| 下寺湾油田延长组长7油层成藏地质特征分析 |
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| 引用本文： | 李云,韩旭,牛志忠,李晶,何剑,乔玉兰.下寺湾油田延长组长7油层成藏地质特征分析[J].西北地质,2014(1):249-254. |
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| 作者姓名： | 李云 韩旭 牛志忠 李晶 何剑 乔玉兰 |
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| 作者单位： | 陕西延长石油(集团)有限责任公司油气勘探公司;长安大学;长庆油田分公司勘探开发研究院;长庆油田分公司第六采油厂;西安地质调查中心; |
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| 基金项目： | 中国博士后基金“鄂尔多斯盆地南部延长组特低渗储层精细评价及地质模型研究”(20070420489) |
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| 摘 要： | 下寺湾油田长7油层浊积砂体连片分布,储层物性较好,形成较好的储集体,其上长64—长63泥岩与凝灰质泥岩发育,形成良好的区域及其局部的盖层。长7底部油页岩为优质烃源岩,有机质丰度高,有机质类型为Ⅰ型(腐泥型)-Ⅱ1(腐殖-腐泥型);长7油层生储盖匹配良好,形成自生自储式复合油藏(岩性、裂缝油藏),连通孔隙及砂体叠置点、裂缝为油气进行运移的重要通道。延长组长7油层是鄂尔多斯盆地东南部继延长组长6、长2外新的勘探领域,具有良好的勘探前景。
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| 关 键 词： | 成藏特征 长7油层 下寺湾 鄂尔多斯 |
Geology Characteristics of Chang-7 Reservoir of Yanchang Formation in Xiasiwan Oil field |
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| Institution: | LI Yun ,Han Xu , Niu Zhi-zhong, LI Jing , HE Jian , QIAO Yu-lan (1. Oil and Gas Exploration Company, Yanchang Petroleum (Group) Co. Ltd , Yantan 716001, China ; 2. Research Institute of Exploration and Development, Changqing Oil field, PetroChina, Xi＇an 710021, China; 3. No. 6 Oil Production Plant, Changqing Oil field Company, PetroChina, Xi＇an 710021, China; 4. Chang＇an University, Xitan 710021, China; 5. Xilan Center of Geological Survey, China Geological Survey, Xilan 710054, China) |
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| Abstract: | Turbidite sand body distributed all over in Chang-7 reservoir of Xiasiwan oil field. The reservoir physical property is good enough to form a better reservoir body. Mudstone and tuff development in Chang-64 and Chang-63 formed a good cover for the area. The bottom oil shale of Chang-7 reservoir is high-quality hydrocarbon source rocks with abundant organic matters, which are Type I （sapropel type） -Type Ⅱ1 （humic-sapropelic type）; the perfect source-reservoir-cap matching of Chang-7 reservoir lead to the formation of composite oil reservoir（lithology and fracture reservoir） with its source and reservoir in the same coal seam. Connecting pores, superimposed points of sand bodies, and cracks are important channels for oil-gas migration. Except for Chang-6 and Chang-2 reservoir, Chang-7 reservoir is a new exploration area in southeastern Ordos basin, and has promising exploration prospect. |
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| Keywords: | reservoir characteristics Chang-7 reservoir Xiasiwan Ordos basin |
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