冀中坳陷古近纪地层厚度变化及断层活动特征  

Paleogene formation thickness changes and fault activities of Jizhong Depression

作　　者：李梦萍 戴俊生[1] 邹娟[2] 

机构地区：[1]中国石油大学(华东)地球科学与技术学院,山东青岛266580 [2]中国石油冀东油田勘探开发研究院,河北唐山063004

出　　处：《断块油气田》2016年第2期137-141,共5页Fault-Block Oil & Gas Field

基　　金：国家科技重大专项"大型油气田及煤层气开发"(2011ZX05042);中国石油华北油田分公司科技项目"冀中富油凹陷二次勘探潜力与方向研究"(HBYT-WTY-2011-JS-303)

摘　　要：以地震、地质资料为基础,以冀中坳陷的廊固、霸县及饶阳凹陷为研究工区,利用地层厚度变化率导数法和断层落差面密度法,分别研究工区古近纪地层厚度变化特征及断层活动性,进而反映构造活动强弱。结果表明:冀中坳陷古近纪断层活动性整体较强,地层厚度变化快。其中:孔店—沙四期地层厚度变化较慢,断层活动性较弱;沙三—沙二期地层厚度变化加快,断层活动性增强;沙一—东营期地层厚度变化明显减慢,断层活动整体减弱,局部断层持续活动。冀中坳陷古近纪构造活动强度经历了较弱—强—弱的变化过程。Based on the seismic data and geological information,the main research areas are Langgu Sag,Baxian Sag and Raoyang Sag.The derivative of stratigraphic thickness changing rate and the throw-surface density are used for the formation thickness changes and faults activities,which reflect the tectonic activities.Results show that Paleogene fault activities of Jizhong Depression are intensive as a whole with the rapid formation thickness changes.The thickness changes of Ek ￣Es4formation were slow and fault activities were weak.While in the period of Shahejie 3￣2,the formation thickness changed greatly with increasingly intensive tectonic activities.Then as the thickness changes of Es1￣Ed formation decreased,the tectonic activities became weak,only partial areas continued actively.The Jizhong Depression in Paleogene underwent a weak-strong-weak tectonic evolution.

关 键 词：地层厚度变化率导数 落差面密度 断层活动性 冀中坳陷 

分 类 号：TE122.321[石油与天然气工程—油气勘探]