摘要
为了弄清准噶尔盆地北三台凸起南斜坡带北83井区二叠系梧桐沟组物源与其沉积体系展布特征,对研究区地层厚度、砂岩碎屑组分组成特征、重矿物组合及ZTR指数以及粒度分布特征等方面的资料进行了分析,分析结果显示出母岩区类型以火成岩为主,存在南部、北部两个方向的主要物源。在南部物源的控制下,发育有辫状河三角洲前缘沉积,而在北部物源的影响下,工区北部发育湖底扇沉积。通过对工区梧桐沟组沉积物来源、沉积特征、砂砾岩百分含量等值线、泥岩百分含量等值线、沉积相划分、储层物性统计分析,可知油气分布基本上受控于沉积相,主要为岩性油气藏。
Data on formation thickness, sandstone detrital components, heavy mineral assemblage, ZTR index and particle size distribution show that the provenance of the Permian Wutonggou Formation in north 83 well block at Beisantai, Junggar Basin is igneous rock in south and north. Under the control of the southern provenance, braided river delta front deposit was developed, while under the influence of the northern provenance, sublacustrine fan deposit was developed. The study indicates that distribution of oil and gas, mainly lithologic oil and gas reservoir, is controlled by sedimentary facies.
出处
《四川地质学报》
2016年第1期54-59,共6页
Acta Geologica Sichuan
基金
新疆油田公司<北83井区二叠系梧桐沟组储层特征及沉积相研究>科研项目基金(编号:zdcyc-2013Jz274)
关键词
物源分析
碎屑组分
重矿物
北三台凸起
provenance analysis
Beisantai prominence
detrital components
heavy mineral
