塔河油田西部斜坡区加里东运动中期Ⅱ幕水文地貌特征及其对洞穴发育的控制  

Paleo-Hydrogeomorphic Characteristics of EpisodeⅡof Middle Caledonian Movement and Their Controls on Karst Cave Development in Western Slope Area of Tahe Oilfield

作　　者：张长建[1] 吕艳萍[1] 文欢 王震[1] 马海陇[1] ZHANG Changjian;LYU Yanping;WEN Huan;WANG Zhen;MA Hailong(Research Institute of Exploration and Development,Northwest Oilfield Company,Sinopec,Urumqi,Xinjiang 830011,China)

机构地区：[1]中国石化西北油田分公司勘探开发研究院,乌鲁木齐830011

出　　处：《新疆石油地质》2022年第2期135-144,共10页Xinjiang Petroleum Geology

基　　金：国家科技重大专项(2016ZX05053)。

摘　　要：为了认识塔河油田西部斜坡区上奥陶统覆盖区加里东运动中期Ⅱ幕岩溶作用对岩溶洞穴发育的控制机理,选择不同方法精细刻画加里东运动中期Ⅱ幕水文地貌及地下岩溶洞穴系统。结果表明:岩溶台地以溶丘洼地为主,地表水系表现为树枝状,暗河洞穴体系发育,形成“开放型”暗河岩溶系统;岩溶斜坡以丘丛沟谷为主,强烈的垂向侵蚀作用发育深切沟谷,形成“下降型”埋藏断控岩溶系统;台缘南部岩溶盆地地势平缓,地表径流不发育,垂向侵蚀作用弱,以水平溶蚀为主,形成“上升型”埋藏断控岩溶系统。综合水文地貌发育特征,建立塔河油田西部斜坡区良里塔格组覆盖区加里东运动中期Ⅱ幕特殊水文地貌控制下的岩溶洞穴发育模式,为下一步滚动开发实践提供地质依据。In order to understand the mechanism that the karstification during the EpisodeⅡof the Middle Caledonian movement controlled the development of karst caves in the Upper Ordovician coverage area in the western slope area of Tahe oilfield,the paleo-hydrogeomorphic and underground karst cave system of the EpisodeⅡof the Middle Caledonian movement were precisely described using different methods.The results show that the karst platform is dominated by karst hills and depressions,the surface water system is dendritic,and the underground river-cave system is developed,forming an“open”underground river-karst system.The karst slope is dominated by hills and valleys,and deep incised valleys are developed because of strong vertical erosion,forming a“downward”buried fault-controlled karst system.The karst basin in the southern part of the platform margin is flat and the surface runoff is underdeveloped,with weak vertical erosion,but mainly horizontal dissolution,forming a“rising”buried fault-controlled karst system.Based on the paleo-hydrogeomorphic characteristics,the development model of karst caves under the control of special hydrogeomorphology of the EpisodeⅡof the Middle Caledonian movement was established for the Lianglitage formation coverage area in the western slope area of Tahe oilfield,which provides a geological basis for subsequent rolling development.

关 键 词：塔河油田 加里东运动 古水文地貌 岩溶洞穴 古水系 洞穴系统 断控岩溶 

分 类 号：TE122.221[石油与天然气工程—油气勘探]