基于青海湖现代沉积对港中油田沙一段滩坝沉积微相的研究  

Study on sedimentary microfacies of beach-bar sand of the first member of Shajiehe Formation in Gangzhong Oilfield based on the modern Qinghai Lake deposition

作　　者：吴小斌[1,2] 侯加根[2] 王大兴[3] 李树庆[3] 李泉凤[3] 赵亮[3] 秦培莉[3] 

机构地区：[1]延安大学能源与环境工程学院,陕西延安716000 [2]中国石油大学(北京)地球科学学院,北京102249 [3]大港油田采油一厂,天津300280

出　　处：《西安石油大学学报（自然科学版）》2013年第5期31-38,4-5,共8页Journal of Xi’an Shiyou University（Natural Science Edition）

基　　金：国家科技重大专项(编号:2011ZX05010-001);延安大学专项科研基金项目(编号:YDK2012-1)

摘　　要：为了对沉积微相进行精细研究,从国内外文献调研入手,基于现代湖泊青海湖滩坝砂的研究资料和黄骅坳陷港中地区实际储层资料,选取具有代表性的剖面和样品进行分析,结合粒度分析、古生物鉴定等测试资料,阐明了滩坝砂体沉积微相类型的划分依据,将湖泊相滨浅湖亚相进一步划分为坝主体、坝缘、滩砂、浅湖泥、湖湾泥共5种微相类型.结合港中地区沙一段沉积微相分析,界定了单一微相砂体分布范围,探讨了港中地区沙一段滩坝砂的时空演化规律,认为坝主体以多期坝砂的垂向和侧向加积作用为主,自滨Ⅰ6至滨Ⅰ1坝中心逐渐向西北偏移,坝间由薄层滩砂条带或面积较小的湖湾所分割.Based on the survey data from the modern Qinghai Lake beach-bar sand and the actual reservoir data of Gangzhong area in Huanghua depression,through the particle size analysis and paleontology identification of the representative profiles and samples,the division standards of the micro-facies types of the beach-bar sand are expounded,and the lakeshore-shallow lake subfacies in the studied area is subdivided into 5 types of microfacies,that is,main dam,dam edge,beach sand,shallow lake mud and lake bay. The distribution of single microfacie sandbodies and the space-time evolution rule of the beach-bar sand are discussed,and it is held that the main dam sand body is formed mainly by vertical and lateral aggradation of multi-phase bam sand,and the center of from Ⅰ6 to Ⅰ1dam shifts to the northwest. The beach-bar sand is divided into different dams by thin sand beach trips and small bays.

关 键 词：青海湖现代沉积 滩坝砂 沉积微相 港中油田 沙一段 

分 类 号：TE112.23[石油与天然气工程—油气勘探]