石油实验地质2017，Vol.39Issue(3)：377-382,6.DOI:10.11781/sysydz201703377
塔河油田塔深3井区奥陶系深层油气成藏的地球化学证据
Geochemical evidence for hydrocarbon accumulation in deep Ordovician in TS3 well block, Tahe oil field
摘要
Abstract
Well TS3 is the first discovery well in the deep Ordovician of Tahe oil field.Commercial oils were tested in the Yingshan Formation of the Middle-Lower Ordovician.The physical characteristics of oils from TS3 well block are similar to those from nearby near-surface reservoirs, which both are super heavy oils with high freezing point, high sulfur content, high wax content and high viscosity.The n-alkane series are complete with a variable hump in the chromatographic baselines and widespread 25-norhopane series.The carbon isotopes of saturate hydrocarbons and asphaltenes are partly reversed.These features indicate that the reservoirs in TS3 well block underwent at least 2 periods of hydrocarbon filling and forming.In addition, oil inclusions with yellow, yellow-green and blue fluorescence and gas inclusions were tested in calcites of the Yingshan Formation reservoir.The homogenization temperature of inclusions suggests three periods of hydrocarbon filling: Late Caledonian-Early Hercynian, Late Hercynian and Late Himalayan.Combined with physical properties (super heavy oils) and maturity (mature oils) of the present oils, the first period of oil and gas filling was dominant in the TS3 well block.关键词
包裹体/成藏期次/地球化学/奥陶系深层/塔河油田Key words
inclusion/accumulation period/geochemistry/deep Ordovician/Tahe oil field分类
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刘永立,罗明霞,夏永涛,邵小明..塔河油田塔深3井区奥陶系深层油气成藏的地球化学证据[J].石油实验地质,2017,39(3):377-382,6.基金项目
国家重点基础研究发展计划(973计划)项目"中国下古生界大型油气田保存条件与分布预测"(2012CB214806)和中国石化科技部科技攻关项目"塔河油田深层储层成因、成藏规律与目标优选"(P15030)联合资助. （973计划）
