新疆天山南北两侧大型叠合盆地石炭纪的连通性  

Carboniferous connexity of large scale superimposed basin on both sides of Xinjiang Tianshan Mountains

作　　者：康德江[1] 

机构地区：[1]大庆油田有限责任公司勘探开发研究院,黑龙江大庆163712

出　　处：《中南大学学报（自然科学版）》2009年第4期1139-1145,共7页Journal of Central South University:Science and Technology

基　　金：国家"973"重点基础研究项目(2006CB202308)

摘　　要：对新疆天山南北两侧的大型复杂叠合盆地经过综合整理、分析地化、地球物理和古生物等发现,由于双峰式岩系、含强不相容元素的玄武岩存在,以及航磁异常,推测准噶尔盆地的基底性质应该属于陆壳或以陆壳为主体,其年代应该至少不晚于前寒武纪。结合巨厚的中石炭统沉积、深水耕作迹的存在以及古地貌的变迁等证据,推测准噶尔盆地在石炭纪应该是与塔里木等周边盆地大体相连,两者至少在石炭纪时期是相互联通的,具有相似的沉积环境,应该具有较类似的沉积物质基础。综合考虑油气成藏要素可知,噶尔盆地石炭系地层能够具有与塔里木盆地石炭系相近的生烃能力,具有较强的生排烃及储集能力,油气蕴藏潜力巨大,可以作为深层油气勘探的潜在接替层位。Based on the large scale superimposed basin on the both sides of Xinjiang Tianshan mountains, the geochemistry, geography and paleontology were studied. The results show that because of double peak petrographic series, existence of basalt containing antipathic elements and aeromagnetic anomaly, the floor or the mainbody characteristic of Junggar basin should be continental crust and its period is not later than Precambrian. Combined with much evidences, such as gigantic thickness deposition of middle Carboniferous series, existence of farming and palaeogeomorpholoic variance the content argued Junggar basin and Tarim basin should be connected on the whole in Carboniferous. And at the same time, they should have similar depositional environment, therefore, they have the homologous depositional matter foundation. Considering the hydrocarbon accumulation elements synthetically, Carboniferous stratum in Junggar basin may have the generation potential of hydrocarbon like that in Tarim basin. It has better capacity of generation and preservation and also shows the enormous potentials of oil-gas reservoir. Carboniferous stratum in Junggar basin can become the potential vicarious stratum as the deep layer exploration.

关 键 词：叠合盆地 石炭系 连通性 基底 准噶尔盆地 

分 类 号：TE121.31[石油与天然气工程—油气勘探]