东西准噶尔火山岩成因类型与油气勘探方向  

Genetic Types and Hydrocarbon Exploration Directions of Volcanic Rocks in Eastern and Western Junggar

作　　者：吴晓智[1] 齐雪峰[2] 唐勇[2] 李伯华[1] 

机构地区：[1]中国石油勘探开发研究院,北京100083 [2]中国石油新疆油田分公司勘探开发研究院,新疆克拉玛依市834000

出　　处：《中国石油勘探》2009年第1期1-9,共9页China Petroleum Exploration

基　　金：国家“973”项目火山岩油气藏形成机制与分布规律(2009C8219304)

摘　　要：东西准噶尔地区石炭系—二叠系火山岩已成为现实的油气勘探接替层系。勘探实践证实,石炭系—下二叠统火山岩油气成藏多遵循"源控论";区域构造演化是通过控制石炭系生烃凹陷发育、烃源岩展布,进而控制油气成藏与分布。西准噶尔石炭系火山岩为一套海陆交互的中基性火山岩组合,具汇聚岛弧过渡壳火山岩的特点。东准噶尔石炭系火山岩为一套基性、中酸性岩石组合,具早期岛弧挤压、晚期板内伸展环境特征。二叠系火山岩均为碰撞期后板内伸展构造环境。石炭纪生烃凹陷与烃源岩主要发育于东准噶尔克拉美丽岛弧带前后缘,形成自生自储;二叠纪生烃凹陷与烃源岩主要发育于西北缘断裂带、东缘三塘湖弧后伸展盆地,分割性强,形成多套自生自储生储盖组合。围绕有效生烃灶继承性构造发育带—西准噶尔西北缘断裂带(克—百断裂带、红—车断裂带)、东准噶尔克拉美丽造山带(库普—三塘湖盆地、北三台凸起—吉木萨尔凹陷、大井—石钱滩地区)、北准噶尔(覆盖区)陆东—五彩湾地区与莫北凸起,是石炭—二叠系火山岩油气藏勘探方向及重要领域。The Carboniferous-Permian volcanic rocks in eastern and western Junggar have evolved into the practical hydrocarbon exploration displacement series of strata. Practice shows that the reservoir formation of the Carboniferous-Permian volcanic rocks is mostly based on the 'source control theory', as well as the reservoir formation and distribution is controlled by regional structural evolution, i.e., the control of the development of Carboniferous hydrocarbon generating sags and the distribution of source rocks. The Carboniferous volcanic rocks in western Junggar belong to systematic marine and continental intermediate-basic volcanic rock assemblages and are characterized by the convergence of island-arc transitional crust volcanic rocks. The Carboniferous volcanic rocks in eastern Junggar belong to basic and intermediate-acid rock assemblages and are characterized by early island-arc compression and late intraplate extension. Permian volcanic rocks are formed by intraplate extension after collision stage. The Carboniferous hydrocarbon generating sags and source rocks are mainly formed in the anterior and posterior margin of the Kelameili island-arc belt in eastern Junggar. The Permian hydrocarbon generating sags and source rocks are mainly formed in the back-arc extensional basin in the fault zone in northwestern margin and the Santanghu area in eastern margin. The target and domains of exploration for oil and gas in Carboniferous-Permian volcanic rocks are around the development zones of inherited structures, i.e., the fault zone in northwestern margin of western Junggar (the Karamay-Baikouquan fault zone and the Hongshanzui-Chepaizi fault zone), the Kelameili orogenic zone in eastern Junggar (the Kupu-Santanghu Basin, the Beisantai bulge-Jimusaer sag, the Dajing-Shiqiantan area), the Ludong-Wucaiwan area and Mobei bulge in northern Junggar.

关 键 词：火山岩 构造环境 勘探方向 有利区带 石炭系-二叠系 东西准噶尔 

分 类 号：TE112.222[石油与天然气工程—油气勘探]