發(fā)布時間：2018-01-12 03:05

  本文關(guān)鍵詞：渤海灣盆地渤南洼陷沙四段油氣多期充注的流體包裹體證據(jù)　出處：《石油與天然氣地質(zhì)》2017年02期 　論文類型：期刊論文

  更多相關(guān)文章： 微束熒光光譜 均一溫度 流體包裹體 油氣多期充注 沙河街組四段 渤南洼陷 渤海灣盆地

【摘要】：為了確定渤海灣盆地渤南洼陷沙河街組四段的油氣充注歷史,對該層段24口井26塊樣品進(jìn)行了流體包裹體系統(tǒng)分析,包括顯微鑒定、微束熒光光譜分析和均一溫度測定,并結(jié)合取樣井沉積埋藏史及熱演化史分析,明確了油氣充注幕次和時間。流體包裹體分析發(fā)現(xiàn),該層段主要發(fā)育鹽水、油和含烴鹽水3類包裹體,并見瀝青包裹體及裂縫/孔隙充填瀝青。油包裹體以發(fā)黃-黃綠色和藍(lán)白色熒光為主,少量發(fā)橙色熒光;橙、黃-黃綠和藍(lán)白色熒光光譜主峰波長λmax分別為555.76~576.88,513.25~555.76和491.13~497.93 nm。紅綠熵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,它們伴生的鹽水包裹體均一溫度分別為92.6~112.2,106.4~143.7(120~140為主)和143.2~162.7℃。由此推測,渤南洼陷沙四段至少發(fā)生過早、中、晚3期油氣充注過程。通過鹽水包裹體均一溫度在沉積埋藏史和熱史圖上的投影,得到3期油氣充注時間分別為30.7~27.7,18~5和3.8~0 Ma。目前發(fā)現(xiàn)的油氣主要是第二和第三期充注的結(jié)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，

本文編號：1412393