摘要
四川盆地震旦系灯影组丘滩沉积体广泛发育,具有很好的储集价值。基于露头勘查与岩心观测获取的资料,通过薄片鉴定、孔隙度、渗透率测试等方法分析丘滩储集体的储集性能。结果表明,由于震旦纪末期绵阳-长宁裂陷槽的发育影响了灯二段与灯四段碳酸盐岩台地相带展布,导致形成不同的古地理环境,目前可识别出高能环境、过渡环境、低能环境下发育的丘滩岩石类型,即以胡家坝剖面灯四段为代表的并进型丘滩多沉积高能环境岩石类型,以杨坝剖面灯二段为代表的追补型丘滩多沉积过渡环境岩石类型,以福成剖面灯四段为代表的饥饿型丘滩多沉积低能环境岩石类型。通过分析3种丘滩类型的储集空间与经历的准同生期成岩作用,并比较它们的物性特征,认为并进型丘滩体为最好的储集层。该研究成果有助于寻找优质储集层的发育位置,进而为四川盆地灯影组油气勘探提供参考。
The mound-bank deposits of the Dengying Formation of the Sinian System are well developed in Sichuan Basin,with good reservoir value. Based on outcrop and core observation,thin section observation,porosity and permeability of samples test,we analyzed the reservoir quality of different moundbank complexes. During the terminal of Sinian Period,development of the Mianyang-Changning rift affected distribution of sedimentary facies of the 2 nd and the 4 th Members of Dengying Formation,forming different palaeogeographic units. The high-energy environment,transition environment and low-energy environment of the mound-bank complex rock types are identified,and their reservoir quality is different. The keep-up platform margin mound-bank complex,which is represented by Hujiaba section in the 4 th Member of the Dengying Formation mainly deposited high-energy zone rock types. The catch-up platform margin mound-bank complex,which is represented by Yangba section in the 2 nd Member of the Dengying Formation,mainly deposited transform zone rock types. The give-up platform interior mound-bank complex,which is represented by Fucheng section in the 4 th Member of the Dengying Formation mainly deposited low-energy zone rock types. By comparing reservoir characteristics of three types of mound-bank complex,it is found that the keep-up platform margin mound-bank complex is the ‘Sweet spots’ of the Dengying Formation in the Sichuan Basin. The above studies are conducive to find the ‘Sweet spots’ of the Sinian Dengying Formation in the Sichuan Basin.
作者
徐哲航
兰才俊
郝芳
陈浩如
杨伟强
马肖琳
邹华耀
Xu Zhe-Hang;Lan Cai-Jun;Hao Fang;Chen Hao-Ru;Yang Wei-Qiang;Ma Xiao-Lin;Zou Hua-Yao(State Key Laboratory of Petroleum Resources and Prospecting,China University of Petroleum(Beijing),Beijing 102249,China;College of Geosciences,China University of Petroleum(Beijing),Beijing 102249,China;School of Geosciences,China University of Petroleum(East China),Qingdao 266580,China;Faculty of Earth Resources,China University of Geosciences(Wuhan),Wuhan 430074,China;CNOOC Nanhai East Petroleum Bureau,Shenzhen 518067,China)
出处
《古地理学报》
CAS
CSCD
北大核心
2020年第2期235-250,共16页
Journal of Palaeogeography：Chinese Edition
基金
中国科学院战略性先导科技专项(A类)(编号:XDA14010306)
国家自然科学基金项目(编号:U1663210)
国家科技重大专项(编号:2017ZX05005-003-003)共同资助。
关键词
古地理环境
丘滩复合体
微生物岩
碳酸盐岩储集层
震旦系
灯影组
四川盆地
palaeogeographic environment
mound-bank complex
microbialite
carbonate reservoir
Sinian
Dengying Formation
Sichuan Basin
