河北地质大学学报2025，Vol.48Issue(1)：63-68,6.DOI:10.13937/j.cnki.hbdzdxxb.2025.01.007
鄂尔多斯盆地中部马51+2亚段碳酸盐岩丘滩体沉积相及储层研究
Study on Sedimentary Facies and Reservoirs of Carbonate Mound and Shoal of Ma 51+2 Member in the Center of Ordos Basin
摘要
Abstract
The Majiagou Formation carbonate rocks have rich oil and gas resources.This article divides the sedimentary microfacies of the Ma 51+2 submember through core,thin sections,scanning electron microscopy experiments,analyzes the sedimentary microfacies types and the reservoir.The results show that:1)The Ma 51+2 submember mainly develops fine crystalline dolomite with gypsum mould pores,granular dolomite,crystalline dolomite and microbial rocks.2)The Majiagou Formation is restricted evaporative platform,which can be divided into four subfacies:shoal,microbial mound,platform flat and lagoon.The shoal can be divided into intershoal sea,shoal flank,and shoal body microfacies.Microbial mound subfacies can be divided into mound base,mound body,and mound cap microfacies.3)The main types of pores are gypsum mould pores,intergranular pores,dissolved pores,intergranular pores and fractures.4)The formation of shoal and mound is influenced by changes of sea level and ancient landforms.关键词
碳酸盐岩/马家沟组/丘滩体/主控因素Key words
Carbonatei/Majiayou formation/shoul and mound/main controlling factor分类
地质学引用本文复制引用
徐欣,薛纯琦,黄荣宾..鄂尔多斯盆地中部马51+2亚段碳酸盐岩丘滩体沉积相及储层研究[J].河北地质大学学报,2025,48(1):63-68,6.基金项目
陕西省教育厅科学研究计划项目(23JK0336) （23JK0336）
