塔里木盆地台盆区油气成藏条件与勘探方向

doi:10.11743/ogg20050506

摘要/Abstract

摘要：

塔里木盆地台盆区含油气层系众多,目前探明储量主要分布于奥陶系、泥盆系和三叠系。台盆区经历了多期构造运动,形成3个大型古隆起。通过塔河、哈德逊及塔中11井油气田(藏)的剖析,烃源岩的分布、生烃史与古隆起、古斜坡之间的匹配关系是控制油气藏形成与分布的主要因素。台盆区油气藏具有多期成藏和调整的特点,海西晚期是现存古生界油藏的主要形成时期,喜山期是早期油藏发生调整、形成次生油气藏的主要时期。区域盖层之下、不整合面上下、断裂带周围油气较为富集。在分析塔河、哈得逊、塔中11油气藏成藏特征及条件的基础上,指出了下古生界碳酸盐岩潜山、泥盆系、石炭系和志留系及三叠系碎屑岩油气藏是下步勘探的主攻方向。

关键词: 油气藏, 烃源岩, 成藏期, 克拉通, 塔里木盆地

Abstract:

There are many oil-and gas-bearing series in Tarim basin,and the currently discovered oil and gas reserves are mainly distributed in Ordovician,Carboniferous and Triassic reservoirs.The basin has experienced multiphase tectonic movements,leading to the formation of 3 large paleohighs.Analyses of Tahe oilfield, Hadexun oilfield and Tazhong 11 well oil reservoir show that the matching of distribution of source rocks and hydrocarbon generation history with the paleohighs and paleo-slopes are the main factors controlling formation and distribution of oil and gas reservoirs.The oil and gas reservoirs in the basin are characterized by multiphase reservoiring and adjustment.The existing Paleozoic oil reservoirs have mainly been formed in Late Hercynian,and adjustment of the early oil reservoirs and formation of the secondary oil and gas reservoirs have mainly occurred in Himalayan.Oil and gas are enriched under regional cap rocks,above and below unconformity and in the periphery of fracture belt.Based on analyses of the reservoiring characteristics and conditions of Tahe oilfield,Hadexun oilfield and Tazhong 11 well oil reservoir,it is pointed out that future exploration would be targeted at the Paleozoic carbonate buried hill,and Carboniferous,Silurian and Triassic clastic rock oil and gas reservoirs.

Key words: oil and gas reservoir, source rock, reservoiring stage, craton, Tarim basin

中图分类号:

TE122.1

蔡希源. 塔里木盆地台盆区油气成藏条件与勘探方向[J]. 石油与天然气地质, 2005, 26(5): 590-597. doi: 10.11743/ogg20050506 Cai Xiyuan. Reservoiring conditions and exploration targets in Tarim basin[J]. Oil & Gas Geology, 2005, 26(5): 590-597. doi: 10.11743/ogg20050506

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