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| 南盘江盆地晚古生代盆地充填序列特征及生储盖组合划分 | |
| 引用本文： | 梅冥相,马永生,戴少武,吕廷志,张国常,王甘露,谭代友.南盘江盆地晚古生代盆地充填序列特征及生储盖组合划分[J].现代地质,2001,15(1):74-82. |
| 作者姓名： | 梅冥相 马永生 戴少武 吕廷志 张国常 王甘露 谭代友 |
| 作者单位： | 1. 中国地质大学 地球科学与资源学院, 2. 中国石油化工集团油田部, 3. 贵州石油地质研究所, |
| 基金项目： | 中国石油化工集团公司油田部南方海相油气勘探经理部资助项目(NP-4008)。 |
| 摘 要： | 以米级旋回层序为基本工作单元 ,米级旋回层序在长周期三级层序中的有序叠加形式为基础 ,在南盘江盆地晚古生代地层中共识别出 2 5个三级层序 (沉积层序 ) ;以构造不整合面为准 ,又可进一步归为 4个二级层序 (构造层序 )。根据地层、沉积特征及构造地质涵义 ,把层序界面归纳为 4种类型 :构造不整合面、沉积不整合面、淹没不整合面以及它们的相关面 ,其中构造不整合面类似于类型 界面 ,沉积不整合面类似于类型 界面。晚古生代南盘江盆地存在两个明显的造礁期。于三级海平面上升阶段主要发育礁滩相灰岩构成的储层 ;而在与三级海平面下降相关的强迫型海退过程中则发育白云岩构成的储层。因此 ,可把南盘江盆地区域性的潜在生储盖组合拟定为 3个 :以孤立台地上泥盆系生物礁和加里东运动不整合面为主要勘探对象的下组合 ;以石炭系大埔组白云岩为主要勘探对象的中组合 ;以茅口组上部和长兴组生物礁及礁顶相白云岩、东吴运动不整合面为主要勘探对象的上组合 |
| 关 键 词： | 盆地充填序列 晚古生代 生储盖组合 南盘江盆地 |
| 文章编号： | 1000-8527(2001)01-0074-09 |
| 修稿时间： | 2000年7月14日 |
LATE PALEOZOIC FILLING SUCCESSION OF THE NANPANJIANG BASIN AND THE DIVISION OF ASSOCIATION OF OIL-GENERATING STRATA, RESERVOIR AND CAPPING BED |
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| Abstract: | On the basis of the regulary vertical stacking patterns ofmeter-scale cyclic-sequences in the quest for a fundamental unit of stratigraphy and sedimentology, 25 third-order sedimentary sequences that could be furtherly grouped into 4 second-order tectonic sequences are discerned in Late Paleozoic of the Nanpanjiang Basin. According with the natures of stratigraphy and sedimentology as well as the meanings on tectonics, sequence boundaries might be divided into four types: tectonic unconformity that is similar to type I boundary defined by Vail et al., sedimentary unconformity that is similar to type Ⅱ boundary, drowned unconformity and their relative surfaces. There are two reef-building periods in Late Paleozoic of the Nanpanjiang Basin, which are correspond to developing periods of regional oil-generating strata constituted by basin facies shales, so the well congenital forming condition of oil and natural gas is established. In generally, the reservoir constituted by reef and grain beach limestones is formed in the rising process of third-order sea-level changes, and the dolomitic reservoir is generated in forced-regression process resulted from the falling period of third-order sea-level changes. Based on the study on sequence stratigraphy, three regionally potential association of oil-generating strata, reservoir and capping bed could be discerned in Late Paleozoic of the Nanpanjiang Basin: the lower association which Caladonian unconformity and Devonian reefs developed in isolated platform constitute its main prospecting targets; the middle association which its main prospecting target refers to dolomitic reservoir of Carboniferous Dapu Formation; the upper association which its main prospecting targets include the unconformity of Dongwu revolution as well as reef limestones and reef-top dolomites of Middle Permian Maokou Formation, and reef limestones of Late Permian Changxing Formation in isolated carbonate platform. |
| Keywords: | filling succession of sedimentary basin Late Paleozoic association of oil generating strata and reservoir as well as capping bed the Nanpanjiang Basin |
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