| 鄂尔多斯盆地富县—黄陵县地区上三叠统
延长组长6、长7浊积岩成岩作用 |
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| 引用本文： | 冯娟萍,王若谷,尚 婷.鄂尔多斯盆地富县—黄陵县地区上三叠统
延长组长6、长7浊积岩成岩作用[J].地质通报,2013,32(9):1477-1483. |
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| 作者姓名： | 冯娟萍 王若谷 尚 婷 |
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| 作者单位： | 1. 西安科技大学地质与环境学院,陕西西安,710054
2. 延长石油(集团)有限责任公司研究院,陕西西安,710075 |
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| 基金项目： | 陕西省教育厅专项科研计划项目 |
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| 摘 要： | 根据砂岩薄片、铸体薄片、扫描电镜、压汞等分析,对富县—黄陵县地区上三叠统延长组长6及长7油层组的浊积岩岩石学特征、成岩作用类型及其对孔隙的影响进行了研究.研究结果表明,该区长6及长7浊积岩主要为细粒长石砂岩.压实作用、胶结作用、交代作用和溶解作用是控制浊积岩储层物性演化的主要成岩作用,其中压实作用和胶结作用强烈破坏了浊积岩的原生孔隙,它们造成的平均孔隙度丧失分别为23.1％和6.5％,但早成岩阶段绿泥石薄膜的形成使浊积岩的一些原生孔隙得以保存.溶解作用和交代作用有效地改善了浊积岩的孔隙结构,从而提高了浊积岩储层的孔渗条件.
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| 关 键 词： | 富县—黄陵县地区 上三叠统延长组 浊积岩 成岩作用 储层物性 |
Diagenesis of Chang 6 and Chang 7 turbidite reservoirs of the Upper Triassic Yanchang Formation in Fuxian and Huangling areas, Ordos Basin |
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| FENG Juan-ping,WANG Ruo-gu,SHANG Ting.Diagenesis of Chang 6 and Chang 7 turbidite reservoirs of the Upper Triassic Yanchang Formation in Fuxian and Huangling areas, Ordos Basin[J].Geologcal Bulletin OF China,2013,32(9):1477-1483. |
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| Authors: | FENG Juan-ping WANG Ruo-gu SHANG Ting |
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| Institution: | 1. College of Geology and Environment, Xi'an University of Science and Technology, Xi'an 710054, Shaanxi, China;
2. Research Institute of Yanchang Petroleum (Group) Co. Ltd., Xi'an 710075, Shaanxi, China |
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| Abstract: | Based on the data analysis of thin-section, casting lamella, scan electronmicroscope and intrusive mercury etc, the characteristics of lithology and diagenesis are researched on the Upper Triassic Chang 6 and Chang 7 turbidite reservoirs and analyzed their influence on the reservoirs quality of Fuxian and Huangling areas in Ordos Basin. It is shown that the sandstones are granule arkose, which were formed by four types diagenesis that were compaction, cementation, metasomatism and dissolution. It is suggested that the compaction and cementation resulted in lossing primary porosity of the turbidites, and the porosity loss caused by compaction and cementation are 23.1% and 6.5%, respectively. But due to thin film of chlorite occurred around clastic granules, a part of primary intergranular pore were preserved, and a large of secondary pore were formed with dissolution and metasomatism, which improved the reservoir quality for the turbidites. |
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| Keywords: | Fuxian-Huangling area Yanchang Formation of Upper Triassic turbidite diagenesis reservoir quality |
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