摘要
二连盆地白音查干凹陷是一个北断南超型的箕状断陷盆地。通过岩心、录井、测井的综合研究 ,根据层序地层学原理 ,将凹陷的主要研究目的层———下白垩统巴彦花群划分出 2个超层序和 6个三级层序 ;识别出冲积扇、扇三角洲、辫状河三角洲、浊积扇、滨浅湖、半深湖、深湖等 7种沉积相类型 ,其中冲积扇、扇三角洲发育在凹陷的北部陡坡带 ,辫状河三角洲和浊积扇发育在凹陷南部缓坡 ;发现凹陷经历过 3次大的湖泛 ,在层序演化上具有早期形成、继承性发育、晚期鼎盛的特点。图 3参
Located in Er’lian Basin, Baiyinchagan is a depression with faults in north and overlap in south. An overall study has been carried out. Based on drill core, logging profiles, logs, and seismic data, as well as the classic pattern of sequence stratigraphic framework by the EXXON Oil Company and the base level cycle pattern of high resolution sequence stratigraphy by T. Cross, two super sequences and six three order sequences have been identified in Bayanhua group, Lower Cretaceous,which are the fundamental target beds of this region. Six types of sedimentary facies have been recognized. Among these sedimentary facies, alluvial fans and fan delta are found on the steep slope in north of the depression, while braid river delta and turbidity fans are found on the ramp of south. Three times of lake transgression can be distinguished. The sequence evolution is that they formed in early time, developed continuously ,reached to the biggest scale in late time.
出处
《石油勘探与开发》
SCIE
EI
CAS
CSCD
北大核心
2003年第4期32-33,121,共3页
Petroleum Exploration and Development
基金
中国石化股份有限公司"九五"科技攻关项目 (P0 0 0 15 )
关键词
层序地层
沉积相
白音查干凹陷
二连盆地
sequence stratigraphy
sedimentary facies
Baiyinchagan Sag
Er'lian Basin
