摘要
基于岩心、测井、分析化验等资料,对鄂尔多斯盆地延安气田Z区块马家沟组五段上组合(马五1~4亚段)的沉积相类型及特征进行了深入研究,明确了区内马五1~4亚段沉积相演化规律。结果表明,鄂尔多斯盆地延安气田Z区块马五段上组合发育开阔台地亚相、局限台地和蒸发台地3种亚相,可进一步划分为开阔云坪、开阔灰坪、局限云坪、局限灰坪、含膏云坪、膏盐湖、膏云坪7种微相;总体而言,马五1~4亚段自下而上经历了逐渐海退的沉积过程,仅在马五3亚段发育一次小幅度海侵。
Based on core,logging,and testing data,an in-depth study was conducted on the sedimentary facies types and characteristics of the upper assemblage of the fifth member(Ma51-Ma54 sub-members)of the Majiagou Formation in Block Z of the Yan'an Gas Field in the Ordos Basin,and the evolution law of the sedimentary facies of the Ma51-Ma54 sub-members in this area was clarified.The results show that in the upper assemblage of the fifth member of the Majiagou Formation in Block Z of the Yan'an Gas Field in the Ordos Basin,three sub-facies types,namely the open platform sub-facies,restricted platform sub-facies,and evaporative platform sub-facies,are developed,which can be further divided into seven micro-facies types,including open dolomite flat,open limestone flat,restricted dolomite flat,restricted limestone flat,gypsum-bearing dolomite flat,gypsum-salt lake,and gypsum dolomite flat.Generally speaking,from the Ma51-Ma54 sub-members,a gradually regressive sedimentary process occurred from the bottom to the top,and only a small-scale transgression occurred in the Ma53 sub-member.
作者
帅军
郭田超
陈雨露
张锐
Shuai Jun;Guo Tianchao;Chen Yulu;Zhang Rui(Gas Field Company of Shaanxi Yanchang Petroleum(Group)Co.,Ltd.,Shaanxi,716000;School of Chemistry and Chemical Engineering,Yulin University,Shaanxi,719000)
出处
《当代化工研究》
2025年第10期54-56,共3页
Modern Chemical Research
关键词
鄂尔多斯盆地
马家沟组
沉积相
白云岩
Ordos Basin
Majiagou formation
sedimentary facies
dolomit
