摘要
以高分辨率层序地层学和沉积学理论为指导，综合地质、测井和地震等资料，将莫里青地区古近系双一段划分为一个中期旋回，其上升半旋回进一步划分为1个短期旋回和2个上升半旋回，中期旋回的下降和上升半旋回分别对应I砂组和Ⅱ砂组，上升半旋回内部的短期旋回则对应Ⅱ砂组的3个小层。在等时地层格架的基础上，在双一段内识别出扇三角洲、湖底扇和湖泊3种沉积相类型，从双一段Ⅱ砂组到I砂组沉积时期，湖底扇和扇三角洲沉积体发育呈不断萎缩的趋势。扇三角洲前缘相的水下分流河道微相和湖底扇相的辫状水道微相是油气聚集的有利相带。
Guided by the theories of high-resolution sequence stratigraphy and sedimentology, Palaeogene Shuang No. 1 Member in Moliqing area is divided into a middle cycle ; the rising hemicycles of the member are further clas- sified into a short cycle and two rising hemicycles with the help of the geologic, logging and seismic data. The de- scending and rising hemicycles of the middle cycle are corresponding to No. Ⅰ and No. Ⅱ sand groups; and the short cycle inside the rising cycle is corresponding to three sub-layers of No. Ⅱ sand group. Based on the isochro- nous stratigraphy framework, three types of sedimentary facies as fan delta, sublacustrine fan and lake facies are discriminated in Shuang NO. 1 Member; The developments of the sublacustrine fan and fan delta deposits possess the trend of continuous shrink from the sedimentary period of No. Ⅱ and No. Ⅰ sand group in Shuang No. 1 Mem- ber. The underwater distributary channel micro-facies of fan delta and braided channel micro-facies of sublacustrine fan are favorable facies belts for oil and gas accumulation.
出处
《大庆石油地质与开发》
CAS
CSCD
北大核心
2012年第3期30-35,共6页
Petroleum Geology & Oilfield Development in Daqing
基金
国家重大专项（2008ZX05030-05-001）和国家重点基础研究规划“973”项目（2006CB202300）资助.
关键词
莫里青地区
双一段
沉积相类型
沉积演化
油气聚集
Moliqing area
Shuang No. 1 Member
type of sedimentary facies
sedimentary evolution
oil and gas accumulation
作者简介
杨玲，女，1985生，在读博士，从事沉积岩石学与储层地质学方面的研究。E-mail：yangling8472657@yahoo．com．cn
