地质学报（英文版）2004，Vol.78Issue(3)：676-683,8.
Ordovician Basement Hydrocarbon Reservoirs in the Tarim Basin, China
Ordovician Basement Hydrocarbon Reservoirs in the Tarim Basin, China
摘要
Abstract
Ordovician marine carbonate basement traps are widely developed in the paleo-highs and paleo-slopes in the Tarim Basin. Reservoirs are mainly altered pore-cavity-fissure reservoirs. Oil sources are marine carbonate rocks of the Lower Paleozoic. Thus, the paleo-highs and paleo-slopes have good reservoiring conditions and they are the main areas to explore giant and large-scale oil reservoirs. The main factors for their reservoiring are: (1) Effective combination of fenestral pore-cavity-fracture reservoirs, resulting from multi-stage, multi-cyclic karstification (paleo-hypergene and deep buried) and fracturing, with effective overlying seals, especially mudstone and gypsum mudstone in the Carboniferous Bachu Formation, is essential to hydrocarbon reservoiring and high and stable production; (2) Long-term inherited large rises and multi-stage fracture systems confine the development range of karst reservoirs and control hydrocarbon migration, accumulation and reservoiring; (3) Long-term multi-source hydrocarbon supply, early reservoiring alteration and late charging adjustment are important reservoiring mechanisms and determine the resource structure and oil and gas properties. Favorable areas for exploration of Ordovician carbonate basement hydrocarbon reservoirs in the Tarim Basin are the Akekule rise, Katahe uplift, Hetianhe paleo-high and Yakela faulted rise.关键词
Tarim Basin/Ordovician/basement hydrocarbon reservoirKey words
Tarim Basin/Ordovician/basement hydrocarbon reservoir引用本文复制引用
YAN Xiangbin,LI Tiejun,ZHANG Tao..Ordovician Basement Hydrocarbon Reservoirs in the Tarim Basin, China[J].地质学报（英文版）,2004,78(3):676-683,8.基金项目
The research is financially supported by the National Natural Sciences Foundation of China (grant 40102020). （grant 40102020）
