Characteristics and Formation Mechanism of Fissures in Ordovician Strata of No.4 Block, Tahe Oilfield
详细信息
- 责任者：Gao Yufei (CNOOC Research Center ; Beijing 100027 ; China) ; Zhong Jianhua
- 刊名：Geology in China
- 出版年：2009
- 卷期：36(6)
- 关键词：裂隙型储集层 ; fractured reservoirs ; 裂隙 ; cracks ; 塔里木盆地 ; Tarim Basin
- 页码：p.1257-1267
- 图表：10 illus., 2 tables, 10 refs.
- 分类号：1003
- issnNo：ISSN1000-3657
- isbnNo：CN11-1167/P
摘要
Based on core and thin section observations for more than 20 wells in combination with FMI and analysis of a variety of test data, this paper studied a certain characteristic parameters of reservoir fissures, such as the ranges, strikes, lengths and bulk densities of the fissures, and analyzed their filling situation. On such a basis, the controlling factors were analyzed, which included structure, lithology, former faulting, rock structure and the stages for the formation of the fissures. The fissures are assigned to four stages: I-Pre-Caledonian period, II-Caledonian period, III-Early Hercynian period, IV-Late Hercynian-Himalayan period. The genetic mechanisms of the fissures are also discussed.