【摘要】 针对长深17井气藏来源不明晰、成藏特征认识不够深入等问题,综合地震、测井、地化分析等资料,对该井井区深层的生、储、盖、运、圈(保)等成藏要素及其时空匹配关系进行了系统的研究,并应用轻烃指纹技术展开了气源对比工作。结果表明火石岭组和沙河子组泥岩丰度高、演化阶段有利,是长深17井气藏的主力烃源层;其中火石岭组泥岩大量生烃时期对应泉头组沉积初期(116 Ma)至明水组沉积末期(67 Ma),而探井所处的局部隆起带定型于登娄库组沉积末期,其上覆玄武岩盖层则形成于营城组沉积早期,圈闭和盖层的有效性远早于烃源层的大量生气期,且未被后期的构造活动所破坏,使得沿断裂及砂体复合输导通道运移的天然气能够在营城组火成岩储层中聚集成藏并完好地保存至今。更多还原

【Abstract】 In order to definite gas source and deepen reservoir-forming characteristics of well cs17,based on seismic,logging and geochemical materials,systemic research on source rocks,reservoir,cap,migration,trap(preservation) and their spatial-temporal relationships was launched about the area,moreover,gas-source was correlated by using light hydrocarbon fingerprints technique.The study shows that Shahezi and Huoshiling Formation are abundant in organic matter and in favor evolutionary phase,so they are dominant source rocks of the area,and the peak gas generation of Huoshilingz Formation continued from starting of Quantou age(116 Ma) to the end of Mingshui age(67 Ma);While the uplift where cs17 locates finalized at the end of Denglouku age,moreover,the upper basalt cap formed at the starting of Yingcheng age,so the effectiveness of the trap and cap rock that wasn’t destroyed by faults and fissures are prior to the age of peak gas generation,which caused natural gas to migrate by faults and comprehensive sand-volcanic transforming path and to be preserved in Yingcheng Formation successfully.更多还原