新疆西克尔地区下奥陶统鹰山组岩溶古地貌与古水系的关系

The Relationship between the Karst Paleomorphology of the Yingshan Formation of the Lower Ordovician and Palaeo-drainage Pattern in Xikeer，Xinjiang

冯海霞

FENG Haixia

中国石油化工股份有限公司胜利油田勘探开发研究院，山东东营　257015

Reserch Institute of Petroleum Exploration and Development, Shengli Oilfield, SINOPEC, Dongying Shandong 257015, China

在塔里木盆地中，为了有效预测岩溶储层的分布，前人已总结出一些方法，其中运用最广、最有效的方法是利用恢复后的古水系的发育特征来预测岩溶储层。因此，恢复古水系并掌握其发育规律是工作的核心。许多地区岩溶现象丰富，众多学者对岩溶区的实地考察形成了系统现代岩溶理论。西克尔野外露头区发育鹰山组岩溶，岩溶地貌表现为溶丘、垄岗、岩溶洼地、嶂谷和侵蚀-溶蚀沟谷组合，利用GPS沿现存河谷定位，综合地貌特征和河谷发育的继承性规律，实现对鹰山组古水系的恢复。运用现代岩溶理论，认识到岩溶古地貌与古水系有着密不可分的关系，即：洼地控制了岩溶水系的汇流方向；岩溶水系汇流方向形成三期岩溶地貌。

In the Tarim basin, the predecessors have summed up many methods to forecast the distribute of the reservoir, among which the most widely used and most effective methods is to use the development characteristic of the palaeo-drainage pattern restored, so restoring the palaeo-drainage pattern and mastering the development laws is the core of the work. Many areas are rich in karst phenomena and many scholars have built up systematic modern karst theory after field studying in karst areas.The Xikeer outcrops develop karst of Yingshan Formation, the karst topography is characterized by karst hill,mound,karst depression,collapse karst gorge and erosion-steephead group. GPS is used to locate along the existing river valleys, synthesizing the geomorphic feature and the inherited laws of river valley, then the palaeo-drainage pattern of the Yingshan Formation can be restored.Using modern karst theory, it is recognized that karst paleo-geomorphology and palaeo-drainage pattern are of intimate relationship, that is, depression controls the flow direction of karst water system and the flow direction of Karst water system forms three-stage of karst landforms.

国家重点基础研究“973”发展计划(2012CB214804)资助

https://doi.org/10.3969/j.issn.1008-2336.2020.03.001