【摘要】 实现统一的地层划分和对比是做好勘探部署的关键。经典层序地层学和高分辨率层序地层学的发展以及勘探手段的不断提高和对资料的重新认识,使原来存在分歧的地层有可能实现统一的标准和地层划分。随着新钻探井资料的增多,针对松辽盆地泉头组四段的层序划分一直存在的争议,对现有录井资料、测井资料、地震资料的重新分析对比,总结出该段地层特征和地层对比划分的基本方法,解决了泉四段底部界限不清晰,无明显标志,划分标准不统一的问题。综合泉四段岩电特征,利用高分辨率测井资料和岩心资料进行四级层序界面的识别,确定其界面的识别标志主要有冲刷面、测井曲线泥岩基值转折点、沉积旋回的转换面、砂泥岩的突变接触面4种。更多还原

【Abstract】 Achieving a unified stratigraphic classification and correlation is the key to have a good exploration plan.The development of classic sequence stratigraphy and high-resolution sequence stratigraphy,continuous improvement of exploration means and new understanding of the data,made it possible to achieve uniform standard and stratigraphic division for the formations which existed disagreement.There has been a controversy in the sequence classification in Quan4 Member,Quantou Formation,Songliao Basin,with new drilling data increasing,the re-analysis and comparison of the existing mud logging data,wireline logging data and seismic data,the author summed up the stratigraphic features and the basic methods for stratigraphic classification and correlation,solved the problems of no clear bottom boundary,no obvious signs of and non-uniform criteria for the classification to Quan4Member.Combing with lithology and electricity features of Quan4 Member,using high-resolution wireline logging data and core data to identify fourth-order sequence interface,the author determined four main interface indications,they are scouring surface,base value turning points of mudstone from wireline logging curve,the conversion surface of sedimentary cycles and the contact surface of sand shale mutation.更多还原