巴彦呼舒凹陷原型盆地恢复及构造演化  

Recovery of the prototype basin and structural evolution for Bayanhushu Sag

作　　者：杨旭[1] YANG Xu(Exploration and Development Research Institute of Daqing Oilfield Co Ltd,Daqing 163712,China)

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：《大庆石油地质与开发》2020年第1期18-25,共8页Petroleum Geology & Oilfield Development in Daqing

基　　金：国家科技重大专项“大庆油气持续有效发展关键技术研究与应用”(2016E-0202)。

摘　　要：巴彦呼舒凹陷白垩纪受到多期构造活动的影响,后期反转改造强烈,盆地原型不清。从现今构造特征出发,通过地层残余真厚度求取、剥蚀量恢复及构造演化特征分析,对巴彦呼舒凹陷成藏关键期南屯组和伊敏组的原型盆地进行重建。研究认为:巴彦呼舒凹陷在铜钵庙组-南屯组的断陷时期,为统一湖盆,沉降中心在靠近陡坡带一侧;大磨拐河组-伊敏组的断坳时期,经历了2期挤压构造运动改造,在陡坡带形成规模较大的背斜构造;伊敏组末期的挤压构造反转活动,使凹陷地层抬升遭受剥蚀,沉降中心逐渐向缓坡带迁移,形成了现今3个次凹。The Cretaceous in Bayanhushu Sag was influenced by multi-stage tectonic activities, and the late reversal and reformation were rather strong, thus the basin prototype is not clear. From the viewpoint of the present structural characteristics, the prototype basins of Nantun and Yimin Formations in the key period of reservoir accumulation in Bayanhushu Sag were reconstructed through the analysis of the seeking of the formation residual true thickness, denuded amount recovery and tectonic evolution characteristics analysis. The studies show that Bayanhushu Sag was a unified lake basin from Tongbomiao Formation to Nantun Formation, the subsidence center was near the side of the steep slope zone;during the depression-broken period from Damoguaihe Formation to Yimin Formation, two-stage reformations of the compressive tectonic movement were engaged, and the large-scale anticline structures were formed in the steep slope zone;the compressive tectonic inversion in the end period of Yimin Formation caused the strata uplifted and denuded in the sag, the subsidence center gradually migrated to the gentle slope zone, and then three sub-sags have been formed up to now.

关 键 词：巴彦呼舒凹陷 原型盆地恢复 构造演化 

分 类 号：TE121.2[石油与天然气工程—油气勘探]