| 松辽盆地长岭断陷盆地断陷期构造转换及油气地质意义 |
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| 引用本文： | 陈娟,张庆龙,王良书,解国爱,徐士银,毕素萍,葛荣峰.松辽盆地长岭断陷盆地断陷期构造转换及油气地质意义[J].地质学报,2008,82(8):1027-1035. |
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| 作者姓名： | 陈娟 张庆龙 王良书 解国爱 徐士银 毕素萍 葛荣峰 |
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| 作者单位： | 南京大学地球科学系,南京,210093 |
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| 基金项目： | 本文为中国石化东北勘探新区项目管理部（编号 dkky0616）资助成果。 |
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| 摘 要： | 本文以平衡剖面理论为指导，对松辽盆地长岭断陷3条近东西走向的剖面进行了研究。结果表明，长岭断陷盆地在火石岭期初始张裂，沙河子期、营城期断陷强烈扩张，伸展速率均在沙河子期最大，分别为907.50 m/Ma、1373.90 m/Ma和1100.00 m/Ma，两次扩张末期都伴有构造反转。沙河子末期最大缩短量达2.11 km，缩短率2.89%；营城末期最大缩短量达2.26 km，缩短率3.21%。登娄库期断陷开始向坳陷转化，泉头期—嫩江期为断陷期后热冷却沉降，表现为弱伸展作用，随后进入嫩江末期以挤压作用为主的反转构造发育期。沙河子组、营城组既是主力源岩，又是优质盖层和储层，构成了近烃源自生自储式成藏组合。在沙河子末期、营城末期构造运动形成的大范围的低幅褶皱构造是成藏有利区块。
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| 关 键 词： | 松辽盆地南部 长岭断陷 平衡剖面 构造转换 反转构造 油气成藏 |
| 收稿时间： | 2008/1/16 0:00:00 |
| 修稿时间： | 2008/5/26 0:00:00 |
Tectonic Transformation of Changling Fault Depression in the Southern Songliao Basin and Its Significance of Hydrocarbon Accumulation |
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| CHEN Juan,ZHANG Qinglong,WANG Liangshu,XIE Guoai,XU Shiyin,BI Suping,GE Rongfeng.Tectonic Transformation of Changling Fault Depression in the Southern Songliao Basin and Its Significance of Hydrocarbon Accumulation[J].Acta Geologica Sinica,2008,82(8):1027-1035. |
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| Authors: | CHEN Juan ZHANG Qinglong WANG Liangshu XIE Guoai XU Shiyin BI Suping GE Rongfeng |
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| Abstract: | Three typical near EW-trending cross-sections of Changling fault depression in the Songliao basin were studied using the theory of balanced cross-sections. The analysis indicates that rifting of the basin started in Huoshiling period and subsided intensively in Shahezi and Yincheng periods,with extension rates of 907.50 m/Ma,1373.90 m/Ma,and 1100.00 m/Ma respectively,peaking at the Yincheng period. Structural shortening also took place at the end of the two extension periods,with a maximum and ratio of shortening 2.11 km and 2.89% in the former and 2.26 km and 3.21% in the latter. The basin started to transform from faulting depression to subsiding depression in Denglouku period,to post-rifting cooling subsidence in ing the Quantou-Nenjiang period,characterized by weak extension,and to a stage of inverse structure development,characterized by compression at the end of the Nenjiang period. The Shahezi and Yingcheng Groups,as both major rock,and cover/reservoir rocks,formed a unique assemblage for authigenic and self-storing hydrocarbon accumulation. Therefore,large-scale low-magnitude folding structure formed by tectonic activities at the end of Shahezi and Yincheng periods is a favorable zone for accumulation of oil and natural gas. |
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| Keywords: | southern Songliao Basin Changling fault depression balanced cross-sections tectonic transformation inversion structure oil and gas accumulation |
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