白驹凹陷泰一段沉积微相研究

Reseach on the Sedimentary Microfacies of Member 1 of Taizhou Formation in Baiju Sag

白驹凹陷近年来在勘探领域取得突破,多口井在泰一段获工业油流或油气显示活跃,展现了该地区的勘探开发潜力.在岩心的观察描述、粒度分析、录井、测井等资料的综合分析基础之上,结合研究区的沉积环境和构造背景,对研究区进行沉积相标志识别以及沉积微相分布规律研究.研究结果表明:泰一段以三角洲前缘亚相及前三角洲沉积为主.三角洲前缘亚相进一步划分出水下分流河道、分流间湾、河口坝、前缘席状砂、远砂坝等5种微相.

Baiju sag has made a breakthrough in exploration field in recent years.Many wells are active in the industrial oil flow or oil-gas display in member 1 of Taizhou formation,which shows the exploration and development potential of the area.Based on the comprehensive analysis of core observation description,grain size analysis,logging and other data,combined with the sedimentary environment and structural background of the study area,the sedimentary facies marker recognition and sedimentary microfacies distribution law of the study area are studied.The results show that member 1 of Taizhou formation is dominated by delta front subfacies and pre delta deposits.The delta front subfacies can be further divided into five microfacie such as underwater distributary channel,distributary Bay,mouth bar,front sheet sand and distal bar.