渤海湾盆地济阳坳陷滑脱构造研究  

The décollement structures in Jiyang Depression,Bohai Bay basin,China

作　　者：李理[1] 钟大赉[2] 杨长春[2] 时秀朋[1] 宫红波[1] 

机构地区：[1]中国石油大学华东地球资源与信息学院,山东东营257061 [2]中国科学院地质与地球物理研究所,北京100029

出　　处：《地球物理学报》2008年第2期521-530,共10页Chinese Journal of Geophysics

基　　金：国家自然科学基金(40772132);中国科学院知识创新工程(KZCX-SW-18-04)资助;国土资源部油气专项(XQ-2004-03-01)资助

摘　　要：通过地震剖面、钻井资料和油田开发资料对渤海湾盆地济阳坳陷地层、构造变形和岩石物性进行研究.结果表明,渤海湾盆地济阳坳陷南缘和东北部存在滑脱构造,滑脱构造主要沿古生界/太古宇不整合面、石炭系/奥陶系假整合面发育,在古生界内部和新生界也有显示.滑脱构造面是一个断层破碎带,发育碎裂岩和褶皱.构造破碎带附近古生界(石炭系)底部和太古宇(奥陶系)顶部出现破碎带,表现为高孔隙度、高渗透率带.视滑动构造强度的不同古生界底部地层可能出现缺失或重复,后者在地震剖面中表现为反射时间明显增大,相应发育滑脱褶皱、堆垛背斜.由于与油气形成的时间相匹配,滑脱构造为潜山油气的储集和运移提供了有效的储集空间和运移通道,是潜山性油气藏形成的重要条件.The study with seismic, drilling, and exploitation data on the strata, structural deformation and the physical properties of the rocks shows the existence of decollement structures in the Jiyang Depression. The decollement structures occurred mainly along the unconformity surface between the Cambrian and Archean, and the disconformity surface between the Carboniferous and Ordovician. The decollement structure also developed within Paleozoic and Cenozoic. The decollement structure surface was a fault zone with cataclastic rocks and folds in the seismic profile. Near the decollement structure surface, at the bottom of the Cambrian and the top of the Archean, developed an interjacent fractured zone which shows high porosity and high permeability. The bottom of the Cambrian might be missed or overlapped, and the latter occurred in the seismic profile as double reflection time corresponding to decollement folds and stacking anticline. Because of the synchronisms of oil-gas formation and decollement structure occurrence, the decollement structure afforded the effective shortage space and channel to accumulation of oil-gas, which were the key elements to the buried hill oil-gas pool.

关 键 词：滑脱构造 油气 济阳坳陷 渤海湾盆地 

分 类 号：P542[天文地球—构造地质学]