摘要
依据钻井、测井资料,充分应用沉积学理论,对尕斯库勒油田下干柴沟组上段沉积相进行分析,在研究区共识别出三角洲亚相、滨湖亚相、浅湖亚相及半深湖亚相等4种沉积相类型。通过单井相和剖面相分析,认为研究区下干柴沟组上段沉积期湖水面波动频繁,小规模的湖侵—湖退过程形成了5个4级层序,其决定了研究区沉积微相的垂向演化和叠置格局。通过对研究区沉积相进行研究,划分出沉积微相,明确了沉积微相的空间展布规律,对指导研究层段下一步的研究和勘探开发具有重要意义。
Based on the abundant drilling and logging data,full application of deposition theory,analyses of the sedimentary facies of the lower Ganchaigou Formation in the Gasikule oilfield,4 types of sedimentary facies have been identified in the study area,including delta,coastal lake,shallow lake and semi-deep lake.Frequent seiches of lake in the upper member of the lower Ganchaigou Formation in the region are studied through single well facies and profile facies analyses.It formed 5 fourth class sequences during the process of small-scale lake transgression to lake regression,which determined the vertical evolution and superimposed texture of sedimentary microfacies in the study area.Through the study of sedimentary facies,sedimentary microfacies have been divided,which provide significant guidance to the future research and the exploration and development of the studied formation.
出处
《天然气地球科学》
EI
CAS
CSCD
北大核心
2012年第5期884-890,959,共8页
Natural Gas Geoscience
关键词
柴达木盆地
尕斯库勒油田
干柴沟组
沉积相
演化规律
Qaidam basin
Gasilkule oilfield
Ganchaigou Formation
Sedimentary facies
Evolution pattern
