酒泉盆地南缘推覆构造特征及油气勘探方向
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摘要
酒泉盆地南缘推覆构造是玉门油田今后勘探突破的一个关键地区。在概述了国内外逆掩推覆构造油气勘探的现状及面临的普遍性问题的基础上,分析了酒泉盆地南缘推覆构造的特殊性和油气藏分布规律,并就今后的勘探方向和地震构造解释方法提出了建议.酒西地区在勘探推覆构造带前缘地带的同时,还需向推覆构造的内部和下部发展,在青西凹陷寻找构造裂缝复杂油气藏,在寻找以白垩系为油源的油气藏的同时,还要考虑石炭-二叠系生油的可能性;在酒东地区的生油凹陷内应注意自生自储型油气藏的勘探;充分利用遥感、野外地质、区域地质、地球物理资料建立研究区的构造模型,利用钻井、地震资料建立地质-地震模型,利用平衡剖面反演和地震模拟正演技术对上述模型进行独立模拟,通过不断的修改,获得合理的构造解释。
The nappe structure in southern margin of Jiuquan basin is a key area that needs to break-through for further petroleum exploration in Yumen oilfield.This paper outlined the status of overthrust nappe structure for petroleum exploration and prevalent issues at home and abroad,presented special property of nappe structure in southern margin of Jiuquan basin and its oil and gas pool distributive patterns,and made suggestions for its further exploratory orientations and seismic fractural interpretation methods:①to explore the nappe structure in frontal zone of western Jiuquan basin while exploring the inner and below it,that is,to find structure-complicated oil pool in Qingxi sag,dominated by Cretaceous-sourced reservoir while considering possibility of Carboniferous-Permian as source rocks;②in source sag of eastern Jiuquan basin,exploration of self-source and self-reservoir oil and gas pool should be paid attention to;③to gain rational and proper struc-tural interpretation by using various techniques such as remote sensing,field geology,regional geology,struc-tural model developed with geophysical data,geology-seismic model developed with drilling and seismic data and equilibrium profile inversion as well as seismic forward modeling and etc.
The nappe structure in southern margin of Jiuquan basin is a key area that needs to break-through for further petroleum exploration in Yumen oilfield.This paper outlined the status of overthrust nappe structure for petroleum exploration and prevalent issues at home and abroad,presented special property of nappe structure in southern margin of Jiuquan basin and its oil and gas pool distributive patterns,and made suggestions for its further exploratory orientations and seismic fractural interpretation methods:①to explore the nappe structure in frontal zone of western Jiuquan basin while exploring the inner and below it,that is,to find structure-complicated oil pool in Qingxi sag,dominated by Cretaceous-sourced reservoir while considering possibility of Carboniferous-Permian as source rocks;②in source sag of eastern Jiuquan basin,exploration of self-source and self-reservoir oil and gas pool should be paid attention to;③to gain rational and proper struc-tural interpretation by using various techniques such as remote sensing,field geology,regional geology,struc-tural model developed with geophysical data,geology-seismic model developed with drilling and seismic data and equilibrium profile inversion as well as seismic forward modeling and etc.
引文
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[3]李相博,王新民,袁剑英,等.青藏高原东北部旋卷(扭)构造变形遥感探测及其地球动力学与油气地质意义[J].大地构造与成矿学,2001,25(2):120-127.
[4]李相博,袁剑英,林卫东,等.国内外中小盆地油气富集规律及勘探经验[J].新疆石油地质,2001,22(2):163-166.
[5]黄华芳,郑国东,方国庆,等.酒西盆地南缘推覆构造及其含油领域[J].石油与天然气地质,1993,14(3):181-190.
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