地质科学
地質科學
지질과학
SCIENTIA GEOLOGICA SINICA
2010年
2期
490-499
,共10页
李相博%刘化清%陈启林%郭彦如%完颜容%魏立花%冯明%廖建波%马玉虎
李相博%劉化清%陳啟林%郭彥如%完顏容%魏立花%馮明%廖建波%馬玉虎
리상박%류화청%진계림%곽언여%완안용%위립화%풍명%료건파%마옥호
鄂尔多斯盆地%天环坳陷%构造演化%油气成藏
鄂爾多斯盆地%天環坳陷%構造縯化%油氣成藏
악이다사분지%천배요함%구조연화%유기성장
The Ordos Basin%Tianhuan depression%Tectonic evolution%Pool forming
鄂尔多斯盆地是我国陆上最重要的含油气盆地之一,本文以鄂尔多斯盆地西缘为研究对象,以地震反射资料为基础,主要采用地震剖面"层拉平"与"平衡剖面恢复"等技术手段,对天环坳陷形成与迁移演化历史进行了动态分析.研究结果表明: 1)天环坳陷最早形成于晚侏罗世,后期由于受燕山晚期及喜马拉雅山期构造运动影响,坳陷核部逐渐向东迁移至现今位置,前后累计迁移距离约30 km; 2)当坳陷核部向东迁移至有效烃源岩范围附近时,原先已形成的油气藏发生重新调整,油气向坳陷西翼高部位运移、聚集,从而形成了次生构造油气藏.
鄂爾多斯盆地是我國陸上最重要的含油氣盆地之一,本文以鄂爾多斯盆地西緣為研究對象,以地震反射資料為基礎,主要採用地震剖麵"層拉平"與"平衡剖麵恢複"等技術手段,對天環坳陷形成與遷移縯化歷史進行瞭動態分析.研究結果錶明: 1)天環坳陷最早形成于晚侏囉世,後期由于受燕山晚期及喜馬拉雅山期構造運動影響,坳陷覈部逐漸嚮東遷移至現今位置,前後纍計遷移距離約30 km; 2)噹坳陷覈部嚮東遷移至有效烴源巖範圍附近時,原先已形成的油氣藏髮生重新調整,油氣嚮坳陷西翼高部位運移、聚集,從而形成瞭次生構造油氣藏.
악이다사분지시아국륙상최중요적함유기분지지일,본문이악이다사분지서연위연구대상,이지진반사자료위기출,주요채용지진부면"층랍평"여"평형부면회복"등기술수단,대천배요함형성여천이연화역사진행료동태분석.연구결과표명: 1)천배요함최조형성우만주라세,후기유우수연산만기급희마랍아산기구조운동영향,요함핵부축점향동천이지현금위치,전후루계천이거리약30 km; 2)당요함핵부향동천이지유효경원암범위부근시,원선이형성적유기장발생중신조정,유기향요함서익고부위운이、취집,종이형성료차생구조유기장.
The Ordos Basin is one of the most important hydrocarbon prolific basins in China. Based on seismic data and horizon flatterning as well as seismic balance section technique,dynamic analysis regarding the formation and the history of the migration and evolution of the Tianhuan depression was conducted. Two main results were obtained: 1)The Tianhuan depression was primarily formed during the Late Jurassic and later it's axis migrated about 30 km eastward to current position due to the impact of the late Yanshan and Xishan tectonic movements; 2)When the axis of the depression moved near to the effective source rock area,the previous pool readjusted and the hydrocarbon migrated to and accumulated at the higher position of the west part of the Tianhuan depression and consequently secondary structural reservoirs were formed.
