摘要
在宿主矿物、成岩序列及流体包裹体特征分析的基础上,测定了与烃类流体包裹体共生的盐水溶液包裹体的均一温度、盐度等参数和荧光特征,结合古地温梯度和沉积埋藏史确定了油气充注的深度和对应的地质时代。包裹体分析结果表明,吉林油田扶新隆起和长岭凹陷是在青一段生烃高峰后和扶余油层主成藏期后才发生明显的“隆—凹”分异,即油气充注和成藏发生于扶新隆起大规模隆升之前。扶新隆起扶余油层存在两期成藏,分别发生于嫩江期末(成熟阶段早期充注的石油)和明水期末(成油高峰期充注的石油)。包裹体分析结果揭示了油藏具有上生下储、本地供源、垂向运移的特征,澄清了以往油源主要由长岭凹陷侧向运移而来的地质认识。进一步指出,围绕泉四段—青一段油源断裂发育区,“烃源岩/超压+断层+砂体”控制的“甜点”带是今后增储上产的重点勘探地区。
Based on matrix mineral, diagenetic sequence and fluid inclusions, are tested homotemprature, salinity and fluorescence of inclusions which coexist with hydrocarbon inclusions. The depth and geological age of oil inpouring are ascertained by combining with paleotemperature grad and sedimentary burial history. Inclusion analysis indicates that Fuxin uplift and Changling sag separate away after major reservoir-forming stage of Fuyu oil layer, i.e. oil inpouring and reservoir-forming take place before Fuxin uplift upheaved in great force. The reservoir-forming of Fuyu oil layer includes two stages, i.e.the later Nenjiang period and later Mingshui period in Cretaceous. Inclusion study demonstrates oil reservoir being featured by up-source and down-storage, local-storage and vertical migration. It is clarified that the source of Fuyu oil layer might originate anciently from Changling sag. Synchronously, it is pointed out that the 'sweet point' controlled by source rock, overpressure, fault and sandbody are advantageous regions for oil exploration in the future.
出处
《中国石油勘探》
CAS
2006年第4期46-51,共6页
China Petroleum Exploration
基金
中国石油天然气股份有限公司科技项目"岩性地层油气藏形成理论与勘探实践"(040501-09)。
关键词
流体包裹体
成藏期次
成藏机理
油气勘探
扶新隆起
fluid Inclusion
reservoir forming period
reservoir-forming mechanism
oil-gas exploration
Fuxin uplift
