| 鄂尔多斯盆地中部上古生界沉积相演化 |
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| 引用本文： | 张晓莉.鄂尔多斯盆地中部上古生界沉积相演化[J].地球科学与环境学报,2005,27(3):26-29,37. |
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| 作者姓名： | 张晓莉 |
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| 作者单位： | 长安大学,地球科学与国土资源学院,陕西,西安,710054 |
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| 摘 要： | 利用钻井资料和地质资料对鄂尔多斯盆地上古生界沉积相演化进行详细的研究。分析了本溪期（海侵）、太原期（海侵扩大）、山西期（海退）、石盒子期（海陆交互）和石千峰期（陆缘湖泊）等5个时期的古地理环境、岩石类型、沉积相类型和平面展布特征。得出这5个时期在盆地内构成了一个海侵海退旋回，形成了从滨浅海相到海陆过渡的三角洲相、河流湖泊相陆源沉积。控制生成了三角洲相分流河道砂砾岩、水下分流河道砂砾岩以及潮坪相砂坝等有利储集岩带，潮坪相发育的煤系地层为烃源岩。上石盒子组洪泛平原形成泥质岩盖层。生油岩和储集岩叠置或互侧式组合关系，形成本区受砂体分布控制的岩性气藏。
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| 关 键 词： | 鄂尔多斯盆地 沉积相 沉积演化 生储盖组合 上古生界 相演化 水下分流河道 上石盒子组 中部 平面展布特征 |
| 文章编号： | 1672-6561（2005）03-0026-04 |
| 收稿时间： | 2005-01-18 |
| 修稿时间： | 2005-01-18 |
Sedimentary facies evolution of Upper Palaeozoic formation in Ordos Basin |
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| ZHANG Xiao-li.Sedimentary facies evolution of Upper Palaeozoic formation in Ordos Basin[J].Journal of Earth Sciences and Environment,2005,27(3):26-29,37. |
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| Authors: | ZHANG Xiao-li |
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| Abstract: | This study of sedimentary facies evolution of the Upper Palaeozoic formation is based on drilling and geological information.It analyses palaeogeographic environment, rock type,sedimentary facies type and distribution in the Benxi Stage (incursion), Taiyuan Stage (incursion spread), Shanxi Stage (regression),Shihezi Stage (paralic) and Shiqianfeng Stage (continental lacustrine).As a result,these five stages formed a transgression and regrssive cycle including from coastal facies to delta facies,fluvial facies and lacustrine facies of continental sedimentary in marine-continental transition,and controlled the formation of the favorable reservoir facies which comprised delta facies distributary chanel psepholite,submerged distributary chanel psepholite and tidal flat facies bar.The hydrocarbon source rocks is coal-bearing strata in the tidal flat facies.The caprock is related to shaly rocks in the flood plain.The complicated overlapping and juxtaposition between the source and reservoir rocks caused the formation of lithologic gasses, which was largely controlled by sandbody distribution. |
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| Keywords: | Ordos Basin sedimentary facies sedimentary evolution source-reservoir-cap rock combinations |
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