• 责任者：Si Shanghua (School of Earth Sciences and Engineering ; Xi’an Petroleum University ; Xi’an 710065 ; China) ; Chen Honghan
• 刊名：Earth Science
• 出版年：2013
• 卷期：38(6)
• 关键词：含油气系统 ; petroliferous system ; 成藏期 ; pool-forming period ; 塔里木盆地 ; Tarim Basin
• 页码：p.1271-1280
• 图表：9 illus., 1 table, 20 refs.
• 分类号：1003
• issnNo：ISSN1000-2383
• isbnNo：CN42-1233/P

     Three types of basic carrier systems are identified for of Ordovieian reservoir in Yubei area, Southwest Tarim Basin, analyzing the hydrocarbon migration and accumulation process which are known as fault type, unconformity type and carrier layer type, where the carrier ability is strong in the Middle Part of Yubei area but weak in the Eastern Part. The organic and inorganic fluid inclusion analyses of 25 Ordovician samples from 3 wells in Yubei area indicate that there were two phases of hydrocarbon charging in Ordovician. In the period from 262 Ma to 252 Ma before present hansi-font-family: ’times new roman’">（in Late Hercynianhansi-font-family: ’times new roman’">）, low-mature oil with yellow fluorescence was charged. In the second period from 12. 5 Ma to 0 Ma before present hansi-font-family: ’times new roman’">（in Late Himalayanhansi-font-family: ’times new roman’">）, high- maturity oil with blue-white fluorescence was charged. Two groups of hydrocarbon source rocks, namely, the Lower Cambrian source rock and the Upper Cambrian-Lower Ordovician source rock, are developed in Yubei area. The cover is the mudstone and marl of Lower Carboniferous Bachu Formation Strata. The reservoir is the karst weathering of Lower-Middle Ordovician Strata. The cover and reservoir are composed of discontinuous interlayer combinations.