鄂尔多斯盆地镇泾油田致密砂岩长8储层特征及沉积相研究  

THE CHANG8 RESERVOIR FEATURE AND SEDIMENTARY FACIES OF TIGHT SAND RESERVOIR IN ZHENJING OIL FIELD

作　　者：徐勇 李艳霞[2] 吕艾 XU Yong LI Yan-xia LV Ai(Shannxi Geological Survey, Xi＇an 710065, China Xi＇an Shiyou University, Xi＇an 710021, China Changqing Oilfield Company Production Plant6, Xi＇An 751500, China)

机构地区：[1]陕西省地质调查院,陕西西安710065 [2]西安石油大学,陕西西安710021 [3]中国石油长庆油田第六采油厂,陕西西安751500

出　　处：《甘肃地质》2016年第4期56-60,73,共6页Gansu Geology

基　　金：陕西省自然科学基金项目资助;项目编号2013JM5006

摘　　要：利用扫描电镜、铸体薄片等多种方法,对鄂尔多斯盆地镇泾油田长8油层组低孔低渗的致密砂岩储层的储层特征和沉积相进行综合分析研究,发现该地区砂岩类型主要有细粒岩屑长石砂岩和长石岩屑砂岩,孔隙度和渗透率分别为3.9%%～11%和（0.04～0.55）×10-3μm2。研究区主要成岩作用包括压实作用、压溶作用、胶结作用、溶蚀作用、交代作用。通过对镇泾区块沉积储层形成的沉积相的研究,查明该区广泛发育三角洲相,进一步可划分为水下分流河道、水下天然堤、水下决口扇、水下分流间湾、河口坝等5种微相。上述研究为镇径油田长8段储层的研究和预测提供了理论依据。In order to study of low permeability tight sandstone reservoir feature and sedimentary facies of the Chang8 in Zhenjing Oilfield, by use of the tests of scanning electron microscope, casting section and so on.Sandstone reservoirs can be classified as compositionally feldspathie litharenite sandstone, lithicarkose sandstone,Porosity and permeability of reservoir are about 3.9%～11% and（0.04～0.55）×10-3μm2. We can concluded from the observation of thin section that the diagenesis are mainly compaction and pressolution, cementation,metasomatic alteration and dissolution in the research area. Sedimentary facies are mainly composed of underwater distrbutary underwater levee, subaqueous crevasse splay, subaquatic tributary bay,and mouth bar. The research for chang 8 of the reservoir prediction and research, provide a theoretical basis.

关 键 词：致密砂岩 储层特征 沉积相 鄂尔多斯盆地 长8 

分 类 号：P618.13[天文地球—矿床学]