中国石油大学学报（自然科学版）Issue(4)：10-18,9.DOI:10.3969/j.issn.1673-5005.2015.04.002
济阳坳陷西南端沙三段剥蚀厚度恢复及其区域构造意义
Estimation of eroded overburden and its tectonic significance of the third Member of Shahejie Formation in extreme southwest Jiyang Depression
摘要
Abstract
Using the physical geography and drilling well data, the eroded and original overbudens during the third Member of Shahejie Formation (Es3 ) in extreme southwest Jiyang Depression were estimated with a series of methods such as strati-graphic correlation, porosity fitting and the principle and methods of basin modeling. The tectonic subsidence and the exten-sion coefficient were then calculated, and the character of sedimentation and its main controlling factor were discussed. The results are as follows. First, the depocenter is NE-SW trending as a whole, but is locally nearly south-north trending during Es3 stage in the extreme southwest Jiyang Depression. Second, the extensional level is not uniform: the center is stronger and it weakens toward northwest and southeast. The extension is controlled by NW-SE trending stress field in general, and by south-north trending locally resulting from the slip of the basement faults. Lastly, the spatial distribution of the depocenter in Jiyang Depression has gone through the progressive development from east-west trending in the early stage, the coexistence of nearby east-west and north-east trending in the middle stage, and north-east trending finally during Es3 stage. The whole sys-tem is however controlled mainly by NW-SE trending extensional stress field.关键词
济阳坳陷/沙河街组三段/剥蚀地层评估/地层古厚度/沉积中心Key words
Jiyang Depression/the third Member of Shahejie Formation/eroded overburden estimation/stratigraphical pa-leo-thickness/depocenter分类
能源科技引用本文复制引用
倪金龙,郭颖,马骁骐,张凯,王志敏,韩帅..济阳坳陷西南端沙三段剥蚀厚度恢复及其区域构造意义[J].中国石油大学学报（自然科学版）,2015,(4):10-18,9.基金项目
山东省自然科学基金项目( ZR2013DM007) （ ZR2013DM007）
国家“973”计划项目(2012CB723104) （2012CB723104）
国家自然科学基金项目(41102149,41202165,41430211) （41102149,41202165,41430211）
