塔河油田YT1区块三叠系层序地层与岩相古地理分析  

Triassic sequence stratigraphy and lithofacies paleogeography of the YT1 Block in the Tahe oilfield

作　　者：汪彦[1,2] 鲁新便 彭军[2] 赵冉 

机构地区：[1]中石化西北油田分公司,新疆乌鲁木齐830011 [2]西南石油大学,四川成都610500

出　　处：《特种油气藏》2011年第2期14-17,135,共4页Special Oil & Gas Reservoirs

基　　金：第47批中国博士后科学基金资助"塔河油田YT1区块三叠系油气藏特征及开发研究"(20100471673);四川省教育厅自然科学重点项目"前陆斜坡带-隆起地带高分辨率层序地层学研究"(07ZA139)

摘　　要：塔河油田YT1区块三叠系可划分为6个长期、15个中期和31个短期基准面旋回层序,发育有A型、X型、V型3种不同的层序构型。以短期基准面旋回层序为对比单元,建立相应的高分辨率层序地层格架。根据不同层序单元沉积相发育特征及其岩相古地理分布规律,分析认为该区三叠系属于辫状河三角洲-湖泊沉积体系,随着地层基准面有规律地升降变化,研究区曾发生过6次规模较大的湖进-湖退旋回,其沉积记录亦体现出6次由辫状河三角洲平原-三角洲前缘-前三角洲-滨浅湖变化有序的沉积序列。The Triassic formation in the YT1 Block of the Tahe oilfield can be divided into 6 long-term,15 middle-term and 31 short-term base-level cycles and had developed three sequence patterns including A-type,X-type and V-type.This paper takes short-term base-level cycle sequence as correlation units to build up high resolution sequence stratigraphic framework.The characteristics of sedimentary facies and lithofacies paleogeography distribution indicate that the Triassic formation in this area belongs to braided channel delta-lacustrine facies.With regular fluctuation of base level,six large scale lake transgression-regression cycles had occurred in the study area,the sedimentation record also shows six sequences of braided channel delta plain-delta front-predelta-shore shallow lake facies.

关 键 词：高分辨率层序地层学 岩相古地理 三叠系 YT1区块 塔河油田 

分 类 号：TE121.3[石油与天然气工程—油气勘探]