塔里木盆地于奇地区三叠系—侏罗系地层沉积相研究
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摘要
前人对塔里木盆地于奇地区三叠系—侏罗系地层沉积相类型的认识存在较大分歧。在野外剖面观测及钻井岩心观察的基础上,结合岩石颜色、沉积构造、剖面结构、测井相和地震响应等沉积相识别标志认为,该区三叠系—侏罗系地层发育湿地扇三角洲—湖泊沉积体系。对该体系进一步作时空演化系统分析,结果表明:于奇地区三叠纪—侏罗纪古气候湿润,物源主要来自沙雅隆起剥蚀区南缘;三叠系—侏罗系地层可识别出湿地扇三角洲和湖泊沉积相;由于印支运动构造抬升,导致该区缺失三叠系上统地层的顶部、侏罗系中统和上统地层,仅侏罗系下统地层发育湿地扇三角洲平原相。通过此研究,可以更好地了解于奇地区三叠纪—侏罗纪地层的沉积环境,为该区下一步油气勘探提供基础地质资料。
Based on detailed field outcrop profiles and the core drilling observation,combining with the rock color,sedimentary structures,profile structures,log facies and seismic response,the sedimentary facies of Triassic-Jurassic formation in Yuqi area of Tarim Basin was analyzed,which is wet fan delta-lacustrine sedimentary system.The time and space evolution analysis result shows that during Triassic to Jurassic,the climate is humid,and the main sources come from the southern margin of Shaya uplift.There are two set of complete depositional cycles in Triassic formation,which are wet fan delta and lake.And due to the tectonic uplift of Indosinian movement,the top of Triassic formation and the Upper-Middle Jurassic formation are absent.Wet fan delta plain is developed in the Lower Jurassic formation.The research results are useful to understand the depositional environment during the period of Triassic to Jurassic,and can provide basic geologic data for oil and gas exploration in this area.
Based on detailed field outcrop profiles and the core drilling observation,combining with the rock color,sedimentary structures,profile structures,log facies and seismic response,the sedimentary facies of Triassic-Jurassic formation in Yuqi area of Tarim Basin was analyzed,which is wet fan delta-lacustrine sedimentary system.The time and space evolution analysis result shows that during Triassic to Jurassic,the climate is humid,and the main sources come from the southern margin of Shaya uplift.There are two set of complete depositional cycles in Triassic formation,which are wet fan delta and lake.And due to the tectonic uplift of Indosinian movement,the top of Triassic formation and the Upper-Middle Jurassic formation are absent.Wet fan delta plain is developed in the Lower Jurassic formation.The research results are useful to understand the depositional environment during the period of Triassic to Jurassic,and can provide basic geologic data for oil and gas exploration in this area.
引文
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[6]旷理雄,郭建华,黄太柱,等.塔里木盆地于奇地区奥陶系碳酸盐岩成藏条件及成藏模式[J].石油勘探与开发,2007,34(3):299-303.
[7]周文斌,旷理雄.塔里木盆地阿克库勒凸起于奇探区三叠系油气成藏条件与成藏模式[J].天然气地球科学,2007,18(5):667-672.
[8]何幼斌,王文广.沉积岩与沉积相[M].北京:石油工业出版社,2007:157-158.
[9]罗志立,张景廉,石兰亭.“塔里木—扬子古大陆”重建对无机成因油气的作用[J].岩性油气藏,2008,20(1):124-128.
[10]汤良杰.塔里木盆地构造演化与构造样式[M].北京:地质出版社,1996:64-65.
[11]邓胜徽.中生代主要植物化石的古气候指示意义[J].古地理学报,2007,9(6):559-574.
[12]李健,张同兴.油气探井完井地质总结报告编写指南[M].北京:石油工业出版社,2001:26-31.
[2]顾家裕,何斌.塔里木盆地轮南地区三叠系扇三角洲沉积与储集层研究[J].沉积学报,1994,12(2):54-62.
[3]张希明,刘青芳.塔北地区辫状三角洲沉积特征及油气勘探意义[J].石油勘探与开发,1999,26(1):21-24.
[4]刘海兴,秦天西,杨志勇.塔里木盆地三叠—侏罗系沉积相[J].沉积与特提斯地质,2003,23(1),37-44.
[5]纪云龙,丁孝忠,李喜臣,等.塔里木盆地库车坳陷三叠纪沉积相与古地理研究[J].地质力学学报,2003,21(3):268-274.
[6]旷理雄,郭建华,黄太柱,等.塔里木盆地于奇地区奥陶系碳酸盐岩成藏条件及成藏模式[J].石油勘探与开发,2007,34(3):299-303.
[7]周文斌,旷理雄.塔里木盆地阿克库勒凸起于奇探区三叠系油气成藏条件与成藏模式[J].天然气地球科学,2007,18(5):667-672.
[8]何幼斌,王文广.沉积岩与沉积相[M].北京:石油工业出版社,2007:157-158.
[9]罗志立,张景廉,石兰亭.“塔里木—扬子古大陆”重建对无机成因油气的作用[J].岩性油气藏,2008,20(1):124-128.
[10]汤良杰.塔里木盆地构造演化与构造样式[M].北京:地质出版社,1996:64-65.
[11]邓胜徽.中生代主要植物化石的古气候指示意义[J].古地理学报,2007,9(6):559-574.
[12]李健,张同兴.油气探井完井地质总结报告编写指南[M].北京:石油工业出版社,2001:26-31.
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