| 泌阳断陷双河-赵凹地区下第三系核三上段陆相层序发育的可容空间机制 |
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| 引用本文： | 胡受权.泌阳断陷双河-赵凹地区下第三系核三上段陆相层序发育的可容空间机制[J].沉积学报,1998,16(3):102-108. |
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| 作者姓名： | 胡受权 |
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| 作者单位： | 西南石油学院博士后流动站 四川南充 637001 |
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| 摘 要： | 泌阳断陷湖盆基底呈“反铰链式”构造沉降。在湖平面变化和构造沉降共同作用下，泌阳断陷湖盆陡坡带的可容空间变化仅有三种可能性:ａ．南缘及北缘减小，中央带增加；ｂ．南缘不变，中央带及北缘增加；ｃ．南缘、中央带及北缘均增加。针对这三种情况，分别在不同的物源供给速率条件下，分析了断陷湖盆陡坡带不同构造部位的剩余可容空间变化规律及沉积响应特征。文中探讨了参照井选择的可容空间机理；以泌207井作为参照井，对下第三系核三上段的陆相层序进行了划分；并采用Fischer图解法，作出了其实际可容空间变化曲线。
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| 关 键 词： | 构造沉降 湖平面变化 可容空间 Fischer图解 陆相层序 下第三系 泌阳断陷 |
| 收稿时间： | 1997-08-20 |
Accommodation Mechanics of Terrigenous Sequence Development in Fault-depressed Lacustrine Basin--A Case Study: the Upper Member of Eh3, Shuanghe-Zhaoao,Biyang Fault-depression |
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| Hu Shouquan.Accommodation Mechanics of Terrigenous Sequence Development in Fault-depressed Lacustrine Basin--A Case Study: the Upper Member of Eh3, Shuanghe-Zhaoao,Biyang Fault-depression[J].Acta Sedimentologica Sinica,1998,16(3):102-108. |
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| Authors: | Hu Shouquan |
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| Institution: | Petroleum Institute of Southwest, Nanchong Sichun 637001 |
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| Abstract: | In Biyang fault depressed lacustrine basin,the tectonic descent of basement presented antihinge typed subsidence.Due to the joint effect of lacustrine level change and basement structural subsidence,accommodation change in the steep slope zone of Biyang fault depressed lacustrine basin only have three possibilities:a.decreasing at southern and northern rim zone but increasing in central zone;b.being invariant at southern rim zone but increasing in central zone and at northern rim zone;c.all increasing at southern and northern rim zone and in central zone.In the light of the three cases,the sedimentation responsed charteristics to the accommodation variation law at different structural positions of the steep slope zone in fault depressed lacustrine basin have been respectively analysed at different recharge rate of sediment source.In this paper,accommodation mechanics to select reference well has been discussed;and by using well B207 as reference well,the terrigenous sequences of the upper member of E h 3 have been divided;and by using Fischer diagram,the realized accommodation change curve of the terrigenous sequences is acquired. |
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| Keywords: | tectonic descent\ lacustrine level change\ accommodation\ Fischer diagram\ terrigenous sequence\ Palaeogene\ Biyang fault depression |
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