松辽盆地朝长地区扶余油层的构造演化  

Structural Evolution of Fuyu Reservoir in the Chaochang Area of Songliao Basin

作　　者：陈昭年[1] 王小敏[1] 陈珊[1] 沈旭友[2] 

机构地区：[1]中国地质大学能源学院,北京100083 [2]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：《现代地质》2008年第4期512-519,共8页Geoscience

基　　金：国家自然科学基金项目(40672087);中国石油天然气总公司大庆油田分公司勘探项目(3-4-07-134)

摘　　要：扶余油层是松辽盆地朝长地区开发的主要目的层段,确定其幕式构造运动期次及其构造变形历史,对于圈闭形成演化、油气成藏分析以及外扩挖潜均具有十分重要的现实意义。通过构造发育史剖面图和古构造图编制,确定朝长地区扶余油层的幕式构造运动期次和构造变形特征。研究表明,朝长地区泉头组扶余油层自沉积开始至嫩江组沉积期为统一的坳陷区,其后经历了嫩江期末、明水期末、古近纪末3个主要的幕式构造运动期次。朝长地区的构造变形总体呈现东强西弱、南强北弱的特点。嫩江晚期至期末在朝长地区东南部形成构造雏形;明水期末形成构造幅度较高的长春岭背斜带和低幅度的朝阳沟阶地;古近纪末长春岭背斜带定型,发育长春岭、三站和五站背斜,而定型的朝阳沟阶地由朝阳沟背斜、翻身屯背斜等组成。The Fuyu reservoir is the intended interval of exploration in the Chaochang area of Songliao Basin. Confirming the stages of tectonic movement and the structural deformation history of Fuyu reservoir is significant for analyzing the formation and evolution of trap and petroleum accumulation and outsteping. We confirmed the stages of tectonic movements and the feature of structural deformation through mapping the structural evolution sections and palaeostructure maps. It is believed that from the beginning of depositing Fuyu reservoir is an uni- fied downwarping region until the end of deposition of Nenjiang Formation, after that the reservoir underwent three main stages of tectonic movements, including the end of Nenjiang Formation, the end of Mingshui Forma- tion and the end of Paleogene. The structural deformation of the Chaochang area is intensive in the east and south. The structural miniature was formed in the southeast of the Chaochang area at the end of Nenjiang Forma- tion. The Changchunling anticlinal belt, which has higher structural latitude, and the Chaoyanggou terrace, which has lower structural latitude, were formed at the end of Mingshui Formation. The Changchunling anticli- nal belt was shaped at the end of Paleogene, which has three anticlines, including Changchunling, Sanzhan and Wuzhan anticlines. And the shaped Chaoyanggou terrace belt was composed of Chaoyanggou and Fanshentun anticlines.

关 键 词：扶余油层 构造演化 构造变形 朝长地区 松辽盆地 

分 类 号：TE121.2[石油与天然气工程—油气勘探]