渤海湾盆地渤南洼陷沙四段油气多期充注的流体包裹体证据

发布时间：2018-01-12 03:05

  本文关键词：渤海湾盆地渤南洼陷沙四段油气多期充注的流体包裹体证据　出处：《石油与天然气地质》2017年02期 　论文类型：期刊论文

  更多相关文章： 微束荧光光谱 均一温度 流体包裹体 油气多期充注 沙河街组四段 渤南洼陷 渤海湾盆地

【摘要】：为了确定渤海湾盆地渤南洼陷沙河街组四段的油气充注历史,对该层段24口井26块样品进行了流体包裹体系统分析,包括显微鉴定、微束荧光光谱分析和均一温度测定,并结合取样井沉积埋藏史及热演化史分析,明确了油气充注幕次和时间。流体包裹体分析发现,该层段主要发育盐水、油和含烃盐水3类包裹体,并见沥青包裹体及裂缝/孔隙充填沥青。油包裹体以发黄-黄绿色和蓝白色荧光为主,少量发橙色荧光;橙、黄-黄绿和蓝白色荧光光谱主峰波长λmax分别为555.76~576.88,513.25~555.76和491.13~497.93 nm。红绿熵Q_(650/500)分布在0.21~0.39,0.43~0.96和0.95~1.17,Qt 535值分布在2.25~2.71,0.99~2.45和0.60~1.13,它们伴生的盐水包裹体均一温度分别为92.6~112.2,106.4~143.7(120~140为主)和143.2~162.7℃。由此推测,渤南洼陷沙四段至少发生过早、中、晚3期油气充注过程。通过盐水包裹体均一温度在沉积埋藏史和热史图上的投影,得到3期油气充注时间分别为30.7~27.7,18~5和3.8~0 Ma。目前发现的油气主要是第二和第三期充注的结果。
[Abstract]:In order to determine the history of oil and gas filling in the fourth member of Shahejie formation in Bonan sag of Bohai Bay basin, the fluid inclusion system of 26 samples from 24 wells in this section was analyzed, including microscopic identification. The microbeam fluorescence spectrum analysis and homogenization temperature measurement, combined with the analysis of sedimentary burial history and thermal evolution history of sampling wells, determined the injection episodes and time of oil and gas filling. The fluid inclusion analysis showed that the salt water was mainly developed in this section. Oil inclusions and hydrocarbon containing brine inclusions, and asphalt inclusions and fracture / pore filled asphalt are also found. The oil inclusions are mainly yellowish-yellowish green and blue-white, with a small amount of orange fluorescence. The main peak wavelength 位 max of orange, yellowish-yellow-green and blue-white fluorescence spectra is 555.76 ~ 576.88, respectively. 513.2555.76 and 491.13A497.93 nm.The red and green entropy QT (650 / 500) is distributed in 0.210.39. The Qt535 values of 0.43C 0.96 and 0.95U 1.17U were distributed in 2.25U 2.71U 0.992.45 and 0.600.601.13. The homogenization temperatures of brine inclusions associated with them are 92.6U 112.2N 106.4U 143.7C 120,140 and 143.2U 162.7 鈩，

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