| 鄂尔多斯盆地东部下奥陶统白云岩成因及储集特征 |
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| 引用本文： | 覃建雄 杨俊杰. 鄂尔多斯盆地东部下奥陶统白云岩成因及储集特征[J]. 石油与天然气地质, 1994, 15(4): 275-284 |
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| 作者姓名： | 覃建雄 杨俊杰 |
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| 作者单位： | 成都理工学院沉积地质研究所，长庆石油勘探局勘探开发研究院 |
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| 摘 要： | 鄂尔多斯盆地东部下奥陶统碳酸盐岩白云岩化可划分为蒸发泵-渗透回流白云岩化、混合水(早期和晚期)白云岩化、埋藏压宾流(非脉状)铁白云岩化和构造热液(脉状)白云岩化四种成因模式.成岩早期混合水粉晶(颗粒)白云岩和中晶残余颗粒白云岩平均孔隙度2.64%,渗透率7.5×10-3μm2,是区内主要的储集岩,后生期铁白云石脉与油气藏分布具明显的一致性,发育H2O、CO2气液包裹体和烃类气液两相流体包裹体,是寻找油气的重要线索.
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| 关 键 词： | 沉积相 成因 沉积地球化学 矿物包裹体 白云岩化 模式 储集特征 |
ORIGIN OF LOWER ORDOVICIAN DOLOMITITE IN EASTERN ORDOS BASIN AND ITS RESERVOIR PROPERTIES |
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| Qin Jianxiong, Zeng Yunfu. ORIGIN OF LOWER ORDOVICIAN DOLOMITITE IN EASTERN ORDOS BASIN AND ITS RESERVOIR PROPERTIES[J]. Oil & Gas Geology, 1994, 15(4): 275-284 |
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| Authors: | Qin Jianxiong Zeng Yunfu |
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| Abstract: | Dolomitization of carbonate rocks of Lower Ordovician in Eastern Ordos Basin can be classified into following four types: evaporative pumping-percolative reflux dolomitization, mixed water dolomitization (early and late diagenetic stages), deep-burial compaction-hypogenic thermal brine dolomitization and tectonic hydrothermal brine dolomitization. The former is genetically associated with evaporites and possesses plenty of Cl |
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