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作 者:王清华[1] 唐子军[2] 赵福元[1] 朱永峰[1] 李辉[1]
机构地区:[1]中国石油塔里木油田分公司,新疆库尔勒841000 [2]中国石油勘探开发研究院,北京100083
出 处:《新疆石油地质》2009年第2期168-170,共3页Xinjiang Petroleum Geology
摘 要:塔里木盆地志留系分布面积大,油气显示丰富,是寻找大油气田的重要领域。随着勘探程度的不断提高,地层岩性油气藏已成为志留系主要的找油方向,目前获工业油气流的层位主要集中在柯坪塔格组上段。有效储集层主要为形成于潮坪、滨岸及三角洲环境的石英含量大于65%的砂岩。海平面升降变化造成的多次海进、海退旋回,有利于多套储盖组合及地层岩性圈闭的形成。凹陷腹地可能存在保存较好的原生古油藏。燕山-喜马拉雅运动期烃类的再次充注,形成塔北不整合遮挡和塔中地层超覆等非构造油气藏,油气勘探前景广阔。The Silurian system in Tarim basin is an important domain for exploration of big oil-gas field for its large area and enriched oilgas shows. With the increase of exploration extent, stratigraphic-lithologic hydrocarbon reservoirs have already become leading aspect for finding oilfield of it. At present, the commercial producing horizons mainly focus on the upper member of Kepingtag formation. The effective reservoir rock is sandstone with quartz content of over 65% formed in tide-flat, shore and delta environment. The study shows that multiple transgression and regression cycles caused by the fluctuating changes of sea level are favorable to formation of multi-set reservoir-cap rock assemblages and stratigraphic-lithologic traps; well preservable primary paleo-oil reservoir may exist in the sag hinterland; recharging of hydrocarbon during Yanshan-Hilalayan movement forms the non-structural reservoirs of unconformity barrier in Tabei area and stratigraphic overlap in Tazhong area, indicating its broad exploration prospect.
关 键 词:塔里木盆地 志留系 成藏地质条件 非构造油气藏 油气勘探前景
分 类 号:TE112.41[石油与天然气工程—油气勘探]
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