stage in the thermal evolution. The mineralogical characteristics show that the content of brittle minerals feldspar and quartz in upper Permian shales is 73%, followed by clay mineral, indicating a high brittleness index and good property of fracturing and adsorption. Combined with the previous studies, it is predicted that a certain scale of shale gas resources may be contained in shales of this member with a good prospect and potential for exploration. |
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| Keywords: | Chaiwobu Depression shale biomarker mineralogy shale gas |
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