摘要
依据柴达木盆地北部冷科 1井等钻井及大煤沟剖面等露头的生物地层研究成果 ,重新建立了柴达木盆地北缘地层系统 ,并标定了地震剖面 ,追踪出了中、下侏罗统的分布范围及厚度。研究结果表明 ,早侏罗世时柴达木盆地北缘为断陷沉积 ,各次凹地层沉积最厚 ,且利于烃源岩发育 ;中侏罗世时柴达木盆地北缘为早期断陷、后期坳陷 ,烃源岩厚度及分布范围较小。这一成果 ,为确定柴达木盆地北缘主力烃源岩展布 。
According to studies of the biostratigraphic division in Lengke 1 borehole and outcrops, this paper sets up a new stratigraphic system, calibrates seismic sections and traces area and thickness of Jurassic distribution on the north margin of the Chaidamu Basin. It is indicated that a rift sequence is developed along the margin during Early Jurassic time, with several depressions having thickest sediments and favouring formation of hydrocarbon source rocks. During Middle Jurassic time, the north margin of the Basin is characterized by early rifting and late depressing, with source rocks relatively being small in area and thickness. This results has laid a foundation for searching main source rocks, researching into petroleum geology and selecting future exploration targets on the north margin.
出处
《地层学杂志》
CSCD
北大核心
2001年第2期154-159,共6页
Journal of Stratigraphy
基金
中国石油天然气集团公司青海石油管理局<柴达木盆地北缘侏罗系含油气系统特征与评价>下设地层专题
