维普中文期刊产品整合服务

The deep-lake deposit in the Upper Triassic Yanchang Formation in Ordos Basin, China and its significance for oil-gas accumulation

查看全文 作　　者：CHEN QuanHong LI WenHou GAO YongXiang GUO YanQin FENG JuanPing ZHANG DaoFeng CAO HongXia LIANG [1]JiWei 高影响力作者 机构地区：[1]State Key Laboratory of Continental Dynamics, Department of Geology, Northwest University, Xi'an 710069, China State Key Laboratory of Continental Dynamics, Department of Geology, Northwest University, Xi'an 710069, China State Key Laboratory of Continental Dynamics, Department of Geology, Northwest University, Xi'an 710069, China Institute of Oil and Gas Resources, Xi'an Shiyou University, Xi'an 710065, China State Key Laboratory of Continental Dynamics, Department of Geology, Northwest University, Xi'an 710069, China Changqing Oil Field Branch Company of China Petroleum, Xi'an 710021, China State Key Laboratory of Continental Dynamics, Department of Geology, Northwest University, Xi'an 710069, China State Key Laboratory of Continental Dynamics, Department of Geology, Northwest University, Xi'an 710069, China高影响力机构 出　　处：《Science China Earth Sciences》索引2007年第50卷第z2期,共12页高影响力期刊 摘　　要：The deep-lake facies of the Yanchang Formation represents a large outflowing lake basin in the Ordos area. Its deposition can be divided into four stages: lake genetic and expanding stage, peak stage, inversion stage and dying stage. All the stages are obviously consistent with the evolution of depositional environment and the paleoclimate in the region. The study indicates that the lake basin has evolution fluctuations from highstand to lowstand for four times in its evolution history, and the deposition center of the lake has not obviously moved, staying along the Huachi-Yijun belt. The deep lake sedimentary system mainly consists of deep water deltas and turbidite fans during the entire evolution course of the lake basin in the Late Triassic. The former mainly developed on the slope of steep shore of the delta in the early period of the deep-water expansion and gradually experienced a big shift from deep-water deltas to shallow-water platform delta. And the latter appeared almost in all the above stages and had two types of turbidite fans, slope-moving turbidite fans and slump turbidite fans. The slope-moving turbidite fans have relatively complete facies belts overlapping one another vertically and consist of the slope channel of inter fans, the turbidite channel, inter turbidite channel and turbidite channel front of middle fans and outer fans (or lakebottom plain). However, the slide-moving turbidity fans are formed in the deep lake with their microfacies difficult to be distinguished, and only the center microfacies and edge microfacies can be determined. The two types of the turbidity fans are similarly distributing in the near-root-slope and far-root-slope regions. The deep-lake deposition governs the distribution of the hydrocarbon and reservoir, while the slope-moving turbidite fans are excellent reservoirs for oil-gas exploration due to their great thickness, widespread distribution and accumulation properties. 关 键 词：deep lake, DEEP-WATER basin delta, slope-moving TURBIDITE fans, SLUMP TURBIDITE FANS
相关文献

参考文献(39)

引证文献(12)

耦合文献(2066)

网站首页 | 关于我们 | 联系我们 | 产品服务 | 客服中心 | 广告服务 | 版权声明 | 网站联盟 | 友情链接 | 售卡网点

版权所有© 渝B2-20050021-1　渝公网安备 50019002500403号　违法和不良信息举报中心

互联网出版许可证 新出网证(渝)字10号 全国400电话 - 免长途话费