| 李坤,赵锡奎,王国芝,邓广军,吕志洲.龙门山中段前山带构造特征及含油气性研究[J].地质找矿论丛,2006,(4):282-287 |
| 龙门山中段前山带构造特征及含油气性研究 |
| STUDY ON STRUCTURAL FEATURES AND PRESENCE OF OIL IN THE FORE-MOUNTAIN BELT OF THE MIDDLE LONGMEN MOUNTAINS |
| 投稿时间：2005-05-18 修订日期：2006-08-12 |
| DOI：10.6053/j.issn.1001-1412.2006.4. 011 |
| 中文关键词: 龙门山中段 构造特征 隐伏构造 油气 |
| 英文关键词:the middle segment of Longmen mountains tectonic characteristics lie concealed structure oil & gas |
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| 中文摘要: |
| 文章讨论了龙门山中段前山带的横向构造特征和纵向构造变形层次,并从构造演化角度重点分析了大圆包隐伏构造的油气赋存条件。研究表明,本区构造变形始于印支期,止于喜马拉雅晚期,主要发育浅层次脆性变形的推覆构造、以彭灌飞来峰群为代表的滑覆构造以及滑脱构造。大圆包构造为推覆体之下的隐伏构造圈闭,印支期-燕山早期隆起带上的正向古构造圈闭是早期油气聚集的关键,晚期构造裂缝改善了超致密砂岩的储集条件,生储盖组合良好,具有较好的油气勘探前景。 |
| 英文摘要: |
| This paper discussed the horizontal structural feature and vertical tectonic arrangement in the fore-mountain belt of the middle Longmen mountains,and analysed the investitive condition of oil and gas in the Dayuanbao concealed structure from structural evolution.The structural distortion started in Indosinian and ended in the afternoon of Himalayan.There are thrust nappe,gliding nappe showed by Peng-guan klippes and detachment nappe in this section.Dayuanbao structure is a concealed structure trap under the thrust.The key of early collection is the paleo-synform structure trap forming on Indosinlan-Himalayan the uplift belt.Terminal tectonic crack improved the oil collection and accumulation condition of the hypercompact sandstone.The source-reservior-cap assemblage is good.In a word,Dayuanbao struture has preferable prospect of oil & gas exploration. |
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