| 楚雄盆地上三叠统深盆气成藏条件研究 |
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| 引用本文： | 张金亮,常象春,刘宝珺.楚雄盆地上三叠统深盆气成藏条件研究[J].沉积学报,2002,20(3):469-476. |
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| 作者姓名： | 张金亮 常象春 刘宝珺 |
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| 作者单位： | 1 青岛海洋大学地球科学学院,山东青岛,266003; |
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| 基金项目： | 国家科技攻关项目，国家攀登计划，96-110-01-04，95-预-39-3，， |
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| 摘 要： | 楚雄盆地经历了多次叠加和多期改造,但仍存在深盆构造区.上三叠统为海相和海～陆交互相含煤地层,烃源岩以泥岩、页岩为主,也有部分灰岩、泥灰岩和少量碳质泥岩、页岩及煤.煤系气源岩分布广、厚度大、热演化程度高,为楚雄深盆气的形成提供了充足的气源.直接接触的生储组合广布于盆地中,储层致密,对深盆气的聚集和富集成藏十分有利.气源岩在早白垩世中期-晚白垩世中期为湿气主要生成阶段,其后进入干气大量生成时期,成为深盆气形成的重要时期.喜山运动后盆地主体仍处于地下水交替停滞带,深盆气藏存在整体封存条件.从源岩演化程度和直接接触的生储组合来看,上三叠统形成了一个几乎覆盖全盆地的特大型深盆气藏.根据深盆气藏的主控地质因素的分析,可将楚雄盆地划分为深盆气分布区、气水过渡带和上倾含水区三个区带。
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| 关 键 词： | 深盆气藏 致密砂岩 运聚机理 上三叠统 楚雄盆地 |
| 文章编号： | 1000-0550(2002)03-0469-08 |
| 收稿时间： | 2001-06-22 |
| 修稿时间： | 2001年6月22日 |
Deep Basin Gas Accumulation in the Upper Triassic of Chuxiong Basin |
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| ZHANG Jin-liang,CHANG Xiang-chun,LIU Bao-jun.Deep Basin Gas Accumulation in the Upper Triassic of Chuxiong Basin[J].Acta Sedimentologica Sinica,2002,20(3):469-476. |
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| Authors: | ZHANG Jin-liang CHANG Xiang-chun LIU Bao-jun |
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| Institution: | 1 Ocean University of Qingdao,Qingdao Shandong,266003;2 Shandong University of Science and Technology,Qingdao Shandong,266500 |
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| Abstract: | Depositional settings of the upper Triassic of Chuxiong basin are favorable for the deep basin gas accumulation. The fluvial and deltaic deposits constitute the dominated reservoir in the deep basin. The numerous and mature coal beds and organic-rich shales associated intimately with reservoir rocks throughout the deep basin provide a prerequisite for deep basin gas accumulation. Gas has the tendency to be trapped in the deepest part of the basin and probably occupies low permeability reservoirs extensively. Gas generated in source rocks, moved into the adjacent sand layer and then slowly migrated updip. The filling process of deep basin gas lasted from the late Cretaceous to mid-Tertiary time. Gas may be located downdip of an aquifer which outcrops in basin margins. The gas accumulation of the upper Triassic of Chuxiong basin is predicted and interpreted based on the trapping mechanism of deep basin gas reservoir. The distribution of deep basin gas accumulation in the basin is described according to the key parameters controlling the ultimate trapping. |
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| Keywords: | deep basin trap tight sand trapping mechanisms Upper Triassic Chuxiong basin |
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