歧北斜坡沙河街组油气成藏期次分析  

Analysis of oil and gas accumulation period in Qibei Slope Shahejie Group

作　　者：李洪香[1] 李会慎[1] 王永凯[1] 曾建宏[1] 陈淑芹[1] 孙超囡[1] 周宝仙[1] 

机构地区：[1]大港油田分公司勘探开发研究院

出　　处：《录井工程》2012年第2期49-53,92,共5页Mud Logging Engineering

基　　金：中石油股份公司科研课题"歧口富油气凹陷大油气田勘探及综合配套技术研究"部分内容(项目编号:2008E-0600)

摘　　要：歧北斜坡油气富集,成藏控制因素复杂,通过对构造演化、生排烃期次及流体包裹体特征分析以及构造发育史的恢复,对大港滨海地区沙河街组油气成藏期次进行了综合研究,认为该地区沙河街组油气藏具有两期构造运动充注、差异聚集、两期成藏的特点,油气成藏期次特征为埋藏较浅构造的高部位为一期成藏(晚期),埋藏较深构造低部位为两期成藏(早期和晚期)。油气充注形式存在两种类型:即连续型(单峰)多次充注一期成藏、非连续型(双峰)多次充注两期成藏,以晚期成藏为主。不同期次的包裹体其均一化温度、产出特征及成因特征不同:一期形成的烃包裹体主要沿石英次生加大边内侧呈带状分布,或沿加大边早期的裂缝呈带状分布;二期形成的烃包裹体主要分布在碎屑及次生加大边外侧和晚期的裂缝中,多呈带状分布。Oil and gas in Qibei Slope are enrichment with complex accumulation controlling factors.Through the analysis on the tectonic evolution,hydrocarbon generation and expulsion and characteristics of fluid inclusions and the recovery of structural history,the authors systematically analyzed hydrocarbon accumulation period in the coastal area of Shahejie Group,and considered that the oil and gas reservoirs in this area of Shahejie Group have two periods of tectonic movement filling and injection with gathered differences and the two periods of reservoir characteristics,period characteristics of oil and gas accumulation is that the higher parts of the shallow buried structure is one accumulation (late period) and the lower parts of the deep buried structure is two accumulations (early and late period).There are two types of oil and gas filling and injection forms:continuity (single peak),repeatedly filling and injection one accumulation,discontinuity (twin peaks) repeatedly filling and injection two accumulations,later accumulation is dominated,the homogenized temperature,the production characteristics and genesis for different inclusions are not same:hydrocarbon inclusions formed by one accumulation occurs mainly in strip distribution along quartz secondary overgrowth medial side,or along the overgrowth of the early cracks,hydrocarbon inclusions formed by the two accumulations mainly distribute in the debris,the secondary overgrowth lateral side and later cracks,most of them occur in strip distribution

关 键 词：歧北斜坡 流体包裹体 成藏期次 均一化温度 油气充注 

分 类 号：TE122.1[石油与天然气工程—油气勘探]